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44 results on '"Holmestad H"'

1. AEg̅IS latest results

Author: Guatieri F., Aghion S., Amsler C., Angela G., Bonomi G., Brusa R.S., Caccia M., Caravita R., Castelli F., Cerchiari G., Comparat D., Consolati G., Demetrio A., Di Noto L., Doser M., Evans C., Fanì M., Ferragut R., Fesel J., Fontana A., Gerber S., Giammarchi M., Gligorova A., Haider S., Hinterberger A., Holmestad H., Kellerbauer A., Krasnický D., Lagomarsino V., Lansonneur P., Lebrun P., Malbrunot C., Mariazzi S., Matveev V., Mazzotta Z., Müller S.R., Nebbia G., Nedelec P., Oberthaler M., Pacifico N., Pagano D., Penasa L., Petracek V., Prelz F., Prevedelli M., Rienaecker B., Robert J., Rhne. O.M., Rotondi A., Sacerdoti M., Sandaker H., Santoro R., Simon M., Smestad L., Sorrentino F., Testera G., Tietje I.C., Widmann E., Yzombard P., Zimmer C., Zmeskal J., and Zurlo N.
Subjects: Physics, QC1-999
Abstract: The validity of the Weak Equivalence Principle (WEP) as predicted by General Relativity has been tested up to astounding precision using ordinary matter. The lack hitherto of a stable source of a probe being at the same time electrically neutral, cold and stable enough to be measured has prevented highaccuracy testing of the WEP on anti-matter. The AEg̅IS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) experiment located at CERN's AD (Antiproton Decelerator) facility aims at producing such a probe in the form of a pulsed beam of cold anti-hydrogen, and at measuring by means of a moiré deflectometer the gravitational force that Earth's mass exerts on it. Low temperature and abundance of the H̅ are paramount to attain a high precision measurement. A technique employing a charge-exchange reaction between antiprotons coming from the AD and excited positronium atoms is being developed at AEg̅IS and will be presented hereafter, alongside an overview of the experimental apparatus and the current status of the experiment
Published: 2018
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2. Towards the first measurement of matter-antimatter gravitational interaction

Author: Evans C., Aghion S., Amsler C., Bonomi G., Brusa R.S., Caccia M., Caravita R., Castelli F., Cerchiari G., Comparat D., Consolati G., Demetrio A., Di Noto L., Doser M., Fani M., Ferragut R., Fesel J., Fontana A., Gerber S., Giammarchi M., Gligorova A., Guatieri F., Haider S., Hinterberger A., Holmestad H., Kellerbauer A., Khalidova O., Krasnický D., Lagomarsino V., Lansonneur P., Lebrun P., Malbrunot C., Mariazzi S., Marton J., Matveev V., Mazzotta Z., Müller S.R., Nebbia G., Nedelec P., Oberthaler M., Pacifico N., Pagano D., Penasa L., Petracek V., Prelz F., Prevedelli M., Ravelli L., Rienaecker B., Robert J., Røhne O.M., Rotondi A., Sandaker H., Santoro R., Smestad L., Sorrentino F., Testera G., Tietje I.C., Widmann E., Yzombard P., Zimmer C., Zmeskal J., and Zurlo N.
Subjects: Physics, QC1-999
Abstract: The AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) is a CERN based experiment with the central aim to measure directly the gravitational acceleration of antihydrogen. Antihydrogen atoms will be produced via charge exchange reactions which will consist of Rydberg-excited positronium atoms sent to cooled antiprotons within an electromagnetic trap. The resulting Rydberg antihydrogen atoms will then be horizontally accelerated by an electric field gradient (Stark effect), they will then pass through a moiré deflectometer. The vertical deflection caused by the Earth's gravitational field will test for the first time the Weak Equivalence Principle for antimatter. Detection will be undertaken via a position sensitive detector. Around 103 antihydrogen atoms are needed for the gravitational measurement to be completed. The present status, current achievements and results will be presented, with special attention toward the laser excitation of positronium (Ps) to the n=3 state and the production of Ps atoms in the transmission geometry.
Published: 2018
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3. Probing antimatter gravity – The AEGIS experiment at CERN

Author: Kellerbauer A., Aghion S., Amsler C., Ariga A., Ariga T., Bonomi G., Bräunig P., Bremer J., Brusa R. S., Cabaret L., Caccia M., Caravita R., Castelli F., Cerchiari G., Chlouba K., Cialdi S., Comparat D., Consolati G., Demetrio A., Di Noto L., Doser M., Dudarev A., Ereditato A., Evans C., Ferragut R., Fesel J., Fontana A., Gerber S., Giammarchi M., Gligorova A., Guatieri F., Haider S., Holmestad H., Huse T., Jordan E., Kimura M., Koettig T., Krasnický D., Lagomarsino V., Lansonneur P., Lebrun P., Lehner S., Liberadzka J., Malbrunot C., Mariazzi S., Matveev V., Mazzotta Z., Nebbia G., Nédélec P., Oberthaler M., Pacifico N., Pagano D., Penasa L., Petráček V., Pistillo C., Prelz F., Prevedelli M., Ravelli L., Rienäcker B., Røhne O.M., Rotondi A., Sacerdoti M., Sandaker H., Santoro R., Scampoli P., Smestad L., Sorrentino F., Špaček M., Storey J., Strojek I.M., Testera G., Tietje I., Widmann E., Yzombard P., Zavatarelli S., Zmeskal J., and Zurlo N.
Subjects: Physics, QC1-999
Abstract: The weak equivalence principle states that the motion of a body in a gravitational field is independent of its structure or composition. This postulate of general relativity has been tested to very high precision with ordinary matter, but no relevant experimental verification with antimatter has ever been carried out. The AEGIS experiment will measure the gravitational acceleration of antihydrogen to ultimately 1% precision. For this purpose, a pulsed horizontal antihydrogen beam with a velocity of several 100 m s−1 will be produced. Its vertical deflection due to gravity will be detected by a setup consisting of material gratings coupled with a position-sensitive detector, operating as a moiré deflectometer or an atom interferometer. The AEGIS experiment is installed at CERN’s Antiproton Decelerator, currently the only facility in the world which produces copious amounts of low-energy antiprotons. The construction of the setup has been going on since 2010 and is nearing completion. A proof-of-principle experiment with antiprotons has demonstrated that the deflection of antiparticles by a few μm due to an external force can be detected. Technological and scientific development pertaining to specific challenges of the experiment, such as antihydrogen formation by positronium charge exchange or the position-sensitive detection of antihydrogen annihilations, is ongoing.
Published: 2016
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4. Experiments with low-energy antimatter

Author: Consolati G., Aghion S., Amsler C., Ariga A., Ariga T., Belov A., Bonomi G., Bräunig P., Bremer J., Brusa R.S., Cabaret L., Caccia M., Caravita R., Castelli F., Cerchiari G., Chlouba K., Cialdi S., Comparat D., Demetrio A., Derking H., Di Noto L., Doser M., Dudarev A., Ereditato A., Ferragut R., Fontana A., Gerber S., Giammarchi M., Gligorova A., Gninenko S., Haider S., Hogan S., Holmestad H., Huse T., Jordan E. J., Kawada J., Kellerbauer A., Kimura M., Krasnicky D., Lagomarsino V., Lehner S., Malbrunot C., Mariazzi S., Matveev V., Mazzotta Z., Nebbia G., Nedelec P., Oberthaler M., Pacifico N., Penasa L., Petracek V., Pistillo C., Prelz F., Prevedelli M., Ravelli L., Riccardi C., Røhne O.M., Rosenberger S., Rotondi A., Sacerdoti M., Sandaker H., Santoro R., Scampoli P., Simon M., Spacek M., Storey J., Strojek I. M., Subieta M., Testera G., Widmann E., Yzombard P., Zavatarelli S., and Zmeskal J.
Subjects: Physics, QC1-999
Abstract: Investigations on antimatter allow us to shed light on fundamental issues of contemporary physics. The only antiatom presently available, antihydrogen, is produced making use of the Antiproton Decelerator (AD) facility at CERN. International collaborations currently on the floor (ALPHA, ASACUSA and ATRAP) have succeeded in producing antihydrogen and are now involved in its confinement and manipulation. The AEGIS experiment is currently completing the commissioning of the apparatus which will generate and manipulate antiatoms. The present paper, after a report on the main results achieved with antihydrogen physics, gives an overview of the AEGIS experiment, describes its current status and discusses its first target.
Published: 2015
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5. AEgIS at ELENA: outlook for physics with a pulsed cold antihydrogen beam

Author: Doser, M., Aghion, S., Amsler, C., Bonomi, G., Brusa, R. S., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Evans, C., Fanì, M., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Marton, J., Matveev, V., Mazzotta, Z., Müller, S. R., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienaecker, B., Robert, J., Røhne, O. M., Rotondi, A., Sandaker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I. C., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., and Zurlo, N.
Published: 2018

6. Characterization of a transmission positron/positronium converter for antihydrogen production

Author: Aghion, S., Amsler, C., Ariga, T., Bonomi, G., Brusa, R.S., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Müller, S.R., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Povolo, L., Prelz, F., Prevedelli, M., Ravelli, L., Resch, L., Rienäcker, B., Robert, J., Røhne, O.M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Simon, M., Smestad, L., Sorrentino, F., Testera, G., Tietje, I.C., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., Zurlo, N., Andersen, S.L., Chevallier, J., Uggerhøj, U.I., and Lyckegaard, F.
Published: 2017
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7. Direct detection of antiprotons with the Timepix3 in a new electrostatic selection beamline

Author: Pacifico, N., Aghion, S., Alozy, J., Amsler, C., Ariga, A., Ariga, T., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R.S., Cabaret, L., Caccia, M., Campbell, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Jordan, E., Kellerbauer, A., Kimura, M., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lawler, G., Lebrun, P., Llopart, X., Malbrunot, C., Mariazzi, S., Marx, L., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Resch, L., Røhne, O.M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Smestad, L., Sorrentino, F., Spacek, M., Storey, J., Strojek, I.M., Testera, G., Tietje, I., Tlustos, L., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., and Zurlo, N.
Published: 2016
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8. Positron bunching and electrostatic transport system for the production and emission of dense positronium clouds into vacuum

Author: Aghion, S., Amsler, C., Ariga, A., Ariga, T., Belov, A.S., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R.S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Evans, C., Fesel, J., Fontana, A., Forslund, O.K., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Jernelv, I.L., Jordan, E., Kaltenbacher, T., Kellerbauer, A., Kimura, M., Koetting, T., Krasnicky, D., Lagomarsino, V., Lebrun, P., Lansonneur, P., Lehner, S., Liberadzka, J., Malbrunot, C., Mariazzi, S., Marx, L., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Rienäcker, B., Røhne, O.M., Rosenberger, S., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Sorrentino, F., Spacek, M., Storey, J., Strojek, I.M., Testera, G., Tietje, I., Vamosi, S., Widmann, E., Yzombard, P., Zavatarelli, S., and Zmeskal, J.
Published: 2015
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9. The AEgIS experiment

Author: Testera, G., Aghion, S., Amsler, C., Ariga, A., Ariga, T., Belov, A., Bonomi, G., Braunig, P., Bremer, J., Brusa, R., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Curreli, S., Demetrio, A., Derking, H., Noto, L. Di, Doser, M., Dudarev, A., Ereditato, A., Ferragut, R., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Haider, S., Hogan, S., Holmestad, H., Huse, T., Jordan, E. J., Kawada, J., Kellerbauer, A., Kimura, M., Krasnický, D., Lagomarsino, V., Lehner, S., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Riccardi, C., Røhne, O. M., Rosenberger, S., Rotondi, A., Sandaker, H., Santoro, R., Scampoli, P., Semeria, L., Simon, M., Spacek, M., Storey, J., Strojek, I. M., Subieta, M., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., and (AEgIS Collaboration)
Published: 2015
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10. Emulsion detectors for the antihydrogen detection in AEgIS

Author: Pistillo, C., Aghion, S., Amsler, C., Ariga, A., Ariga, T., Belov, A., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R. S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Derking, H., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Ferragut, R., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Haider, S., Hogan, S., Holmestad, H., Huse, T., Jordan, E. J., Kawada, J., Kellerbauer, A., Kimura, M., Krasnický, D., Lagomarsino, V., Lehner, S., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Nebbia, G., Nédélec, P., Oberthaler, M., Pacifico, N., Penasa, L., Petráček, V., Prelz, F., Prevedelli, M., Ravelli, L., Riccardi, C., Røhne, O., Rosenberger, S., Rotondi, A., Sandaker, H., Santoro, R., Scampoli, P., Simon, M., Špaček, M., Storey, J., Strojek, I. M., Subieta, M., Testera, G., Widmann, E., Yzombard, P., Zavatarelli, S., and Zmeskal, J.
Published: 2015
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11. Velocity-selected production of 2S3 metastable positronium

Author: Amsler, C., Antonello, M., Belov, A., Bonomi, G., Brusa, R. S., Caccia, M., Camper, A., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Fanì, M., Gerber, S., Gligorova, A., Guatieri, F., Hackstock, P., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Müller, S. R., Nebbia, G., Nedelec, P., Oberthaler, M., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienaecker, B., Robert, J., Røhne, O. M., Rotondi, A., Sandaker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I. C., Widmann, E., Yzombard, P., Zimmer, C., Zurlo, N., Amsler, C., Antonello, M., Belov, A., Bonomi, G., Brusa, R. S., Caccia, M., Camper, A., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Fanì, M., Gerber, S., Gligorova, A., Guatieri, F., Hackstock, P., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Müller, S. R., Nebbia, G., Nedelec, P., Oberthaler, M., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienaecker, B., Robert, J., Røhne, O. M., Rotondi, A., Sandaker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I. C., Widmann, E., Yzombard, P., Zimmer, C., and Zurlo, N.
Subjects: positronium, antihydrogen
Abstract: Positronium in the 2 3 S metastable state exhibits a low electrical polarizability and a long lifetime (1140 ns), making it a promising candidate for interferometry experiments with a neutral matter-antimatter system. In the present work, 2 3 S positronium is produced, in the absence of an electric field, via spontaneous radiative decay from the 3 3 P level populated with a 205-nm UV laser pulse. Thanks to the short temporal length of the pulse, 1.5 ns full width at half maximum, different velocity populations of a positronium cloud emitted from a nanochanneled positron-positronium converter were selected by delaying the excitation pulse with respect to the production instant. 2 3 S positronium atoms with velocity tuned between 7 × 10 4 ms −1 and 10 × 10 4 ms −1 were thus produced. Depending on the selected velocity, a 2 3 S production efficiency ranging from ∼0.8% to ∼1.7%, with respect to the total amount of emitted positronium, was obtained. The observed results give a branching ratio for the 3 3 P-2 3 S spontaneous decay of (9.7 ± 2.7)%. The present velocity selection technique could allow one to produce an almost monochromatic beam of ∼1 × 10 3 2 3 S atoms with a velocity spread of
Published: 2019

12. The AEgIS experiment at CERN: Probing antimatter gravity

Author: Caravita, R., Aghion, S., Amsler, C., Antonello, M., Belov, A., Bonomi, G., Brusa, R.S., Caccia, M., Camper, A., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Evans, C., Fani, M., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Hackstock, P., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnicky, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Marton, J., Matveev, V., Muller, S.R., Nebbia, G., Nedelec, P., Oberthaler, M., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienacker, B., Robert, J., Røhne, O.M., Rotondi, A., Sandaker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I., Vujanovic, M., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., Zurlo, N., Laboratoire Aimé Cotton (LAC), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), AEgIS, Caravita, R, Aghion, S, Amsler, C, Antonello, M, Belov, A, Bonomi, G, Brusa, RS, Caccia, M, Camper, A, Castelli, F, Cerchiari, G, Comparat, D, Consolati, G, Demetrio, A, Di Noto, L, Doser, M, Evans, C, Fani, M, Ferragut, R, Fesel, J, Fontana, A, Gerber, S, Giammarchi, M, Gligorova, A, Guatieri, F, Hackstock, P, Haider, S, Hinterberger, A, Holmestad, H, Kellerbauer, A, Khalidova, O, Krasnicky, D, Lagomarsino, V, Lansonneur, P, Lebrun, P, Malbrunot, C, Mariazzi, S, Marton, J, Matveev, V, M'uller, SR, Nebbia, G, Nedelec, P, Oberthaler, M, Pagano, D, Penasa, L, Petracek, V, Prelz, F, Prevedelli, M, Rienacker, B, Robert, J, Rohne, OM, Rotondi, A, Sandaker, H, Santoro, R, Smestad, L, Sorrentino, F, Testera, G, Tietje, I, Vujanovic, M, Widmann, E, Yzombard, P, Zimmer, C, Zmeskal, J, Zurlo, N, Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Subjects: Physics::General Physics, CERN Lab, deflection, antihydrogen: production, positronium: production, talk: Bologna 2018/09/02, antimatter: gravitation, Physics::Atomic and Molecular Clusters, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Accelerator Physics, High Energy Physics::Experiment, Physics::Atomic Physics, gravity, antimatter, Particle Physics - Experiment, experimental results
Abstract: International audience; The AE$\overline{g}$IS experiment at CERN’s Antiproton Decelerator is set up to precisely measure the gravitational interaction between matter and antimatter. For this purpose, antihydrogen will be formed from cold antiprotons and positronium, the hydrogen-like bound state of an electron and a positron. Subsequently, the free-fall acceleration of a cold horizontal beam of antihydrogen will be measured by a deflectometer. The present status, recent experimental progress and the medium-term plan of the AE$\overline{g}$IS experiment are presented.
Published: 2018
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13. Producing long-lived 2 3S positronium via 3 3P laser excitation in magnetic and electric fields

Author: Aghion, S., Amsler, C., Antonello, M., Belov, A., Bonomi, G., Brusa, R. S., Caccia, M., Camper, A., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Evans, C., Fani, M., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Hackstock, P., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnicky, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Marton, J., Matveev, V., Mazzotta, Z., Muller, S. R., Nebbia, G., Nedelec, P., Oberthaler, M., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienaecker, B., Robert, J., Rohne, O. M., Rotondi, A., Sandaker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I. C., Vujanovic, M., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., Zurlo, N., Aghion, S., Amsler, C., Antonello, M., Belov, A., Bonomi, G., Brusa, R.S., Caccia, M., Camper, A., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Evans, C., Fanì, M., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Hackstock, P., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Marton, J., Matveev, V., Mazzotta, Z., Müller, S.R., Nebbia, G., Nedelec, P., Oberthaler, M., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienaecker, B., Robert, J., Røhne, O.M., Rotondi, A., Sandaker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I.C., Vujanovic, M., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., and Zurlo, N.
Subjects: Atomic and Molecular Physics, and Optics, Positronium, Atomic and Molecular Physics, and Optics, Atomic and Molecular Physics, and Optics
Abstract: Producing positronium (Ps) in the metastable 2 3 S state is of interest for various applications in fundamental physics. We report here on an experiment in which Ps atoms are produced in this long-lived state by spontaneous radiative decay of Ps excited to the 3 3 P level manifold. The Ps cloud excitation is obtained with a UV laser pulse in an experimental vacuum chamber in presence of guiding magnetic field of 25 mT and an average electric field of 300 V cm−1. The evidence of the 2 3 S state production is obtained to the 3.6σ level of statistical significance using a novel analysis technique of the single-shot positronium annihilation lifetime spectra. The dynamic of the Ps population on the involved levels has been studied with a rate equation model.
Published: 2018
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14. Velocity-selected production of 2 S 3 metastable positronium

Author: Amsler, C., Antonello, M., Belov, A., Bonomi, G., Brusa, R. S., Caccia, M., Camper, A., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Fanì, M., Gerber, S., Gligorova, A., Guatieri, F., Hackstock, P., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Müller, S. R., Nebbia, G., Nedelec, P., Oberthaler, M., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienaecker, B., Robert, J., Røhne, O. M., Rotondi, A., Sandaker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I. C., Widmann, E., Yzombard, P., Zimmer, C., and Zurlo, N.
Subjects: positronium, antimatter, Atomic and Molecular Physics, positronium, antimatter, and Optics, Atomic and Molecular Physics, and Optics
Published: 2019

15. Correction to: Compression of a mixed antiproton and electron non-neutral plasma to high densities (The European Physical Journal D, (2018), 72, 4, (76), 10.1140/epjd/e2018-80617-x)

Author: Aghion, S., Amsler, C., Bonomi, G., Brusa, R. S., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Evans, C., Fani, M., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnicky, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Marton, J., Matveev, V., Mazzotta, Z., Muller, S. R., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienaecker, B., Robert, J., Rohne, O. M., Rotondi, A., Sandaker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I. C., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., Zurlo, N., and Antonello, M.
Published: 2019

16. Producing long-lived $2{\phantom{\rule{0.16em}{0ex}}}^{3}S$ positronium via $3{\phantom{\rule{0.16em}{0ex}}}^{3}P$ laser excitation in magnetic and electric fields

Author: Aghion, S., Amsler, C., Antonello, M., Belov, A., Bonomi, G., Brusa, R.S., Caccia, M., Camper, A., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Evans, C., Fanì, M., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Hackstock, P., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Marton, J., Matveev, V., Mazzotta, Z., Müller, S.R., Nebbia, G., Nedelec, P., Oberthaler, M., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienaecker, B., Robert, J., Røhne, O.M., Rotondi, A., Sandaker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I.C., Vujanovic, M., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., and Zurlo, N.
Subjects: Physics in General
Abstract: Producing positronium (Ps) in the metastable 23S state is of interest for various applications in fundamental physics. We report here on an experiment in which Ps atoms are produced in this long-lived state by spontaneous radiative decay of Ps excited to the 33P level manifold. The Ps cloud excitation is obtained with a UV laser pulse in an experimental vacuum chamber in presence of guiding magnetic field of 25mT and an average electric field of 300Vcm−1. The evidence of the 23S state production is obtained to the 3.6σ level of statistical significance using a novel analysis technique of the single-shot positronium annihilation lifetime spectra. The dynamic of the Ps population on the involved levels has been studied with a rate equation model. Producing positronium (Ps) in the metastable $2^3\text{S}$ state is of interest for various applications in fundamental physics. We report here about an experiment in which Ps atoms are produced in this long-lived state by spontaneous radiative decay of Ps excited to the $3^3\text{P}$ level manifold. The Ps cloud excitation is obtained with a UV laser pulse in an experimental vacuum chamber in presence of guiding magnetic field of 25 mT and an average electric field of 300 V/cm. The indication of the $2^3\text{S}$ state production is obtained from a novel analysis technique of single-shot positronium annihilation lifetime spectra. Its production efficiency relative to the total amount of formed Ps is evaluated by fitting a simple rate equations model to the experimental data and found to be $ (2.1 \pm 1.3) \, \% $.
Published: 2018

17. AE$\overline{g}$IS latest results

Author: Guatieri, F, Aghion, S, Amsler, C, Angela, G, Bonomi, G, Brusa, R S, Caccia, M, Caravita, R, Castelli, F, Cerchiari, G, Comparat, D, Consolati, G, Demetrio, A, Di Noto, L, Doser, M, Evans, C, Fanì, M, Ferragut, R, Fesel, J, Fontana, A, Gerber, S, Giammarchi, M, Gligorova, A, Haider, S, Hinterberger, A, Holmestad, H, Kellerbauer, A, Krasnický, D, Lagomarsino, V, Lansonneur, P, Lebrun, P, Malbrunot, C, Mariazzi, S, Matveev, V, Mazzotta, Z, Müller, S R, Nebbia, G, Nedelec, P, Oberthaler, M, Pacifico, N, Pagano, D, Penasa, L, Petracek, V, Prelz, F, Prevedelli, M, Rienaecker, B, Robert, J, Rhne , O M, Rotondi, A, Sacerdoti, M, Sandaker, H, Santoro, R, Simon, M, Smestad, L, Sorrentino, F, Testera, G, Tietje, I C, Widmann, E, Yzombard, P, Zimmer, C, Zmeskal, J, and Zurlo, N
Subjects: Detectors and Experimental Techniques, Particle Physics - Experiment
Abstract: The validity of the Weak Equivalence Principle (WEP) as predicted by General Relativity has been tested up to astounding precision using ordinary matter. The lack hitherto of a stable source of a probe being at the same time electrically neutral, cold and stable enough to be measured has prevented highaccuracy testing of the WEP on anti-matter. The AEg̅IS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) experiment located at CERN's AD (Antiproton Decelerator) facility aims at producing such a probe in the form of a pulsed beam of cold anti-hydrogen, and at measuring by means of a moiré deflectometer the gravitational force that Earth's mass exerts on it. Low temperature and abundance of the H̅ are paramount to attain a high precision measurement. A technique employing a charge-exchange reaction between antiprotons coming from the AD and excited positronium atoms is being developed at AEg̅IS and will be presented hereafter, alongside an overview of the experimental apparatus and the current status of the experiment.
Published: 2018

18. The Weak Equivalence Principle With Antimatter: The AEgIS Experiment At CERN

Author: Pagano, D., Amsler, C., Ariga, T., Bonomi, G., Bräunig, P., Brusa, R. S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Andrea Fontana, Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Kellerbauer, A., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Rienaecker, B., Røhne, O. M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Smestad, L., Sorrentino, F., Strojek, I. M., Testera, G., Tietje, I. C., Vamosi, S., Widmann, E., Yzombard, P., Zmeskal, J., Zurlo, N., Pagano, D., Amsler, C., Ariga, T., Bonomi, G., Braunig, P., Brusa, R. S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Kellerbauer, A., Krasnicky, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Rienaecker, B., Rohne, O. M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Smestad, L., Sorrentino, F., Strojek, I. M., Testera, G., Tietje, I. C., Vamosi, S., Widmann, E., Yzombard, P., Zmeskal, J., and Zurlo, N.
Subjects: Physics::General Physics, Astrophysics and Astronomy, Physics::Atomic and Molecular Clusters, Physics::Accelerator Physics, Physics::Atomic Physics, Particle Physics - Experiment
Abstract: The AEgIS experiment at CERN’s Antiproton Decelerator (AD) aims at performing a direct measurement of the gravitational force on antimatter to probe the Weak Equivalence Principle of General Relativity with antimatter. The idea is to measure the vertical displacement of a cold antihydrogen beam, due to the gravitational force, by using a moiré deflectometer. Antihydrogen will be formed through the reaction of charge exchange between cold antiprotons and Rydberg positronium. An overview of the physics goals, experimental setup and preliminary results is presented.
Published: 2016

19. Towards a gravity measurement on cold antimatter atoms

Author: Caravita, R., Aghion, S., Amsler, C., Ariga, A., Ariga, T., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R. S., Cabaret, L., Caccia, M., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Noto, L. Di, Doser, M., Dudarev, A., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Forslund, O. K., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Jernelv, I. L., Jordan, E., Kaltenbacher, T., Kellerbauer, A., Kimura, M., Koetting, T., Krasnicky, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Lehner, S., Liberadzka, J., Malbrunot, C., Mariazzi, S., Marx, L., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Resch, L., Rienäcker, B., Røhne, O. M., Rosenberger, S., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Sorrentino, F., Spacek, M., Storey, J., Strojek, I. M., Testera, G., Tietje, I., Vamosi, S., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., Caravita, R., Aghion, S., Amsler, C., Ariga, A., Ariga, T., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R.S., Cabaret, L., Caccia, M., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Forslund, O.K., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Jernelv, I.L., Jordan, E., Kaltenbacher, T., Kellerbauer, A., Kimura, M., Koetting, T., Krasnicky, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Lehner, S., Liberadzka, J., Malbrunot, C., Mariazzi, S., Marx, L., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Resch, L., Rienäcker, B., Rohne, O.M., Rosenberger, S., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Sorrentino, F., Spacek, M., Storey, J., Strojek, I.M., Testera, G., Tietje, I., Vamosi, S., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and AEGIS
Subjects: Physics and Astronomy (miscellaneous), Physics in General, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Accelerator Physics, Astronomy and Astrophysics, High Energy Physics::Experiment, Physics::Atomic Physics, gravity, antimatter, Nuclear Experiment
Abstract: International audience; The present status of the AEGIS experiment at CERN (AD-06), on the way of forming anti-hydrogen for a first gravity measurement, is reviewed.Recent results in trapping and cooling positrons and antiprotons in the main electromagnetic traps are presented, including the storage time measurement obtained during the 2014 run with antiprotons, the observation of centrifugal separation of a mixed antiproton/electron plasma and positron accumulation and transfer results obtained during 2015.
Published: 2016
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20. AEgIS Experiment: Status & Outlook

Author: Lansonneur, P., Aghion, S., Amsler, C., Bonomi, G., Brusa, R. S., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnicky, D., Lagomarsino, V., Lebrun, P., Malbrunot, C., Mariazzi, S., Marton, J., Matveev, V., Mazzotta, Z., Müller, S. R., Nebbia, G., Nedelec, P., Oberthaler, M., Pacico, N., Pagano, D., Penasa, L., Petracek, V., Francesco Prelz, Prevedelli, M., Ravelli, L., Rienaecker, B., Robert, J., Rhøne, O. M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Simon, M., Smestad, L., Sorrentino, F., Testera, G., Tietje, I. C., Widmann, E., Yzombard, P., Zimmer, C., Zmeska, J., Zurlo, N., Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Aimé Cotton (LAC), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon ( IPNL ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Aimé Cotton ( LAC ), École normale supérieure - Cachan ( ENS Cachan ) -Université Paris-Sud - Paris 11 ( UP11 ) -Centre National de la Recherche Scientifique ( CNRS ), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan)
Subjects: Physics::General Physics, experimental methods, CERN Lab, General Relativity and Cosmology, interferometer, antihydrogen: beam, [ PHYS.GRQC ] Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], gravitation, positron: capture, anti-p: capture, antimatter, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], Physics::Atomic and Molecular Clusters, spectrometer, Physics::Atomic Physics, positronium: excited state
Abstract: International audience; The AEGIS experiment 1 (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) is planned to perform the first measurement of the gravitational acceleration on antimatter by observing the free fall of antihydrogen atoms. By combining techniques based on recent developments in the production of positronium and its laser excitation to Rydberg states, such a study seems indeed to be feasible for neutral antimatter. We present here some of the experimental techniques involved in the experiment as well as the status of the detector test envisioned for the gravity measurement.
Published: 2017

21. The DAQ system for the AE$\bar g$IS experiment

Author: Prelz, F, Aghion, S, Amsler, C, Ariga, T, Bonomi, G, Brusa, R S, Caccia, M, Caravita, R, Castelli, F, Cerchiari, G, Comparat, D, Consolati, G, Demetrio, A, Di Noto, L, Doser, M, Ereditato, A, Evans, C, Ferragut, R, Fesel, J, Fontana, A, Gerber, S, Giammarchi, M, Gligorova, A, Guatieri, F, Haider, S, Hinterberger, A, Holmestad, H, Kellerbauer, A, Krasnický, D, Lagomarsino, V, Lansonneur, P, Lebrun, P, Malbrunot, C, Mariazzi, S, Matveev, V, Mazzotta, Z, Müller, S R, Nebbia, G, Nedelec, P, Oberthaler, M, Pacifico, N, Pagano, D, Penasa, L, Petracek, V, Prevedelli, M, Ravelli, L, Rienaecker, B, Robert, J, Røhne, O M, Rotondi, A, Sacerdoti, M, Sandaker, H, Santoro, R, Scampoli, P, Simon, M, Smestad, L, Sorrentino, F, Testera, G, Tietje, I C, Widmann, E, Yzombard, P, Zimmer, C, Zmeskal, J, Zurlo, N, Laboratoire Aimé Cotton (LAC), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Subjects: sociology, monitoring, Automatic Keywords, CERN Lab, data acquisition, [INFO]Computer Science [cs], CPT, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, programming, Computing and Computers
Abstract: International audience; In the sociology of small- to mid-sized (O(100) collaborators) experiments the issue of data collection and storage is sometimes felt as a residual problem for which well-established solutions are known. Still, the DAQ system can be one of the few forces that drive towards the integration of otherwise loosely coupled detector systems. As such it may be hard to complete with off-the-shelf components only. LabVIEW and ROOT are the (only) two software systems that were assumed to be familiar enough to all collaborators of the AEḡIS (AD6) experiment at CERN: working out of the GXML representation of LabVIEW Data types, a semantically equivalent representation as ROOT TTrees was developed for permanent storage and analysis. All data in the experiment is cast into this common format and can be produced and consumed on both systems and transferred over TCP and/or multicast over UDP for immediate sharing over the experiment LAN. We describe the setup that has been able to cater to all run data logging and long term monitoring needs of the AEḡIS experiment so far.
Published: 2016
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22. Experiments with low-energy antimatter

Author: Aghion, S., Gerber, S., Mariazzi, S., Malbrunot, C., Eidelman, S., Caravita, R., Demetrio, A., Zavatarelli, S., Di Noto, L., Storey, James William, Giardina, G., Rotondi, A., Petracek, V., Fontana, A., Testera, G., Amsler, Claude, Oberthaler, M., Comparat, D., Rosenberger, S., Brusa, R.S., Bonomi, G., Nedelec, P., Doser, M., Consolati, G., Lehner, S., Prelz, F., Riccardi, C., Cabaret, L., Zmeskal, J., Castelli, F., Derking, H., Chlouba, K., Jordan, E. J., Pacifico, N., Widmann, E., Bremer, J., Sacerdoti, M., Mandaglio, G., Hogan, S., Giammarchi, M., Ariga, Akitaka, Gligorova, A., Scampoli, Paola, Pistillo, Ciro, Strojek, I. M., Gninenko, S., Simon, M., Nebbia, G., Santoro, R., Kimura, Mitsuhiro, Cerchiari, G., Kellerbauer, A., Penasa, L., Kawada, Jiro, Venanzoni, G., Battaglieri, M., Cialdi, S., Dudarev, A., Prevedelli, M., Ariga, Tomoko, Matveev, V., Yzombard, P., Caccia, M., Krasnicky, D., Sandaker, H., Røhne, O.M., Holmestad, H., Bräunig, P., Ereditato, Antonio, Mazzotta, Z., Belov, A., Subieta, M., Ferragut, R., Lagomarsino, V., Ravelli, L., Haider, S., Huse, T., Spacek, M., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), G., Giardina, G., Consolati, S., Aghion, C., Amsler, A., Ariga, T., Ariga, A., Belov, G., Bonomi, P., Bräunig, J., Bremer, R. S., Brusa, L., Cabaret, M., Caccia, R., Caravita, F., Castelli, G., Cerchiari, K., Chlouba, S., Cialdi, D., Comparat, A., Demetrio, H., Derking, L., Di Noto, M., Doser, A., Dudarev, A., Ereditato, R., Ferragut, A., Fontana, S., Gerber, M., Giammarchi, A., Gligorova, S., Gninenko, S., Haider, S., Hogan, H., Holmestad, T., Huse, E. J., Jordan, J., Kawada, A., Kellerbauer, M., Kimura, D., Krasnicky, V., Lagomarsino, S., Lehner, C., Malbrunot, S., Mariazzi, V., Matveev, Z., Mazzotta, G., Nebbia, P., Nedelec, M., Oberthaler, N., Pacifico, L., Penasa, V., Petracek, C., Pistillo, F., Prelz, M., Prevedelli, L., Ravelli, C., Riccardi, O. M., Røhne, S., Rosenberger, A., Rotondi, M., Sacerdoti, H., Sandaker, R., Santoro, Scampoli, Paola, M., Simon, M., Spacek, J., Storey, I. M., Strojek, M., Subieta, G., Testera, E., Widmann, P., Yzombard, S., Zavatarelli, J., Zmeskal, S., Eidelman, G., Venanzoni, M., Battaglieri, and G., Mandaglio
Subjects: Physics, Large Hadron Collider, 530 Physics, QC1-999, PLASMAS, ANTIHYDROGEN BEAM, AEGIS EXPERIMENT, PENNING TRAP, GRAVITY, SILICA, ATOMS, Nuclear physics, Antiproton Decelerator, Physics and Astronomy (all), Low energy, Antimatter, Systems engineering, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Antihydrogen, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Particle Physics - Experiment, ComputingMilieux_MISCELLANEOUS
Abstract: Investigations on antimatter allow us to shed light on fundamental issues of contemporary physics. The only antiatom presently available, antihydrogen, is produced making use of the Antiproton Decelerator (AD) facility at CERN. International collaborations currently on the floor (ALPHA, ASACUSA and ATRAP) have succeeded in producing antihydrogen and are now involved in its confinement and manipulation. The AEGIS experiment is currently completing the commissioning of the apparatus which will generate and manipulate antiatoms. The present paper, after a report on the main results achieved with antihydrogen physics, gives an overview of the AEGIS experiment, describes its current status and discusses its first target.
Published: 2015
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23. Imaging a positronium cloud in a 1 Tesla

Author: Camper Antoine, Aghion Stefano, Amsler Claude, Antonello Massimiliano, Belov Alexander, Bonomi Germano, Brusa Roberto, Caccia Massimo, Caravita Ruggero, Castelli Fabrizio, Cerchiari Giovanni, Comparat Daniel, Consolati Giovanni, Demetrio Andrea, Di Noto Lea, Doser Michael, Evans Craig, Fanì Mattia, Ferragut Rafael, Fesel Julian, Fontana Andrea, Gerber Sebastian, Giammarchi Marco, Gligorova Angela, Guatieri Francesco, Hackstock Philip, Haider Stefan, Hinterberger Alexander, Holmestad Helga, Kellerbauer Alban, Khalidova Olga, Krasnický Daniel, Lagomarsino Vittorio, Lansonneur Pierre, Lebrun Patrice, Malbrunot Chloé, Mariazzi Sebastiano, Marton Johann, Matveev Viktor, Müller Simon, Nebbia Giancarlo, Nedelec Patrick, Oberthaler Markus, Pagano Davide, Penasa Luca, Petracek Vojtech, Prelz Francesco, Prevedelli Marco, Rienaecker Benjamin, Robert Jacques, Røhne Ole, Rotondi Alberto, Sandaker Heidi, Santoro Romualdo, Smestad Lillian, Sorrentino Fiodor, Testera Gemma, Tietje Ingmari, Vujanovic Milena, Widmann Eberhard, Yzombard Pauline, Zimmer Christian, Zmeskal Johann, and Zurlo Nicola
Subjects: Physics, QC1-999
Abstract: We report on recent developments in positronium work in the frame of antihydrogen production through charge exchange in the AEgIS collaboration [1]. In particular, we present a new technique based on spatially imaging a cloud of positronium by collecting the positrons emitted by photoionization. This background free diagnostic proves to be highly efficient and opens up new opportunities for spectroscopy on antimatter, control and laser manipulation of positronium clouds as well as Doppler velocimetry.
Published: 2019
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24. Testing the Weak Equivalence Principle with an antimatter beam at CERN

Author: Ravelli, L, Zmeskal, J., Yzombard, P, Bonomi, G., Ereditato, Antonio, Kellerbauer, A, Cerchiari, G., Riccardi, C, Pagano, D, Lehner, S, Holmestad, H, Spacek, M, Amsler, Claude, Haider, S, Storey, James William, Matveev, V, Kimura, Mitsuhiro, Krasnicky, D, Sorrentino, F, Doser, M, Caravita, R., Belov, A., Ariga, Akitaka, Jordan, E J, Zavatarelli, S, Lagomarsino, V, Cialdi, S, Caccia, M., Røhne, O M, Testera, G, Gerber, S, Chlouba, K., Castelli, F., Rotondi, A, Scampoli, Paola, Santoro, R, Ariga, Tomoko, Malbrunot, C, Comparat, D, Kawada, Jiro, Dudarev, A, Oberthaler, M, Demetrio, A, Bräunig, P., Derking, H, Ferragut, R, Huse, T, Pistillo, Ciro, Mazzotta, Z, Noto, L Di, Cabaret, L., Bremer, J., Pacifico, N, Strojek, I M, Petracek, V, Sandaker, H, Rosenberger, S, Gninenko, S, Widmann, E, Penasa, L, Prevedelli, M, Consolati, G, Fontana, A, Brusa, R. S., Gligorova, A, Prelz, F, Aghion, S., Nedelec, P, Subieta, M, Giammarchi, M, Mariazzi, S, Nebbia, G, and Sacerdoti, M
Subjects: Physics::General Physics, 530 Physics, Physics::Atomic and Molecular Clusters, Physics::Accelerator Physics, Physics::Atomic Physics, 7. Clean energy
Abstract: The goal of the AEgIS experiment is to measure the gravitational acceleration of antihydrogen – the simplest atom consisting entirely of antimatter – with the ultimate precision of 1%. We plan to verify the Weak Equivalence Principle (WEP), one of the fundamental laws of nature, with an antimatter beam. The experiment consists of a positron accumulator, an antiproton trap and a Stark accelerator in a solenoidal magnetic field to form and accelerate a pulsed beam of antihydrogen atoms towards a free-fall detector. The antihydrogen beam passes through a moir ́e deflectometer to measure the vertical displacement due to the gravitational force. A position and time sensitive hybrid detector registers the annihilation points of the antihydrogen atoms and their time-of-flight. The detection principle has been successfully tested with antiprotons and a miniature moir ́e deflectometer coupled to a nuclear emulsion detector.

25. Producing long-lived 2 3 S positronium via 3 3 P laser excitation in magnetic and electric fields

Author: Aghion, S., Amsler, C., Antonello, M., Belov, A., Bonomi, G., Brusa, R. S., Caccia, M., Camper, A., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Evans, C., Fanì, M., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Hackstock, P., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Marton, J., Matveev, V., Mazzotta, Z., Müller, S. R., Nebbia, G., Nedelec, P., Oberthaler, M., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienaecker, B., Robert, J., Røhne, O. M., Rotondi, A., Sandaker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I. C., Vujanovic, M., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., and Zurlo, N.
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26. The AEgIS experiment at CERN: measuring antihydrogen free-fall in earth’s gravitational field to test WEP with antimatter

Author: Brusa, R S, Amsler, Claude, Ariga, Tomoko, Bonomi, G, Bräunig, P, Cabaret, L, Caccia, M, Caravita, R, Castelli, F, Cerchiari, G, Comparat, D, Consolati, G, Demetrio, A., Di Noto, L, Doser, M, Ereditato, Antonio, Evans, C, Ferragut, R, Fesel, J, Fontana, A, Gerber, S, Giammarchi, M, Gligorova, A, Guatieri, F, Haider, S, Holmestad, H, Huse, T, Kellerbauer, A, Krasnický, D, Lagomarsino, V, Lansonneur, P, Lebrun, P, Malbrunot, C, Mariazzi, S, Matveev, V, Mazzotta, Z, Nebbia, G, Nedelec, P, Oberthaler, M, Pacifico, N, Pagano, D, Penasa, L, Petracek, V, Pistillo, C, Prelz, F, Prevedelli, M, Ravelli, L, Rienaecker, B, Røhne, O M, Rotondi, A, Sacerdoti, M, Sandaker, H, Santoro, R, Scampoli, Paola, Smestad, L, Sorrentino, F, Strojek, I M, Testera, G, Tietje, I C, Vamosi, S, Widmann, E, Yzombard, P, Zmeskal, J, and Zurlo, N
Subjects: 530 Physics, 7. Clean energy

27. The DAQ system for the AEḡIS experiment

Author: Patrick Nedelec, Z. Mazzotta, Tomoko Ariga, F. Sorrentino, Paola Scampoli, Johann Zmeskal, Alban Kellerbauer, Claude Amsler, P. Lansonneur, Antonio Ereditato, J. Robert, G. Nebbia, F. Prelz, Giovanni Consolati, Andrea Fontana, Germano Bonomi, B. Rienaecker, Heidi Sandaker, Chloé Malbrunot, Fabrizio Castelli, N. Pacifico, P. Lebrun, Michael Doser, Luca Penasa, M. Sacerdoti, Daniel Comparat, M. C. Simon, Marco Prevedelli, Sebastiano Mariazzi, I. C. Tietje, H. Holmestad, L. Ravelli, L. Di Noto, D. Krasnický, A. Demetrio, Stefano Aghion, Marco Giammarchi, C. Evans, Sebastian Gerber, Davide Pagano, Alberto Rotondi, M. Oberthaler, G. Testera, Angela Gligorova, Giovanni Cerchiari, C. Zimmer, Eberhard Widmann, F. Guatieri, A. Hinterberger, V. Lagomarsino, P. Yzombard, Rafael Ferragut, S. Haider, Ruggero Caravita, Ole Røhne, L. Smestad, R. S. Brusa, Massimo Caccia, V. Petráček, S.R. Müller, Romualdo Santoro, J. Fesel, Viktor Matveev, Nicola Zurlo, Prelz, F, Aghion, S, Amsler, C, Ariga, T, Bonomi, G, Brusa, R. S, Caccia, M, Caravita, R, Castelli, F, Cerchiari, G, Comparat, D, Consolati, G, Demetrio, A, Di Noto, L, Doser, M, Ereditato, A, Evans, C, Ferragut, R, Fesel, J, Fontana, A, Gerber, S, Giammarchi, M, Gligorova, A, Guatieri, F, Haider, S, Hinterberger, A, Holmestad, H, Kellerbauer, A, Krasnický, D, Lagomarsino, V, Lansonneur, P, Lebrun, P, Malbrunot, C, Mariazzi, S, Matveev, V, Mazzotta, Z, Müller, S. R, Nebbia, G, Nedelec, P, Oberthaler, M, Pacifico, N, Pagano, D, Penasa, L, Petracek, V, Prevedelli, Marco, Ravelli, L, Rienaecker, B, Robert, J, Røhne, O. M, Rotondi, A, Sacerdoti, M, Sandaker, H, Santoro, R, Scampoli, P, Simon, M, Smestad, L, Sorrentino, F, Testera, G, Tietje, I. C, Widmann, E, Yzombard, P, Zimmer, C, Zmeskal, J, Zurlo, N., Prelz, F., Aghion, S., Amsler, C., Ariga, T., Bonomi, G., Brusa, R. S., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Müller, S. R., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Prevedelli, M., Ravelli, L., Rienaecker, B., Robert, J., Rohne, O. M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Simon, M., Smestad, L., Sorrentino, F., Testera, G., Tietje, I. C., Widmann, E., Yzombard, P., Zimmer, C., and Zmeskal, J.
Subjects: 0301 basic medicine, History, Data collection, Multicast, 530 Physics, data acquisition, Detector, 02 engineering and technology, 021001 nanoscience & nanotechnology, computer.software_genre, Data type, Computer Science Applications, Education, 03 medical and health sciences, Physics and Astronomy (all), 030104 developmental biology, Data acquisition, Data logger, Operating system, Software system, 0210 nano-technology, Representation (mathematics), computer
Abstract: In the sociology of small- to mid-sized (O(100) collaborators) experiments the issue of data collection and storage is sometimes felt as a residual problem for which well-established solutions are known. Still, the DAQ system can be one of the few forces that drive towards the integration of otherwise loosely coupled detector systems. As such it may be hard to complete with off-the-shelf components only. LabVIEW and ROOT are the (only) two software systems that were assumed to be familiar enough to all collaborators of the AEḡIS (AD6) experiment at CERN: working out of the GXML representation of LabVIEW Data types, a semantically equivalent representation as ROOT TTrees was developed for permanent storage and analysis. All data in the experiment is cast into this common format and can be produced and consumed on both systems and transferred over TCP and/or multicast over UDP for immediate sharing over the experiment LAN. We describe the setup that has been able to cater to all run data logging and long term monitoring needs of the AEḡIS experiment so far.
Published: 2017
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28. Testing the Weak Equivalence Principle with an antimatter beam at CERN

Author: L. Ravelli, Patrick Nedelec, Davide Pagano, N. Pacifico, Sebastiano Mariazzi, Jiro Kawada, L. Di Noto, Johann Zmeskal, Luca Penasa, I. M. Strojek, S. Rosenberger, Massimo Caccia, Eberhard Widmann, V. Lagomarsino, Giovanni Consolati, H. Derking, Germano Bonomi, M. Sacerdoti, S. Haider, Romualdo Santoro, M. Subieta, Roberto S. Brusa, Ole Røhne, Paola Scampoli, James William Storey, M. Spacek, V. Petracek, M. Kimura, Marco Prevedelli, Claude Amsler, K. Chlouba, Alberto Rotondi, Tomoko Ariga, F. Prelz, D. Krasnicky, A. Demetrio, Heidi Sandaker, Alexey Dudarev, Giovanni Cerchiari, M. Oberthaler, Daniel Comparat, Adriano Fontana, Angela Gligorova, Chloé Malbrunot, L. Cabaret, P. Yzombard, Marco Giammarchi, Antonio Ereditato, T. Huse, Cristina Riccardi, G. Testera, J. Bremer, Z. Mazzotta, Simone Cialdi, Sandra Zavatarelli, E. Jordan, Felice Sorrentino, Alban Kellerbauer, A. S. Belov, Akitaka Ariga, Fabrizio Castelli, Michael Doser, H. Holmestad, Sebastian Gerber, P. Bräunig, S. N. Gninenko, C. Pistillo, Ruggero Caravita, Stefano Aghion, V. A. Matveev, Sebastian Lehner, Rafael Ferragut, G. Nebbia, Kimura, M, Aghion, S, Amsler, C, Ariga, A, Ariga, T, Belov, A, Bonomi, G, Bräunig, P, Bremer, J, Brusa, R S, Cabaret, L, Caccia, M, Caravita, R, Castelli, F, Cerchiari, G, Chlouba, K, Cialdi, S, Comparat, D, Consolati, G, Demetrio, A, Derking, H, Noto, L Di, Doser, M, Dudarev, A, Ereditato, A, Ferragut, R, Fontana, A, Gerber, S, Giammarchi, M, Gligorova, A, Gninenko, S, Haider, S, Holmestad, H, Huse, T, Jordan, E J, Kawada, J, Kellerbauer, A, Krasnicky, D, Lagomarsino, V, Lehner, S, Malbrunot, C, Mariazzi, S, Matveev, V, Mazzotta, Z, Nebbia, G, Nedelec, P, Oberthaler, M, Pacifico, N, Pagano, D, Penasa, L, Petracek, V, Pistillo, C, Prelz, F, Prevedelli, M, Ravelli, L, Riccardi, C, Røhne, O M, Rosenberger, S, Rotondi, A, Sacerdoti, M, Sandaker, H, Santoro, R, Scampoli, P, Sorrentino, F, Spacek, M, Strojek, I M, Storey, J, Subieta, M, Testera, G, Widmann, E, Yzombard, P, Zavatarelli, S, Zmeskal, J, Kimura, M., Aghion, S., Amsler, C., Ariga, A., Ariga, T., Belov, A., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R. S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Derking, H., Noto, L. Di, Doser, M., Dudarev, A., Ereditato, A., Ferragut, R., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Haider, S., Holmestad, H., Huse, T., Jordan, E. J., Kawada, J., Kellerbauer, A., Krasnicky, D., Lagomarsino, V., Lehner, S., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Riccardi, C., Røhne, O. M., Rosenberger, S., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, Paola, Sorrentino, F., Spacek, M., Strojek, I. M., Storey, J., Subieta, M., Testera, G., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and AEGIS
Subjects: Photographic emulsions, Atoms, History, Particle physics, Physics::General Physics, 530 Physics, Nuclear emulsions, Gravitational acceleration, 7. Clean energy, Education, Nuclear physics, Physics and Astronomy (all), Positron, NUCLEAR-EMULSIONS, Gravitational accelerations, Physics and Astronomy (all), NUCLEAR-EMULSIONS, AEGIS EXPERIMENT, ANTIPROTONS, POSITRONIUM, SYSTEM, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Atomic and Molecular Clusters, Vertical displacements, Nuclear emulsion, Physics::Atomic Physics, particle physics, gravity, Antihydrogen, Gravitational forces, Stark accelerator, Physics, Large Hadron Collider, Emulsification, Tracking (position), Antihydrogen atoms, Fundamental laws, Weak equivalence principle, Detector, Computer Science Applications, Antiproton, Antimatter, Physics::Accelerator Physics, Particle Physics - Experiment
Abstract: International audience; The goal of the AEgIS experiment is to measure the gravitational acceleration of antihydrogen ? the simplest atom consisting entirely of antimatter ? with the ultimate precision of 1%. We plan to verify the Weak Equivalence Principle (WEP), one of the fundamental laws of nature, with an antimatter beam. The experiment consists of a positron accumulator, an antiproton trap and a Stark accelerator in a solenoidal magnetic field to form and accelerate a pulsed beam of antihydrogen atoms towards a free-fall detector. The antihydrogen beam passes through a moir? deflectometer to measure the vertical displacement due to the gravitational force. A position and time sensitive hybrid detector registers the annihilation points of the antihydrogen atoms and their time-of-flight. The detection principle has been successfully tested with antiprotons and a miniature moir? deflectometer coupled to a nuclear emulsion detector.
Published: 2015
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29. Gravity and antimatter: The AEgIS experiment at CERN

Author: A. Hinterberger, L. Smestad, G. Nebbia, G. Testera, Marco Prevedelli, Marco Giammarchi, J. Robert, Nicola Pacifico, I. C. Tietje, Luca Penasa, Johann Marton, Fabrizio Castelli, Fiodor Sorrentino, Z. Mazzotta, P. Lebrun, Michael Doser, Alban Kellerbauer, Rafael Ferragut, Victor Matveev, Heidi Sandaker, Nicola Zurlo, L. Ravelli, O. Khalidova, S. Haider, Davide Pagano, Giovanni Consolati, Germano Bonomi, C. Zimmer, H. Holmestad, Sebastiano Mariazzi, Ole Røhne, M. Oberthaler, Angela Gligorova, Stefano Aghion, Chloé Malbrunot, Sebastian Gerber, S.R. Müller, Ruggero Caravita, Patrick Nedelec, Johann Zmeskal, F. Guatieri, Romualdo Santoro, P. Yzombard, Alberto Rotondi, J. Fesel, Eberhard Widmann, P. Lansonneur, V. Lagomarsino, B. Rienaecker, L. Di Noto, Claude Amsler, Massimo Caccia, Daniel Comparat, Giovanni Cerchiari, D. Krasnický, A. Demetrio, F. Prelz, Roberto S. Brusa, V. Petracek, M. Fanì, A. Evans, Adriano Fontana, Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Pagano D., Aghion S., Amsler C., Bonomi G., Brusa R.S., Caccia M., Caravita R., Castelli F., Cerchiari G., Comparat D., Consolati G., Demetrio A., Noto L.D., Doser M., Evans A., Fani M., Ferragut R., Fesel J., Fontana A., Gerber S., Giammarchi M., Gligorova A., Guatieri F., Haider S., Hinterberger A., Holmestad H., Kellerbauer A., Khalidova O., Krasnicky D., Lagomarsino V., Lansonneur P., Lebrun P., Malbrunot C., Mariazzi S., Marton J., Matveev V., Mazzotta Z., Muller S.R., Nebbia G., Nedelec P., Oberthaler M., Pacifico N., Penasa L., Petracek V., Prelz F., Prevedelli M., Ravelli L., Rienaecker B., Robert J., Rohne O.M., Rotondi A., Sandaker H., Santoro R., Smestad L., Sorrentino F., Testera G., Tietje I.C., Widmann E., Yzombard P., Zimmer C., Zmeskal J., and Zurlo N.
Subjects: History, Particle physics, Physics::General Physics, experimental methods, CERN Lab, General relativity, Measure (physics), 01 natural sciences, Education, Gravitational field, 0103 physical sciences, Physics::Atomic and Molecular Clusters, general relativity, antimatter, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Equivalence principle, 010306 general physics, Antihydrogen, Physics, antihydrogen, Large Hadron Collider, General Relativity and Cosmology, 010308 nuclear & particles physics, atom, gravitation: interaction, Computer Science Applications, experimental equipment, equivalence principle, Antimatter, force: gravitation, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], gravity, antimatter, Particle Physics - Experiment, Beam (structure), experimental results
Abstract: From the experimental point of view, very little is known about the gravitational interaction between matter and antimatter. In particular, the Weak Equivalence Principle, which is of paramount importance for the General Relativity, has not yet been directly probed with antimatter. The main goal of the AEgIS experiment at CERN is to perform a direct measurement of the gravitational force on antimatter. The idea is to measure the vertical displacement of a beam of cold antihydrogen atoms, traveling in the gravitational field of the Earth, by the means of a moiré deflectometer. An overview of the physics goals of the experiment, of its apparatus and of the first results is presented.
Published: 2020
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30. Positronium Rydberg excitation diagnostic in a 1T cryogenic environment

Author: Ole Røhne, Johann Marton, Chloé Malbrunot, B. Rienaecker, Davide Pagano, P. Hackstock, M. Fanì, Giovanni Consolati, Germano Bonomi, S. Müller, R. S. Brusa, M. Vujanovic, A. Camper, G. Nebbia, S. Haider, V. Matveev, Patrick Nedelec, Sebastiano Mariazzi, Johann Zmeskal, C. Zimmer, A. Hinterberger, Ruggero Caravita, E. Widmann, A. S. Belov, O. Khalidova, Marco Giammarchi, Marco Prevedelli, M. Antonello, Lillian Smestad, I. C. Tietje, Fabrizio Castelli, Stefano Aghion, Alban Kellerbauer, Romualdo Santoro, Michael Doser, Claude Amsler, Ph. Lebrun, H. Holmestad, Rafael Ferragut, M. Oberthaler, G. Testera, Angela Gligorova, F. Prelz, J. Robert, P. Yzombard, Felice Sorrentino, Nicola Zurlo, Daniel Comparat, D. Krasnický, A. Demetrio, C. Evans, Andrea Fontana, Giovanni Cerchiari, Massimo Caccia, Luca Penasa, Heidi Sandaker, V. Petráček, Alberto Rotondi, L. Di Noto, Sebastian Gerber, F. Guatieri, P. Lansonneur, V. Lagomarsino, J. Fesel, Caravita R., Mariazzi S., Aghion S., Amsler C., Antonello M., Belov A., Bonomi G., Brusa R.S., Caccia M., Camper A., Castelli F., Cerchiari G., Comparat D., Consolati G., Demetrio A., Di Noto L., Doser M., Evans C., Fani M., Ferragut R., Fesel J., Fontana A., Gerber S., Giammarchi M., Gligorova A., Guatieri F., Hackstock P., Haider S., Hinterberger A., Holmestad H., Kellerbauer A., Khalidova O., Krasnicky D., Lagomarsino V., Lansonneur P., Lebrun P., Malbrunot C., Marton J., Matveev V., Muller S.R., Nebbia G., Nedelec P., Oberthaler M., Pagano D., Penasa L., Petracek V., Prelz F., Prevedelli M., Rienaecker B., Robert J., Rohne O.M., Rotondi A., Sandaker H., Santoro R., Smestad L., Sorrentino F., Testera G., Tietje I.C., Vujanovic M., Widmann E., Yzombard P., Zimmer C., Zmeskal J., and Zurlo N.
Subjects: positronium, spectroscopy, Materials science, Laser, Positronium, law.invention, symbols.namesake, law, Antimatter, Field desorption, Rydberg formula, symbols, Physics::Atomic Physics, Atomic physics, Spectroscopy, Antihydrogen, Excitation
Abstract: Forming a pulsed beam of cold antihydrogen using charge-exchange with Rydberg positronium (Ps) is the goal of the AEgIS collaboration, which aims to a first gravity measurement on neutral antimatter. Recently achieved results in Ps formation and laser spectroscopy in the main AEgIS apparatus are summarized. First, Ps has been produced using nanochanneled silicon targets in a cryogenic environment (~ 15 K) with 1 T magnetic field and observed by means of Single-Shot Positron Annihilation Lifetime Spectroscopy. The first demonstration of Ps n=3 excitation has been obtained as well using the same technique, validating the proof-of-concept of AEgIS. Subsequently, a new fast and high sensitivity detection method for laser-excited Ps in high magnetic field has been developed, using the combination of laser/field ionization and an high sensitivity MCP detector coupled to a low-noise CMOS camera. This technique will form the basis of future experiments involving Rydberg Ps spectroscopy in AEgIS.
Published: 2019

31. Production of long-lived positronium states via laser excitation to 33P level

Author: A. Camper, Sebastian Gerber, J. Fesel, R. S. Brusa, F. Guatieri, P. Lansonneur, Romualdo Santoro, M. Oberthaler, G. Testera, Angela Gligorova, E. Widmann, O. M. Roehne, S. R. Mueller, Luca Penasa, B. Rienaecker, Stefano Aghion, Ph. Lebrun, H. Holmestad, F. Prelz, L. Di Noto, Claude Amsler, Felice Sorrentino, D. Krasnicky, Marco Prevedelli, M. Antonello, Daniel Comparat, Chloé Malbrunot, Rafael Ferragut, J. Robert, Andrea Fontana, I. C. Tietje, Massimo Caccia, Fabrizio Castelli, Michael Doser, V. Petráček, P. Hackstock, Marco Giammarchi, G. Nebbia, Giovanni Cerchiari, S. Haider, Davide Pagano, C. Zimmer, V. Matveev, O. Khalidova, Alban Kellerbauer, Alberto Rotondi, A. Hinterberger, V. Lagomarsino, A. S. Belov, Lillian Smestad, A. Demetrio, Patrick Nedelec, Sebastiano Mariazzi, M. Fanì, C. Evans, Ruggero Caravita, Giovanni Consolati, Germano Bonomi, P. Yzombard, Heidi Sandaker, Nicola Zurlo, Mariazzi S., Caravita R., Aghion S., Amsler C., Antonello M., Belov A., Bonomi G., Brusa R.S., Caccia M., Camper A., Castelli F., Cerchiari G., Comparat D., Consolati G., Demetrio A., Di Noto L., Doser M., Evans C., Fani M., Ferragut R., Fesel J., Fontana A., Gerber S., Giammarchi M., Gligorova A., Guatieri F., Hackstock P., Haider S., Hinterberger A., Holmestad H., Kellerbauer A., Khalidova O., Krasnicky D., Lagomarsino V., Lansonneur P., Lebrun P., Malbrunot C., Matveev V., Mueller S.R., Nebbia G., Nedelec P., Oberthaler M., Pagano D., Penasa L., Petracek V., Prelz F., Prevedelli M., Rienaecker B., Robert J., Roehne O.M., Rotondi A., Sandaker H., Santoro R., Smestad L., Sorrentino F., Testera G., Tietje I.C., Widmann E., Yzombard P., Zimmer C., and Zurlo N.
Subjects: positronium, spectroscopy, Physics, Laser, 01 natural sciences, 010305 fluids & plasmas, Positronium, law.invention, Interferometry, symbols.namesake, law, Metastability, 0103 physical sciences, Rydberg formula, symbols, Intermediate state, Atomic physics, 010306 general physics, Ground state, Excitation
Abstract: The 33P state of positronium is an intermediate level suitable for producing long-lived positronium states. On one hand, it can be used in a two-step laser excitation scheme from the ground state to Rydberg levels. On the other hand, excitation of positronium to 33P level is a simple pathway for producing metastable 23S positronium atoms by spontaneous radiactive decay. In this work, experiments showing the production of such long-lived levels, using the 33P state as intermediate state, are presented. The characteristics of the two long-lived levels, in view of experiments of deflectometry/interferometry with positronium, are discussed.The 33P state of positronium is an intermediate level suitable for producing long-lived positronium states. On one hand, it can be used in a two-step laser excitation scheme from the ground state to Rydberg levels. On the other hand, excitation of positronium to 33P level is a simple pathway for producing metastable 23S positronium atoms by spontaneous radiactive decay. In this work, experiments showing the production of such long-lived levels, using the 33P state as intermediate state, are presented. The characteristics of the two long-lived levels, in view of experiments of deflectometry/interferometry with positronium, are discussed.
Published: 2019

32. Antiproton tagging and vertex fitting in a Timepix3 detector

Author: Johann Zmeskal, L. Di Noto, Sebastian Gerber, P. Lansonneur, D. Pagano, V. Petracek, V. N. Matveev, F. Guatieri, C. Malbrunot, O. Khalidova, Ruggero Caravita, A. Rotondi, H. Holmestad, A. S. Belov, R. S. Brusa, Daniel Comparat, A. Gligorova, Massimo Caccia, A. Kellerbauer, Giovanni Cerchiari, Marco Prevedelli, M. Antonello, Heidi Sandaker, I. C. Tietje, F. Sorrentino, G. Bonomi, A. Camper, G. Testera, Claude Amsler, P. Nedelec, M. Doser, Fabrizio Castelli, Ph. Hackstock, F. Prelz, A. Hinterberger, Marco Giammarchi, S. Haider, S.R. Müller, J. Robert, A. Demetrio, L. Smestad, C. Evans, S. Aghion, N. Zurlo, G. Nebbia, Luca Penasa, P. Yzombard, A. Fontana, C. Zimmer, M. Fanì, Romualdo Santoro, S. Mariazzi, J. Fesel, J. Marton, P. Lebrun, V. Lagomarsino, Ole Røhne, Giovanni Consolati, D. Krasnický, Markus K. Oberthaler, B. Rienaecker, E. Widmann, Rafael Ferragut, Nicola Pacifico, Laboratoire Aimé Cotton (LAC), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), AEgIS, Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Aghion, S., Amsler, C., Antonello, M., Belov, A., Bonomi, G., Brusa, R.S., Caccia, M., Camper, A., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Noto, L. Di, Doser, M., Evans, C., Fanì, M., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Hackstock, Ph., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Marton, J., Matveev, V., Müller, S.R., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienaecker, B., Robert, J., Røhne, O.M., Rotondi, A., Sandaker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I.C., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., and Zurlo, N.
Subjects: Vertex (graph theory), Physics::Instrumentation and Detectors, 01 natural sciences, Particle identification methods, Physics::Atomic Physics, Detectors and Experimental Techniques, Nuclear Experiment, Instrumentation, Image resolution, Mathematical Physics, media_common, Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc), Physics, Detector, Simulation methods and program, Hybrid detectors, Simulation methods and programs, interac- tion of photons with matter, interaction of photons with matter, Detector modelling and simulations I, interaction of hadrons with matter, force: gravitation, readout, asymmetry, Particle physics, Physics::General Physics, CERN Lab, media_common.quotation_subject, antihydrogen: annihilation, Detector modelling and simulations I (interaction of radiation with matter, Asymmetry, anti-p p: annihilation, Particle identification method, 0103 physical sciences, detector: pixel, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Antihydrogen, spatial resolution, etc), antihydrogen, detector: position sensitive, 010308 nuclear & particles physics, Hybrid detector, interaction of radiation with matter, efficiency, Antiproton, High Energy Physics::Experiment
Abstract: International audience; Studies of antimatter are important for understanding our universe at a fundamental level. There are still unsolved problems, such as the matter-antimatter asymmetry in the universe. The AEgIS experiment at CERN aims at measuring the gravitational fall of antihydrogen in order to determine the gravitational force on antimatter. The proposed method will make use of a position-sensitive detector to measure the annihilation point of antihydrogen. Such a detector must be able to tag the antiproton, measure its time of arrival and reconstruct its annihilation point with high precision in the vertical direction. This work explores a new method for tagging antiprotons and reconstructing their annihilation point. Antiprotons from the Antiproton Decelerator at CERN were used to obtain data on direct annihilations on the surface of a silicon pixel sensor with Timepix3 readout. These data were used to develop and verify a detector response model for annihilation of antiprotons in this detector. Using this model and the antiproton data it is shown that a tagging efficiency of 50± 10% and a vertical position resolution of 22 ± 0.5 μm can be obtained.
Published: 2018
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33. Measurement of antiproton annihilation on Cu, Ag and Au with emulsion films

Author: Ole Røhne, M. Sacerdoti, D. Krasnicky, Marco Prevedelli, Daniel Comparat, I. C. Tietje, Patrick Nedelec, A. Hinterberger, Akitaka Ariga, Johann Zmeskal, V. Lagomarsino, Rafael Ferragut, V. Matveev, Z. Mazzotta, C. Pistillo, Roberto S. Brusa, J. Fesel, P. Bräunig, S. Vamosi, Nicola Pacifico, Alban Kellerbauer, Ruggero Caravita, V. Petracek, L. Ravelli, G. Nebbia, L. Cabaret, Paola Scampoli, Davide Pagano, Giovanni Consolati, Germano Bonomi, T. Huse, F. Prelz, Heidi Sandaker, Massimo Caccia, B. Rienaecker, Claude Amsler, C. Zimmer, Sebastiano Mariazzi, E. Widmann, M. Oberthaler, Angela Gligorova, Michal Simon, Sebastian Gerber, Jiro Kawada, S. Müller, Alberto Rotondi, L. Di Noto, Adriano Fontana, Chloé Malbrunot, F. Guatieri, M. Vladymyrov, P. Yzombard, P. Lansonneur, Ph. Lebrun, H. Holmestad, S. Haider, Tomoko Ariga, Stefano Aghion, Antonio Ereditato, Marco Giammarchi, Lillian Smestad, Felice Sorrentino, G. Testera, Fabrizio Castelli, Michael Doser, Giovanni Cerchiari, M. Kimura, A. Demetrio, C. Evans, Nicola Zurlo, Luca Penasa, Romualdo Santoro, Aghion, S., Amsler, C., Ariga, A., Ariga, T., Bonomi, G., Bräunig, P., Brusa, R.S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Noto, L. Di, Doser, M., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Hinterberger, A., Holmestad, H., Huse, T., Kawada, J., Kellerbauer, A., Kimura, M., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Müller, S.R., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Rienaecker, B., Røhne, O.M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Simon, M., Smestad, L., Sorrentino, F., Testera, G., Tietje, I.C., Vamosi, S., Vladymyrov, M., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., Zurlo, N., Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Brusa, R. S., Müller, S. R., Røhne, O. M., Scampoli, Paola, and Tietje, I. C.
Subjects: Particle physics, Physics - Instrumentation and Detectors, 530 Physics, Monte Carlo method, Detector modelling and simulations I (interaction of radiation with matter, FOS: Physical sciences, interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, Particle tracking detectors, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), emulsion detectors, 0103 physical sciences, antimatter, free fall, Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc), Particle tracking detectors (Solidstate detectors), Instrumentation, Mathematical Physics, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, 010306 general physics, Nuclear Experiment, Particle tracking detectors (Solid- state detectors), physics.ins-det, detectors, antiproton annihilation, etc), antihydrogen, Physics, Large Hadron Collider, Annihilation, 010308 nuclear & particles physics, hep-ex, emulsion detectors, antiproton annihilation, antimatter, free fall, antimatter, antihydrogen, detectors, antiprotons, interaction of photons with matter, Instrumentation and Detectors (physics.ins-det), Hadronization, Antiproton Decelerator, interaction of hadrons with matter, Beamline, Antiproton, Particle, Physics::Accelerator Physics, High Energy Physics::Experiment, antiprotons, Particle Physics - Experiment
Abstract: The characteristics of low energy antiproton annihilations on nuclei (e.g. hadronization and product multiplicities) are not well known, and Monte Carlo simulation packages that use different models provide different descriptions of the annihilation events. In this study, we measured the particle multiplicities resulting from antiproton annihilations on nuclei. The results were compared with predictions obtained using different models in the simulation tools GEANT4 and FLUKA. For this study, we exposed thin targets (Cu, Ag and Au) to a very low energy antiproton beam from CERN's Antiproton Decelerator, exploiting the secondary beamline available in the AEgIS experimental zone. The antiproton annihilation products were detected using emulsion films developed at the Laboratory of High Energy Physics in Bern, where they were analysed at the automatic microscope facility. The fragment multiplicity measured in this study is in good agreement with results obtained with FLUKA simulations for both minimally and heavily ionizing particles. The characteristics of low energy antiproton annihilations on nuclei (e.g. hadronization and product multiplicities) are not well known, and Monte Carlo simulation packages that use different models provide different descriptions of the annihilation events. In this study, we measured the particle multiplicities resulting from antiproton annihilations on nuclei. The results were compared with predictions obtained using different models in the simulation tools GEANT4 and FLUKA. For this study, we exposed thin targets (Cu, Ag and Au) to a very low energy antiproton beam from CERN's Antiproton Decelerator, exploiting the secondary beamline available in the AEgIS experimental zone. The antiproton annihilation products were detected using emulsion films developed at the Laboratory of High Energy Physics in Bern, where they were analysed at the automatic microscope facility. The fragment multiplicity measured in this study is in good agreement with results obtained with FLUKA simulations for both minimally and heavily ionizing particles.
Published: 2017
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34. The AEgIS experiment at CERN: Measuring antihydrogen free-fall in earth's gravitational field to test WEP with antimatter

Author: Daniel Comparat, P. Lebrun, Heidi Sandaker, L. Ravelli, Davide Pagano, Alberto Rotondi, G. Testera, S. Haider, Tomoko Ariga, Antonio Ereditato, F. Prelz, Rafael Ferragut, Fabrizio Castelli, Michael Doser, Sebastian Gerber, Paola Scampoli, F. Guatieri, Claude Amsler, H. Holmestad, P. Lansonneur, Felice Sorrentino, Giovanni Consolati, Germano Bonomi, M. Oberthaler, M. Sacerdoti, Angela Gligorova, Marco Prevedelli, P. Yzombard, I. C. Tietje, Nicola Zurlo, L. Cabaret, Patrick Nedelec, Johann Zmeskal, T. Huse, G. Nebbia, Adriano Fontana, Sebastiano Mariazzi, B. Rienaecker, N. Pacifico, Luca Penasa, Roberto S. Brusa, S. Vamosi, V. Petracek, C. Pistillo, Ruggero Caravita, Marco Giammarchi, Z. Mazzotta, Alban Kellerbauer, V. A. Matveev, Eberhard Widmann, V. Lagomarsino, L. Di Noto, Massimo Caccia, I. M. Strojek, Ole Røhne, Giovanni Cerchiari, P. Bräunig, D. Krasnický, A. Demetrio, C. Evans, J. Fesel, Chloé Malbrunot, L. Smestad, Romualdo Santoro, Brusa, R. S, Amsler, C, Ariga, T, Bonomi, G, Bräunig, P, Cabaret, L, Caccia, M, Caravita, R, Castelli, F, Cerchiari, G, Comparat, D, Consolati, G, Demetrio, A., Di Noto, L, Doser, M, Ereditato, A, Evans, C, Ferragut, R, Fesel, J, Fontana, A, Gerber, S, Giammarchi, M, Gligorova, A, Guatieri, F, Haider, S, Holmestad, H, Huse, T, Kellerbauer, A, Krasnický, D, Lagomarsino, V, Lansonneur, P, Lebrun, P, Malbrunot, C, Mariazzi, S, Matveev, V, Mazzotta, Z, Nebbia, G, Nedelec, P, Oberthaler, M, Pacifico, N, Pagano, D, Penasa, L, Petracek, V, Pistillo, C, Prelz, F, Prevedelli, M, Ravelli, L, Rienaecker, B, Røhne, O. M, Rotondi, A, Sacerdoti, M, Sandaker, H, Santoro, R, Scampoli, Paola, Smestad, L, Sorrentino, F, Strojek, I. M, Testera, G, Tietje, I. C, Vamosi, S, Widmann, E, Yzombard, P, Zmeskal, J, Zurlo, N., Brusa, R S, Røhne, O M, Scampoli, P, Strojek, I M, Tietje, I C, Zurlo, N, Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Aimé Cotton (LAC), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan)
Subjects: History, Physics::General Physics, CERN Lab, 530 Physics, deflection, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], antihydrogen: beam, 7. Clean energy, 01 natural sciences, Education, Nuclear physics, Physics and Astronomy (all), Gravitational field, positron: capture, anti-p: capture, 0103 physical sciences, excited state, antimatter, Physics::Atomic Physics, Equivalence principle, 010306 general physics, Antihydrogen, Physics, Large Hadron Collider, 010308 nuclear & particles physics, charge exchange, Computer Science Applications, Antiproton Decelerator, Deflection (physics), equivalence principle, Antiproton, gravitation, Antimatter, Physics::Accelerator Physics, High Energy Physics::Experiment, gravity, antihydrogen
Abstract: International audience; The AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) experiment is designed with the objective to test the weak equivalence principle with antimatter by studying the free fall of antihydrogen in the Earth’s gravitational field. A pulsed cold beam of antihydrogen will be produced by charge exchange between cold Ps excited in Rydberg state and cold antiprotons. Finally the free fall will be measured by a classical moiré deflectometer. The apparatus being assembled at the Antiproton Decelerator at CERN will be described, then the advancements of the experiment will be reported: positrons and antiprotons trapping measurements, Ps two-step excitation and a test-measurement of antiprotons deflection with a small scale moiré deflectometer.
Published: 2017
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35. Characterization of a transmission positron/positronium converter for antihydrogen production

Author: Victor Matveev, Paola Scampoli, Tomoko Ariga, Ulrik I. Uggerhøj, S. Haider, Claude Amsler, S.R. Müller, G. Nebbia, J. Fesel, Ole Røhne, B. Rienäcker, Roberto S. Brusa, Z. Mazzotta, G. Testera, Eberhard Widmann, Rafael Ferragut, V. Petracek, Giovanni Cerchiari, Felice Sorrentino, Romualdo Santoro, V. Lagomarsino, Alban Kellerbauer, L. Resch, S.L. Andersen, N. Pacifico, Luca Penasa, F. Lyckegaard, F. Prelz, Fabrizio Castelli, Stefano Aghion, J. Robert, D. Krasnický, A. Demetrio, Sebastiano Mariazzi, C. Evans, L. Ravelli, L. Di Noto, Michael Doser, Ruggero Caravita, Davide Pagano, P. Lebrun, C. Zimmer, Giovanni Consolati, Jacques Chevallier, Germano Bonomi, P. Lansonneur, Massimo Caccia, Sebastian Gerber, Marco Giammarchi, Daniel Comparat, Heidi Sandaker, Antonio Ereditato, M. Sacerdoti, M. C. Simon, F. Guatieri, Nicola Zurlo, Marco Prevedelli, H. Holmestad, L. Povolo, Chloé Malbrunot, I. C. Tietje, Adriano Fontana, Alberto Rotondi, A. Hinterberger, L. Smestad, Patrick Nedelec, Johann Zmeskal, M. Oberthaler, Angela Gligorova, P. Yzombard, Université Paris-Sud - Paris 11 (UP11), Laboratoire Aimé Cotton (LAC), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Aghion, S., Amsler, C., Ariga, T., Bonomi, G., Brusa, R.S., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Müller, S.R., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Povolo, L., Prelz, F., Prevedelli, M., Ravelli, L., Resch, L., Rienäcker, B., Robert, J., Røhne, O.M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Simon, M., Smestad, L., Sorrentino, F., Testera, G., Tietje, I.C., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., Zurlo, N., Andersen, S.L., Chevallier, J., Uggerhøj, U.I., Lyckegaard, F., Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Brusa, R. S., Müller, S. R., Røhne, O. M., Scampoli, Paola, Tietje, I. C., Andersen, S. L., and Uggerhøj, U. I.
Subjects: Photomultiplier, COLLISIONS, Positronium, Transmission, Antihydrogen, Nuclear and High Energy Physics, GRAPHITE, Astrophysics::High Energy Astrophysical Phenomena, BEAM, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Kinetic energy, Positronium, 01 natural sciences, Secondary electrons, 010305 fluids & plasmas, SECONDARY-ELECTRON EMISSION, Positron, POSITRON-ANNIHILATION, THIN-FILMS, 0103 physical sciences, Transmission, Antihydrogen, mesa-structured silica, 010306 general physics, COLD, Instrumentation, Physics, PLASMA, Scattering, SURFACES, positronium, mesa-structured silica, TRANSPORT, Time of flight, Physics::Accelerator Physics, Atomic physics
Abstract: In this work a characterization study of forward emission from a thin, meso-structured silica Received 17 March 2017 positron/positronium (Ps) converter following implantation of positrons in light of possible antihydrogen production is presented. The target consisted of a similar to 1 mu m thick ultraporous silica film e-gun evaporated onto a 20 nm carbon foil. The Ps formation and emission was studied via Single Shot Positron Annihilation Lifetime Spectroscopy measurements after implantation of pulses with 3 4.10(7) positrons and 10 ns temporal width. The forward emission of implanted positrons and secondary electrons was investigated with a micro-channel plate phosphor screen assembly, connected either to a CCD camera for imaging of the impinging particles, or to a fast photomultiplier tube to extract information about their time of flight. The maximum Ps formation fraction was estimated to be similar to 10%. At least 10% of the positrons implanted with an energy of 3.3 keV are forward-emitted with a scattering angle smaller than 50 and maximum kinetic energy of 1.2 keV. At least 0.1-0.2 secondary electrons per implanted positron were also found to be forward-emitted with a kinetic energy of a few eV. The possible application of this kind of positron/positronium converter for antihydrogen production is discussed. (C) 2017 Elsevier B.V. All rights reserved.
Published: 2017
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36. Overview of Recent Work on Laser Excitation of Positronium for the Formation of Antihydrogen

Author: J. Fesel, P. Yzombard, Z. Mazzotta, Giovanni Cerchiari, Alban Kellerbauer, Romualdo Santoro, G. Nebbia, Matveev, P. Bräunig, Alberto Rotondi, Andrea Fontana, Antonio Ereditato, Lagomarsino, Sebastiano Mariazzi, Giovanni Consolati, Germano Bonomi, Ole Røhne, L. Ravelli, Ph. Lebrun, H. Holmestad, Massimo Caccia, M. Sacerdoti, Lillian Smestad, D. Krasnický, A. Demetrio, L. Cabaret, Marco Prevedelli, Davide Pagano, Marco Giammarchi, C. Evans, Heidi Sandaker, Felice Sorrentino, I. C. Tietje, T. Huse, M. Oberthaler, I. M. Strojek, G. Testera, Angela Gligorova, S. Haider, Petracek, L. Di Noto, Patrick Nedelec, Nicola Zurlo, Fabrizio Castelli, Johann Zmeskal, Tomoko Ariga, Michael Doser, Rafael Ferragut, S. Vamosi, Paola Scampoli, Claude Amsler, Luca Penasa, Nicola Pacifico, Chloé Malbrunot, Sebastian Gerber, F. Guatieri, P. Lansonneur, Daniel Comparat, F. Prelz, B. Rienaecker, C. Pistillo, Ruggero Caravita, R. S. Brusa, E. Widmann, Laboratoire Aimé Cotton (LAC), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Yasuyuki Matsuda, Yzombard, P., Amsler, C., Ariga, T., Bonomi, G., Bräunig, P., Brusa, R. S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Kellerbauer, A., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, Marco, Ravelli, L., Rienaecker, B., Røne, O. M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Smestad, L., Sorrentino, F., Strojek, I. M., Testera, G., Tietje, I. C., Vamosi, S., Widmann, E., Zmeskal, J., Zurlo, N., Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Subjects: Work (thermodynamics), CERN Lab, antihydrogen: beam, Positronium laser cooling, Positronium, 7. Clean energy, 01 natural sciences, 010305 fluids & plasmas, law.invention, laser excitation, Nuclear physics, antihydrogen: formation, Physics in General, law, 0103 physical sciences, Physics::Atomic and Molecular Clusters, Positronium laser excitation, Physics::Atomic Physics, anti-matter, laser excitation, positronium: excited state, 010306 general physics, Antihydrogen, Physics, Positronium, Antihydrogen, Laser-matter interaction, Positronium laser excitation, Positronium laser cooling, anions laser cooling, Condensed Matter::Quantum Gases, anions laser cooling, atom, antihydrogen: production, Laser, charge exchange, [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph], anti-p, laser, Laser-matter interaction, anti-matter, gravitation, Physics::Accelerator Physics, Excitation
Abstract: International audience; The AEgIS experiment carried out at CERN aims to form a cold antihydrogen beam to perform precision studies on gravity. A key ingredient is the creation of antihydrogen via a charge-exchange process between trapped antiprotons and Rydberg excited positronium atoms (Ps). In the present, the latest results of laser excitation of Ps are reviewed, as well as studies on a possible laser manipulation and cooling of Ps and antiprotons.
Published: 2017
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37. Advances in PS manipulations and laser studies in the AEgIS experiment

Author: S. Haider, Johann Marton, Ruggero Caravita, Davide Pagano, S. Müller, J. Robert, G. Nebbia, Nicola Pacifico, Markus K. Oberthaler, J. Fesel, Rafael Ferragut, D. Krasnický, R. S. Brusa, L. Ravelli, Massimo Caccia, Giovanni Consolati, A. Demetrio, C. Zimmer, Patrick Nedelec, Johann Zmeskal, C. Evans, Sebastiano Mariazzi, Felice Sorrentino, B. Rienäcker, V. Petráček, F. Prelz, Marco Giammarchi, L. Di Noto, Giovanni Cerchiari, Heidi Sandaker, E. Widmann, Stefano Aghion, Andrea Fontana, Sebastian Gerber, V. Lagomarsino, A. Hinterberger, V. Matveev, Chloé Malbrunot, Angela Gligorova, Ole Røhne, F. Guatieri, O. Khalidova, Daniel Comparat, P. Lansonneur, Marco Prevedelli, I. C. Tietje, Alberto Rotondi, G. Testera, Lillian Smestad, Luca Penasa, Fabrizio Castelli, Michael Doser, Ph. Lebrun, H. Holmestad, P. Yzombard, Z. Mazzotta, Alban Kellerbauer, Germano Bonomi, Nicola Zurlo, Claude Amsler, Romualdo Santoro, Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Caravita, R., Aghion, S., Amsler, C., Bonomi, G., Brusa, R. S., Caccia, M., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnickã½, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Marton, J., Matveev, V., Mazzottae, Z., Mã¼ller, S. R., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, Marco, Ravelli, L., Rienã¤cker, B., Robert, J., Rã¸hne, O. M., Rotondi, A., Sandaker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., and Zurlo, N.
Subjects: Physics, Antimatter, 010308 nuclear & particles physics, Physics and Astronomy, Positronium formation, 020209 energy, General Physics and Astronomy, Nanotechnology, 02 engineering and technology, Laser, 01 natural sciences, law.invention, Physics and Astronomy (all), Antimatter, Gravity, law, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Physics::Atomic Physics, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques
Abstract: International audience; Positronium (Ps), the unstable bound state of electron and positron, is a valuable system for neutral antimatter spectroscopic studies and for antihydrogen production. Forming a pulsed beam cold antihydrogen using charge-exchange with the Rydberg Ps is the goal of the AEgIS Collaboration, which aims to measure gravity on neutral antimatter. Recent results achieved in producing, manipulating and studying Ps are summarized. Ps has been first produced with mesoporous silica targets in a reflection geometry. Spectroscopy of Ps n = 3 state has been conducted, yielding as a byproduct an independent estimate of the produced Ps temperature. Efficient laser excitation to the Rydberg levels was then achieved, validating the proof-of-concept of AEgIS. Subsequently, production of Ps from a new class of transmission targets was also achieved, opening the possibility for future experiments.
Published: 2017
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38. Probing antimatter gravity – The AEGIS experiment at CERN

Author: Giovanni Consolati, G. Nebbia, Germano Bonomi, Tomoko Ariga, M. Spacek, Antonio Ereditato, Sebastiano Mariazzi, L. Smestad, Romualdo Santoro, L. Cabaret, Z. Mazzotta, Rafael Ferragut, Sandra Zavatarelli, T. Huse, Alban Kellerbauer, M. Oberthaler, Angela Gligorova, Sebastian Lehner, Patrick Nedelec, Johann Zmeskal, P. Lebrun, F. Prelz, C. Pistillo, T. Koettig, J. Liberadzka, Paola Scampoli, L. Ravelli, James William Storey, Ruggero Caravita, M. Kimura, H. Holmestad, V. A. Matveev, Claude Amsler, Marco Giammarchi, Davide Pagano, Felice Sorrentino, P. Lansonneur, Adriano Fontana, P. Yzombard, G. Testera, Daniel Comparat, I. M. Strojek, M. Sacerdoti, Fabrizio Castelli, D. Krasnický, S. Haider, Nicola Zurlo, A. Demetrio, Michael Doser, Marco Prevedelli, C. Evans, I. C. Tietje, Massimo Caccia, K. Chlouba, N. Pacifico, Stefano Aghion, Giovanni Cerchiari, Luca Penasa, Eberhard Widmann, Sebastian Gerber, P. Bräunig, V. Lagomarsino, F. Guatieri, B. Rienäcker, Roberto S. Brusa, Chloé Malbrunot, V. Petracek, Simone Cialdi, E. Jordan, L. Di Noto, J. Fesel, Akitaka Ariga, J. Bremer, Alexey Dudarev, Alberto Rotondi, Heidi Sandaker, Ole Røhne, Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), AEGIS, Bravina, L., Foka Y., Kabana S., Kellerbauer, A., Aghion, S., Amsler, C., Ariga, A., Ariga, T., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R. S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Jordan, E., Kimura, M., Koettig, T., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Lehner, S., Liberadzka, J., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Nebbia, G., Nédélec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petráček, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Rienäcker, B., Røhne, O.M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Smestad, L., Sorrentino, F., Špaček, M., Storey, J., Strojek, I.M., Testera, G., Tietje, I., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., Zurlo, N., Røhne, O. M., and Strojek, I. M.
Subjects: Physics, Atom interferometer, Particle physics, Physics::General Physics, 010308 nuclear & particles physics, General Relativity and Cosmology, QC1-999, 01 natural sciences, Antiproton Decelerator, Nuclear physics, Physics and Astronomy (all), Physics and Astronomy. Antimatter. Antiprotons. Gravitational acceleration, Gravitational field, Deflection (physics), Antiproton, Antimatter, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Atomic Physics, Equivalence principle, gravity, antimatter, 010306 general physics, Antihydrogen
Abstract: International audience; The weak equivalence principle states that the motion of a body in a gravitational field is independent of its structure or composition. This postulate of general relativity has been tested to very high precision with ordinary matter, but no relevant experimental verification with antimatter has ever been carried out. The AEGIS experiment will measure the gravitational acceleration of antihydrogen to ultimately 1% precision. For this purpose, a pulsed horizontal antihydrogen beam with a velocity of several 100 m s−1 will be produced. Its vertical deflection due to gravity will be detected by a setup consisting of material gratings coupled with a position-sensitive detector, operating as a moiré deflectometer or an atom interferometer. The AEGIS experiment is installed at CERN’s Antiproton Decelerator, currently the only facility in the world which produces copious amounts of low-energy antiprotons. The construction of the setup has been going on since 2010 and is nearing completion. A proof-of-principle experiment with antiprotons has demonstrated that the deflection of antiparticles by a few μm due to an external force can be detected. Technological and scientific development pertaining to specific challenges of the experiment, such as antihydrogen formation by positronium charge exchange or the position-sensitive detection of antihydrogen annihilations, is ongoing.
Published: 2016
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39. Positron manipulation and positronium laser excitation in AEgIS

Author: Daniel Comparat, Sandra Zavatarelli, Marco Giammarchi, Laura Resch, Giovanni Consolati, Giovanni Cerchiari, Germano Bonomi, M. Sacerdoti, F. Sorrentino, M. Spacek, G. Nebbia, Angela Gligorova, P. Lebrun, Marco Prevedelli, M. Kimura, H. Holmestad, P. Lansonneur, S. Haider, Heidi Sandaker, I. C. Tietje, Paola Scampoli, F. Prelz, James William Storey, T. Kaltenbacher, G. Testera, Tomoko Ariga, N. Pacifico, A. Demetrio, Stefan Rosenberger, Viktor Matveev, C. Evans, Romualdo Santoro, L. Ravelli, Markus K. Oberthaler, Karl Chlouba, Luca Penasa, Fabrizio Castelli, Davide Pagano, Simone Cialdi, Claude Amsler, Michael Doser, E. Jordan, Daniel Krasnicky, Alberto Rotondi, C. Pistillo, Ruggero Caravita, Ola Kenji Forslund, Sebastiano Mariazzi, Patrick Nedelec, Lea Di Noto, Adriano Fontana, P. Yzombard, Johann Zmeskal, Sebastian Gerber, L. Cabaret, T. Huse, J. Liberadzka, F. Guatieri, B. Rienäcker, Roberto S. Brusa, S. Vamosi, V. Petracek, Sebastian Lehner, Izabela M Strojek, Antonio Ereditato, Alexey Dudarev, J. Fesel, S. Gninenko, Z. Mazzotta, Alban Kellerbauer, Chloé Malbrunot, Lisa Marx, Ole Røhne, Rafael Ferragut, Ine L Jernelv, Akitaka Ariga, P. Bräunig, J. Bremer, Stefano Aghion, Eberhard Widmann, V. Lagomarsino, Torsten Koetting, Massimo Caccia, Mariazzi, S., Caravita, R., Aghion, S., Amsler, C., Ariga, A., Ariga, T., Bonomi, G., Braunig, P., Bremer, J., Brusa, R. S., Cabaret, L., Caccia, M., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Forslund, O. K., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Jernelv, I. L., Jordan, E., Kaltenbacher, T., Kellerbauer, A., Kimura, M., Koetting, T., Krasnicky, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Lehner, S., Liberadzka, J., Malbrunot, C., Marx, L., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Resch, L., Rienacker, B., Rohne, O. M., Rosenberger, S., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Sorrentino, F., Spacek, M., Storey, J., Strojek, I. M., Testera, G., Tietje, I., Vamosi, S., Widmann, E., Yzombard, P., Zavatarelli, S., and Zmeskal, J.
Subjects: Positron, Positronium, Radiation, Materials Science (all), Condensed Matter Physics, 01 natural sciences, 010305 fluids & plasmas, law.invention, symbols.namesake, law, 0103 physical sciences, Physics::Atomic and Molecular Clusters, General Materials Science, Physics::Atomic Physics, 010306 general physics, Antihydrogen, Physics, Laser, Excited state, Antimatter, Rydberg formula, symbols, Atomic physics, Excitation
Abstract: Production of antihydrogen by using the charge exchange reaction, as proposed by AEgIS (Antimatter Experiment: gravity, Interferometry, Spectroscopy), requires the formation of a dense cloud of positronium atoms excited to Rydberg states. In this work, the recent advances in AEgIS towards this result are described. Namely, the manipulation of positrons to produce bunches containing more than 108 particles and the laser excitation of positronium to Rydberg states, using n=3 as intermediate level, are presented.
Published: 2016

40. Direct detection of antiprotons with the Timepix3 in a new electrostatic selection beamline

Author: K. Chlouba, N. Pacifico, Chloé Malbrunot, Daniel Comparat, Luca Penasa, Nicola Zurlo, L. Di Noto, M. Kimura, Ole Røhne, P. Lansonneur, G. Nebbia, D. Krasnický, L. Smestad, A. Demetrio, Giovanni Consolati, Germano Bonomi, Sebastiano Mariazzi, Stefano Aghion, C. Evans, Massimo Caccia, Lukas Tlustos, M. Campbell, M. Spacek, J. Alozy, Giovanni Cerchiari, P. Bräunig, Roberto S. Brusa, V. Petracek, J. Bremer, Adriano Fontana, Gerard Lawler, M. Oberthaler, Angela Gligorova, Eberhard Widmann, P. Yzombard, Sandra Zavatarelli, L. Cabaret, T. Huse, V. Lagomarsino, Akitaka Ariga, P. Lebrun, M. Sacerdoti, Alexey Dudarev, Romualdo Santoro, Marco Prevedelli, Marco Giammarchi, X. Llopart, J. Fesel, Rafael Ferragut, I. C. Tietje, Paola Scampoli, James William Storey, Z. Mazzotta, Antonio Ereditato, Patrick Nedelec, Alban Kellerbauer, Claude Amsler, L. Resch, Johann Zmeskal, L. Marx, Felice Sorrentino, S. Haider, F. Prelz, Sebastian Gerber, C. Pistillo, F. Guatieri, H. Holmestad, Ruggero Caravita, Tomoko Ariga, V. A. Matveev, L. Ravelli, Davide Pagano, G. Testera, I. M. Strojek, Fabrizio Castelli, Simone Cialdi, E. Jordan, Michael Doser, Heidi Sandaker, Alberto Rotondi, Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Pacifico, N, Aghion, S., Alozy, J., Amsler, C., Ariga, A., Ariga, T., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R.S., Cabaret, L., Caccia, M., Campbell, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Jordan, E., Kellerbauer, A., Kimura, M., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lawler, G., Lebrun, P., Llopart, X., Malbrunot, C., Mariazzi, S., Marx, L., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Resch, L., Røhne, O.M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Smestad, L., Sorrentino, F., Spacek, M., Storey, J., Strojek, I.M., Testera, G., Tietje, I., Tlustos, L., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., Zurlo, N., Brusa, R. S., Røhne, O. M., Scampoli, Paola, and Strojek, I. M.
Subjects: Antimatter, Silicon, Nuclear and High Energy Physics, AEgIS, Antiprotons, Detector, Timepix, Antiproton, 01 natural sciences, Nuclear physics, Instrumentation, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Physics, Large Hadron Collider, Annihilation, 010308 nuclear & particles physics, Antiproton Decelerator, Time of flight, Beamline, High Energy Physics::Experiment
Abstract: see paper for full list of authors; International audience; We present here the first results obtained employing the Timepix3 for the detection and tagging of annihilations of low energy antiprotons. The Timepix3 is a recently developed hybrid pixel detector with advanced Time-of-Arrival and Time-over-Threshold capabilities and has the potential of allowing precise kinetic energy measurements of low energy charged particles from their time of flight. The tagging of the characteristic antiproton annihilation signature, already studied by our group, is enabled by the high spatial and energy resolution of this detector. In this study we have used a new, dedicated, energy selection beamline (GRACE). The line is symbiotic to the AEgIS experiment at the CERN Antiproton Decelerator and is dedicated to detector tests and possibly antiproton physics experiments. We show how the high resolution of the Timepix3 on the Time-of-Arrival and Time-over-Threshold information allows for a precise 3D reconstruction of the annihilation prongs. The presented results point at the potential use of the Timepix3 in antimatter-research experiments where a precise and unambiguous tagging of antiproton annihilations is required.
Published: 2016
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41. Positron bunching and electrostatic transport system for the production and emission of dense positronium clouds into vacuum

Author: C. Pistillo, M. Sacerdoti, Ruggero Caravita, Marco Prevedelli, I. C. Tietje, L. Cabaret, Ola Kenji Forslund, T. Huse, S. Rosenberger, Patrick Nedelec, V. A. Matveev, Adriano Fontana, Giovanni Cerchiari, Johann Zmeskal, Sandra Zavatarelli, J. Liberadzka, Simone Cialdi, E. Jordan, Marco Giammarchi, G. Nebbia, Fiodor Sorrentino, Akitaka Ariga, Daniel Comparat, M. Kimura, N. Pacifico, Z. Mazzotta, G. Testera, Giovanni Consolati, A. S. Belov, Germano Bonomi, Romualdo Santoro, Luca Penasa, D. Krasnicky, I. L. Jernelv, T. Kaltenbacher, M. Spacek, Alban Kellerbauer, A. Demetrio, Sebastiano Mariazzi, Fabrizio Castelli, Chloé Malbrunot, Heidi Sandaker, P. Lansonneur, Ole Røhne, C. Evans, Michael Doser, S. N. Gninenko, J. Fesel, M. Oberthaler, L. Marx, Angela Gligorova, H. Holmestad, Paola Scampoli, James William Storey, P. Bräunig, F. Prelz, P. Yzombard, Alberto Rotondi, Claude Amsler, T. Koetting, B. Rienäcker, Sebastian Gerber, Roberto S. Brusa, S. Vamosi, J. Bremer, V. Petracek, Antonio Ereditato, K. Chlouba, F. Guatieri, Sebastian Lehner, Alexey Dudarev, Stefano Aghion, S. Haider, P. Lebrun, Eberhard Widmann, V. Lagomarsino, L. Di Noto, L. Ravelli, Davide Pagano, Tomoko Ariga, I. M. Strojek, Massimo Caccia, Aghion, S., Amsler, C., Ariga, A., Ariga, T., Belov, A. S., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R. S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Evans, C., Fesel, J., Fontana, A., Forslund, O. K., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Jernelv, I. L., Jordan, E., Kaltenbacher, T., Kellerbauer, A., Kimura, M., Koetting, T., Krasnicky, D., Lagomarsino, V., Lebrun, P., Lansonneur, P., Lehner, S., Liberadzka, J., Malbrunot, C., Mariazzi, S., Marx, L., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Rienäcker, B., Røhne, O. M., Rosenberger, S., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, Paola, Sorrentino, F., Spacek, M., Storey, J., Strojek, I. M., Testera, G., Tietje, I., Vamosi, S., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., Belov, A.S., Braunig, P., Brusa, R.S., Forslund, O.K., Jernelv, I.L., Rienacker, B., Rohne, O.M., Scampoli, P., Strojek, I.M., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and AEGIS
Subjects: Physics, Bunching, Positron, Positronium, Instrumentation, Nuclear and High Energy Physics, 530 Physics, Astrophysics::High Energy Astrophysical Phenomena, Porous silicon, Positron, Positronium, Bunching, Magnetic field, Full width at half maximum, Bunches, Physics in General, Physics::Accelerator Physics, High Energy Physics::Experiment, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Positron emission, Atomic physics, Spectroscopy
Abstract: International audience; We describe a system designed to re-bunch positron pulses delivered by an accumulator supplied by a positron source and a Surko-trap. Positron pulses from the accumulator are magnetically guided in a 0.085 T field and are injected into a region free of magnetic fields through a μμ-metal field terminator. Here positrons are temporally compressed, electrostatically guided and accelerated towards a porous silicon target for the production and emission of positronium into vacuum. Positrons are focused in a spot of less than 4 mm FWTM in bunches of ∼8 ns FWHM. Emission of positronium into the vacuum is shown by single shot positron annihilation lifetime spectroscopy.
Published: 2015
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42. Emulsion detectors for the antihydrogen detection in AEgIS

Author: G. Testera, Ole Røhne, S. N. Gninenko, Fabrizio Castelli, M. Subieta, Michael Doser, M. C. Simon, C. Pistillo, Paola Scampoli, James William Storey, Claude Amsler, Giovanni Consolati, Ruggero Caravita, Patrick Nedelec, Akitaka Ariga, H. Holmestad, Germano Bonomi, K. Chlouba, Johann Zmeskal, M. Spacek, L. Cabaret, G. Nebbia, T. Huse, Chloé Malbrunot, P. Bräunig, S. Rosenberger, H. Derking, F. Prelz, J. Bremer, Marco Giammarchi, V. A. Matveev, Sebastiano Mariazzi, Alexey Dudarev, Rafael Ferragut, Daniel Comparat, Z. Mazzotta, Alban Kellerbauer, Sebastian Gerber, Stefano Aghion, Simone Cialdi, Sebastian Lehner, S. D. Hogan, E. Jordan, A. S. Belov, S. Haider, N. Pacifico, M. Oberthaler, Luca Penasa, Angela Gligorova, P. Yzombard, Antonio Ereditato, Cristina Riccardi, Tomoko Ariga, L. Ravelli, I. M. Strojek, Massimo Caccia, V. Petráček, Eberhard Widmann, V. Lagomarsino, Jiro Kawada, L. Di Noto, Sandra Zavatarelli, Marco Prevedelli, Romualdo Santoro, M. Kimura, D. Krasnický, A. Demetrio, Heidi Sandaker, Alberto Rotondi, Andrea Fontana, Giovanni Cerchiari, R. S. Brusa, Pistillo, C, Aghion, S., Amsler, C., Ariga, A., Ariga, T., Belov, A., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R. S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Derking, H., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Ferragut, R., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Haider, S., Hogan, S., Holmestad, H., Huse, T., Jordan, E. J., Kawada, J., Kellerbauer, A., Kimura, M., Krasnický, D., Lagomarsino, V., Lehner, S., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Nebbia, G., Nédélec, P., Oberthaler, M., Pacifico, N., Penasa, L., Petráček, V., Prelz, F., Prevedelli, M., Ravelli, L., Riccardi, C., Røhne, O., Rosenberger, S., Rotondi, A., Sandaker, H., Santoro, R., Scampoli, Paola, Simon, M., Špaček, M., Storey, J., Strojek, I. M., Subieta, M., Testera, G., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and AEGIS
Subjects: Nuclear and High Energy Physics, Physics::General Physics, Antimatter, Atomic and Molecular Physics, and Optic, 530 Physics, Physics::Instrumentation and Detectors, Condensed Matter Physic, 01 natural sciences, Nuclear physics, Gravitational field, Atomic and Molecular Physics, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Physical and Theoretical Chemistry, 010306 general physics, Antihydrogen, Nuclear and High Energy Physic, Physics, Large Hadron Collider, 010308 nuclear & particles physics, Emulsion, Detector, Gravitational interaction, Emulsions, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, and Optics, Beam (structure)
Abstract: see paper for full list of authors; International audience; The AEgIS experiment at CERN aims to perform the first direct measurement of gravitational interaction between matter and antimatter by measuring the deviation of a cold antihydrogen beam in the Earth gravitational field. The design of the experiment has been recently updated to include emulsion films as position sensitive detector. The submicrometric position accuracy of emulsions leads indeed to a significant improvement of the experimental sensitivity. We present results of preliminary tests and discuss perspectives for the final measurement.
Published: 2015
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43. Particle tracking at cryogenic temperatures: the Fast Annihilation Cryogenic Tracking (FACT) detector for the AEgIS antimatter gravity experiment

Author: Sandra Zavatarelli, Tomoko Ariga, Andrea Fontana, Giovanni Consolati, Marco Prevedelli, Chloé Malbrunot, Germano Bonomi, L. Ravelli, M. Spacek, G. Nebbia, S. N. Gninenko, S. Haider, Sebastiano Mariazzi, Simone Cialdi, J. Bremer, L. Cabaret, I. M. Strojek, T. Huse, E. Jordan, A. S. Belov, Ole Røhne, Sebastian Gerber, M. Kimura, Markus K. Oberthaler, S. D. Hogan, Heidi Sandaker, Rafael Ferragut, P. Scampoli, C. Pistillo, F. Prelz, Marco Giammarchi, Ruggero Caravita, Giovanni Cerchiari, Alberto Rotondi, K. Chlouba, Romualdo Santoro, Z. Mazzotta, Akitaka Ariga, James William Storey, Alban Kellerbauer, Daniel Comparat, Alexey Dudarev, V. A. Matveev, Claude Amsler, R. Vaccarone, Patrick Nedelec, Johann Zmeskal, H. Derking, M. Subieta, Angela Gligorova, P. Yzombard, N. Pacifico, Stefano Aghion, R. S. Brusa, Luca Penasa, P. Bräunig, Alice Magnani, Sebastian Lehner, Eberhard Widmann, V. Lagomarsino, Massimo Caccia, V. Petráček, Jiro Kawada, L. Di Noto, M. C. Simon, S. Rosenberger, H. Holmestad, D. Krasnicky, Antonio Ereditato, G. Testera, Cristina Riccardi, Fabrizio Castelli, Michael Doser, Storey, J., Aghion, S., Amsler, C., Ariga, A., Ariga, T., Belov, A., Bonomi, G., Braunig, P., Bremer, J., Brusa, R., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Derking, H., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Ferragut, R., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Haider, S., Hogan, S., Holmestad, H., Huse, T., Jordan, E. J., Kawada, J., Kellerbauer, A., Kimura, M., Krasnicky, D., Lagomarsino, V., Lehner, S., Magnani, A., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Riccardi, C., Rohne, O. M., Rosenberger, S., Rotondi, A., Sandaker, H., Santoro, R., Scampoli, P., Simon, M., Spacek, M., Strojek, I. M., Subieta, M., Testera, G., Vaccarone, R., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and AEgIS
Subjects: Atom interferometer, gas and liquid scintillators), Physics::Instrumentation and Detectors, 530 Physics, Context (language use), Cryogenics, Tracking (particle physics), Nuclear physics, Particle tracking detectors, Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators), Silicon photomultiplier, Physics::Atomic and Molecular Clusters, Physics::Atomic Physics, Detectors and Experimental Techniques, Antihydrogen, Instrumentation, Mathematical Physics, Physics, Detector, antimatter. scintillating fibers, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Particle tracking detector, antimatter. scintillating fibers, silicon photomultipliers, scintillation and light emission processes (solid, Scintillators, Antimatter, silicon photomultipliers
Abstract: see paper for full list of authors; International audience; The AEgIS experiment is an interdisciplinary collaboration between atomic, plasma and particle physicists, with the scientific goal of performing the first precision measurement of the Earth's gravitational acceleration on antimatter. The principle of the experiment is as follows: cold antihydrogen atoms are synthesized in a Penning-Malmberg trap and are Stark accelerated towards a moiré deflectometer, the classical counterpart of an atom interferometer, and annihilate on a position sensitive detector. Crucial to the success of the experiment is an antihydrogen detector that will be used to demonstrate the production of antihydrogen and also to measure the temperature of the anti-atoms and the creation of a beam. The operating requirements for the detector are very challenging: it must operate at close to 4 K inside a 1 T solenoid magnetic field and identify the annihilation of the antihydrogen atoms that are produced during the 1 μs period of antihydrogen production. Our solution—called the FACT detector—is based on a novel multi-layer scintillating fiber tracker with SiPM readout and off the shelf FPGA based readout system. This talk will present the design of the FACT detector and detail the operation of the detector in the context of the AEgIS experiment.
Published: 2015
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44. AEgIS at ELENA: outlook for physics with a pulsed cold antihydrogen beam.

Author: Doser M, Aghion S, Amsler C, Bonomi G, Brusa RS, Caccia M, Caravita R, Castelli F, Cerchiari G, Comparat D, Consolati G, Demetrio A, Di Noto L, Evans C, Fanì M, Ferragut R, Fesel J, Fontana A, Gerber S, Giammarchi M, Gligorova A, Guatieri F, Haider S, Hinterberger A, Holmestad H, Kellerbauer A, Khalidova O, Krasnický D, Lagomarsino V, Lansonneur P, Lebrun P, Malbrunot C, Mariazzi S, Marton J, Matveev V, Mazzotta Z, Müller SR, Nebbia G, Nedelec P, Oberthaler M, Pacifico N, Pagano D, Penasa L, Petracek V, Prelz F, Prevedelli M, Rienaecker B, Robert J, Røhne OM, Rotondi A, Sandaker H, Santoro R, Smestad L, Sorrentino F, Testera G, Tietje IC, Widmann E, Yzombard P, Zimmer C, Zmeskal J, and Zurlo N
Abstract: The efficient production of cold antihydrogen atoms in particle traps at CERN's Antiproton Decelerator has opened up the possibility of performing direct measurements of the Earth's gravitational acceleration on purely antimatter bodies. The goal of the AEgIS collaboration is to measure the value of g for antimatter using a pulsed source of cold antihydrogen and a Moiré deflectometer/Talbot-Lau interferometer. The same antihydrogen beam is also very well suited to measuring precisely the ground-state hyperfine splitting of the anti-atom. The antihydrogen formation mechanism chosen by AEgIS is resonant charge exchange between cold antiprotons and Rydberg positronium. A series of technical developments regarding positrons and positronium (Ps formation in a dedicated room-temperature target, spectroscopy of the n =1-3 and n =3-15 transitions in Ps, Ps formation in a target at 10 K inside the 1 T magnetic field of the experiment) as well as antiprotons (high-efficiency trapping of [Formula: see text], radial compression to sub-millimetre radii of mixed [Formula: see text] plasmas in 1 T field, high-efficiency transfer of [Formula: see text] to the antihydrogen production trap using an in-flight launch and recapture procedure) were successfully implemented. Two further critical steps that are germane mainly to charge exchange formation of antihydrogen-cooling of antiprotons and formation of a beam of antihydrogen-are being addressed in parallel. The coming of ELENA will allow, in the very near future, the number of trappable antiprotons to be increased by more than a factor of 50. For the antihydrogen production scheme chosen by AEgIS, this will be reflected in a corresponding increase of produced antihydrogen atoms, leading to a significant reduction of measurement times and providing a path towards high-precision measurements.This article is part of the Theo Murphy meeting issue 'Antiproton physics in the ELENA era'., (© 2018 The Author(s).)
Published: 2018
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