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97 results on '"Lansonneur P."'

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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5. Velocity selected production of $2^3S$ 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., Krasnicky, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., 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., Widmann, E., Yzombard, P., Zimmer, C., and Zurlo, N.

Subjects
Physics - Atomic Physics
Abstract

Positronium in the $2^3S$ 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, $2^3S$ positronium is produced - in absence of electric field - via spontaneous radiative decay from the $3^3P$ level populated with a 205nm 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 nanochannelled positron/positronium converter were selected by delaying the excitation pulse with respect to the production instant. $ 2^3S $ positronium atoms with velocity tuned between $ 7 \cdot 10^4 $ m/s and $ 10 \cdot 10^4 $ m/s were thus produced. Depending on the selected velocity, a $2^3S$ production effciency ranging from $\sim 0.8 \%$ to $\sim 1.7%$, with respect to the total amount of emitted positronium, was obtained. The observed results give a branching ratio for the $3^3P$-$2^3S$ spontaneous decay of $(9.7 \pm 2.7) \% $. The present velocity selection technique could allow to produce an almost monochromatic beam of $\sim 1 \cdot 10^3 $ $2^3S$ atoms with a velocity spread $ < 10^4 $ m/s and an angular divergence of $\sim$ 50 mrad., Comment: 6 pages, 3 figures, 1 table

Published
2018
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6. Producing long-lived $2^3\text{S}$ Ps via $3^3\text{P}$ 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., 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., Lagormarsino, 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., Sandacker, 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 - Atomic Physics
Abstract

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
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7. Measurement of antiproton annihilation on Cu, Ag and Au with emulsion films

Author

Aghion, S., Amsler, C., Ariga, A., 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., Hinterberger, A., Holmestad, H., Huse, T., Kawada, J., Kellerbauer, A., Kimura, M., Krasnicky, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Muller, 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., Rohne, 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., and Zurlo, N.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
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.

Published
2017
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8. Probing top anomalous couplings at the LHC with trilepton signatures in the single top mode

Author

Agram, Jean-Laurent, Andrea, Jeremy, Conte, Eric, Fuks, Benjamin, Gelé, Denis, and Lansonneur, Pierre

Subjects
High Energy Physics - Phenomenology
Abstract

We investigate trilepton final states to probe top anomalous couplings at the Large Hadron Collider. We focus on events originating from the associated production of a single top quark with a Z-boson, a channel sensitive to several flavor-changing neutral interactions of top and up/charm quarks. In particular, we explore a way to access simultaneously their anomalous couplings to Z-bosons and gluons and derive the discovery potential of trilepton final states to such interactions with 20 fb-1 of 8 TeV collisions. We show that effective coupling strengths of O(0.1-1) TeV-1 can be reached. Equivalently, branching fractions of top quarks into lighter quarks and gluons or Z-bosons can be constrained to be below O(0.1-1)%., Comment: 5 pages, 3 figures, 1 table; version accepted by PLB

Published
2013
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9. 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

10. 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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13. 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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14. Correction to: Compression of a mixed antiproton and electron non-neutral plasma to high densities: Eur. Phys. J. D 72: 76 (2018), DOI: 10.1140/epjd/e2018-80617-x

Author

Aghion, Stefano, Amsler, Claude, Bonomi, Germano, Brusa, Roberto S., Caccia, Massimo, Caravita, Ruggero, Castelli, Fabrizio, Cerchiari, Giovanni, Comparat, Daniel, Consolati, Giovanni, Demetrio, Andrea, Di Noto, Lea, Doser, Michael, Evans, Craig, Faní, Mattia, Ferragut, Rafael, Fesel, Julian, Fontana, Andrea, Gerber, Sebastian, Giammarchi, Marco, Gligorova, Angela, Guatieri, Francesco, 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, Victor, Mazzotta, Zeudi, Müller, Simon R., Nebbia, Giancarlo, Nedelec, Patrick, Oberthaler, Markus, Pacifico, Nicola, Pagano, Davide, Penasa, Luca, Petracek, Vojtech, Prelz, Francesco, Prevedelli, Marco, Rienaecker, Benjamin, Robert, Jacques, Røhne, Ole M., Rotondi, Alberto, Sandaker, Heidi, Santoro, Romualdo, Smestad, Lillian, Sorrentino, Fiodor, Testera, Gemma, Tietje, Ingmari C., Widmann, Eberhard, Yzombard, Pauline, Zimmer, Christian, Zmeskal, Johann, Zurlo, Nicola, and Antonello, Massimiliano

Published
2019
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15. 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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17. Compression of a mixed antiproton and electron non-neutral plasma to high densities

Author

Aghion, Stefano, Amsler, Claude, Bonomi, Germano, Brusa, Roberto S., 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, 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, Victor, Mazzotta, Zeudi, Müller, Simon R., Nebbia, Giancarlo, Nedelec, Patrick, Oberthaler, Markus, Pacifico, Nicola, Pagano, Davide, Penasa, Luca, Petracek, Vojtech, Prelz, Francesco, Prevedelli, Marco, Rienaecker, Benjamin, Robert, Jacques, Røhne, Ole M., Rotondi, Alberto, Sandaker, Heidi, Santoro, Romualdo, Smestad, Lillian, Sorrentino, Fiodor, Testera, Gemma, Tietje, Ingmari C., Widmann, Eberhard, Yzombard, Pauline, Zimmer, Christian, Zmeskal, Johann, Zurlo, Nicola, and Antonello, Massimiliano

Published
2018
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20. 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

22. Gravity and antimatter: the AEgIS experiment at CERN

Author

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

Published
2020
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23. 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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24. 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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25. 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

26. 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

29. 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

30. The AEgIS experiment: towards antimatter gravity measurements

Author

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

Published
2019
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31. Positronium Rydberg excitation diagnostic in a 1T cryogenic environment

Author

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

Published
2019
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32. 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

33. 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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34. Antimatter Gravity Measurements with Cold Antihydrogen: the AEgIS Experiment

Author

Doser, M., 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., 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., 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., Smestad, L., Sorrentino, F., Strojek, I. M., Testera, G., Tietje, I. C., Vamosi, S., Widmann, E., Yzombard, P., Zmeskal, J., and Zurlo, N.

Subjects
Nuclear physics, Physics, Gravitation, Antimatter, Gravity (chemistry), CPT Symetry, Antimatter, Gravity, CPT Symetry, Gravity, Equivalence principle, Antihydrogen, Charge exchange
Published
2017
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35. 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

36. Antiproton tagging and vertex fitting in a Timepix3 detector

Author

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

Published
2018
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37. 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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38. Overview of Recent Work on Laser Excitation of Positronium for the Formation of Antihydrogen

Author

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

Published
2017
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39. Positronium for Antihydrogen Production in the AEGIS Experiment

Author

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

Published
2017
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40. The DAQ system for the AEḡIS experiment

Author

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

Published
2017
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41. Measurement of antiproton annihilation on Cu, Ag and Au with emulsion films

Author

Aghion, S., primary, Amsler, C., additional, Ariga, A., additional, Ariga, T., additional, Bonomi, G., additional, Bräunig, P., additional, Brusa, R.S., additional, Cabaret, L., additional, Caccia, M., additional, Caravita, R., additional, Castelli, F., additional, Cerchiari, G., additional, Comparat, D., additional, Consolati, G., additional, Demetrio, A., additional, Noto, L. Di, additional, Doser, M., additional, Ereditato, A., additional, Evans, C., additional, Ferragut, R., additional, Fesel, J., additional, Fontana, A., additional, Gerber, S., additional, Giammarchi, M., additional, Gligorova, A., additional, Guatieri, F., additional, Haider, S., additional, Hinterberger, A., additional, Holmestad, H., additional, Huse, T., additional, Kawada, J., additional, Kellerbauer, A., additional, Kimura, M., additional, Krasnický, D., additional, Lagomarsino, V., additional, Lansonneur, P., additional, Lebrun, P., additional, Malbrunot, C., additional, Mariazzi, S., additional, Matveev, V., additional, Mazzotta, Z., additional, Müller, S.R., additional, Nebbia, G., additional, Nedelec, P., additional, Oberthaler, M., additional, Pacifico, N., additional, Pagano, D., additional, Penasa, L., additional, Petracek, V., additional, Pistillo, C., additional, Prelz, F., additional, Prevedelli, M., additional, Ravelli, L., additional, Rienaecker, B., additional, RØhne, O.M., additional, Rotondi, A., additional, Sacerdoti, M., additional, Sandaker, H., additional, Santoro, R., additional, Scampoli, P., additional, Simon, M., additional, Smestad, L., additional, Sorrentino, F., additional, Testera, G., additional, Tietje, I.C., additional, Vamosi, S., additional, Vladymyrov, M., additional, Widmann, E., additional, Yzombard, P., additional, Zimmer, C., additional, Zmeskal, J., additional, and Zurlo, N., additional

Published
2017
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42. Advances in Ps Manipulations and Laser Studies in the AEgIS Experiment

Author

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

Published
2017
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43. The AEgIS experiment at CERN: measuring antihydrogen free-fall in earth’s gravitational field to test WEP with antimatter

Author

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

Published
2017
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44. Simulation and experimental validation of a prototype electron beam linear accelerator for preclinical studies.

Author

Lansonneur, Pierre, Favaudon, Vincent, Heinrich, Sophie, Fouillade, Charles, Verrelle, Pierre, and De Marzi, Ludovic

Abstract

• Monte-Carlo simulation of a prototype electron LINAC. • Dose distributions in solid water were measured and compared with simulations. • Realistic electron irradiation conditions simulated in voxelised mice CT images. • 3D dose distributions and dose-volume histograms in lungs of mice were analyzed. Measurements and Monte-Carlo simulations were carried out to model the dose distribution of a prototype electron beam linear accelerator (Kinetron LINAC) to determine the dose to organs in small animal irradiations experiments. Dose distributions were simulated using the GATE8.0/Geant4.10.3 Monte-Carlo platform, and measured in air and solid water phantoms using a commercial scintillating screen detector and new EBT-XD Gafchromic films. The LINAC is able to produce 4.5 MeV electron beams at dose-rates ranging from Gy/min to thousands of Gy/s, and is used to study the radiobiological effects of very-high dose-rates that have been shown to protect normal tissues from radiation toxicity. Numerical simulations and experimental dosimetric characterisation of this electron accelerator were performed with the Monte-Carlo toolkit and various detectors. Absolute dose distributions in solid water were measured and compared with simulations. Realistic electron irradiation conditions were simulated in voxelised mice CT images. 3D dose distributions and dose-volume histograms in lungs of mice were simulated and analyzed. Measured and calculated depth-dose profiles for several beam configurations (energy and dose-rate) were compared. Beam emittance was validated by comparing measured and calculated beam sizes along the central axis in air: the deviation for all conditions was less than 1 mm. A good agreement was obtained between experimental dose distributions and the results obtained with simulations (<2% dose differences for lateral and depth-dose profiles). The method presented here, relying on few free parameters, can be adapted to very-high dose-rate electron irradiation to support the analysis of preclinical research experiments. [ABSTRACT FROM AUTHOR]

Published
2019
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45. Positron Manipulation and Positronium Laser Excitation in AEgIS

Author

Mariazzi, Sebastiano, Caravita, Ruggero, Aghion, Stefano, Amsler, Claude, Ariga, Akitaka, Ariga, Tomoko, Bonomi, Germano, Bräunig, Philippe, Bremer, Johan, Brusa, Roberto S., Cabaret, Luis, Caccia, Massimo, Castelli, Fabrizio, Cerchiari, G., Chlouba, Karl, Cialdi, Simone, Comparat, Daniel, Consolati, Giovanni, Demetrio, Andrea, di Noto, Lea, Doser, Michael, Dudarev, Alexey, Ereditato, Antonio, Evans, Craig, Ferragut, Rafael, Fesel, Julian, Fontana, Andrea, Forslund, Ola K., Gerber, Sebastian, Giammarchi, Marco, Gligorova, Angela, Gninenko, Sergei, Guatieri, Francesco, Haider, Stefan, Holmestad, Helga, Huse, Torkjell, Jernelv, Ine L., Jordan, Elena, Kaltenbacher, Thomas, Kellerbauer, Alban, Kimura, Mitsuhiro, Koetting, Torsten, Krasnicky, Daniel, Lagomarsino, Vittorio, Lansonneur, Pierre, Lebrun, Patrice, Lehner, Sebastian, Liberadzka, Joanna, Malbrunot, Chloe, Marx, Lisa, Matveev, Viktor, Mazzotta, Zeudi, Nebbia, Giancarlo, Nedelec, Patrick, Oberthaler, Markus, Pacifico, Nicola, Pagano, Davide, Penasa, Luca, Petracek, Vojtech, Pistillo, Ciro, Prelz, Francesco, Prevedelli, Marco, Ravelli, Luca, Resch, Laura, Rienäcker, Benjamin, Røhne, Ole M., Rosenberger, Stefan, Rotondi, Alberto, Sacerdoti, Michele, Sandaker, Heidi, Santoro, Romualdo, Scampoli, Paola, Sorrentino, Fiodor, Spacek, Michal, Storey, James, Strojek, Izabela M., Testera, Gemma, Tietje, Ingmari, Vamosi, Stefan, Widmann, Eberhard, Yzombard, Pauline, Zavatarelli, Sandra, and Zmeskal, Johann

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
2017
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46. 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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47. 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

48. 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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49. Management of jaw fractures in oral surgery in public and private practice: a retrospective study from 2006 to 2017

Author

Buron Corentin, Mounier Christian, Guiavarc'h Carine, Lansonneur Cédric, Conan Matthieu, Bouillon Kim, and Le Toux Guy

Subjects
maxillary, mandibular fractures, oral surgery, private, public practice, Dentistry, RK1-715, Surgery, RD1-811
Abstract

Introduction: To date, no epidemiological studies on jaw fracture have examined its characteristics according to hospital status (public vs private). The aim of this study was to examine their differences in terms of patient- and injury-related variables. Methods: A retrospective study was conducted using patients' medical records in 2 types of hospital located in the northern area of Brittany (France). All patients hospitalized for jaw fracture between 2006 and 2017 were eligible. Comparisons between centres according to age, gender, anatomic location of fracture, mechanism of injury, and length of stay were undertaken using χ2, Fisher exact test, t-test, and Cochrane-Armitage trend test. Results: A total of 142 patients were included: 45.1% in the public and 54.9% in the private hospitals. Of them, 84.5% were men and the mean age was 32.0. Main causes of fractures were assault (56.3%), fall (30.3%) and road traffic accident (10%). A small number of patients had polytrauma (4.2%). The mean duration of stay was less than 2 days. Compared to patients who were admitted in private hospital, those who were likely to be admitted in public hospital were those: who had a jaw fracture in context of road traffic accident (18.8% vs 2.6%), with polytrauma (9.4% vs 0.0%) and maxilla fracture (9.4% vs 1.3%), and who had a longer stay (2.2 vs 1.1 days). Conclusion: This study showed that differences observed in characteristics of jaw fractures between public and private hospitals may be due to recruitment process: more severely affected patients are likely to be admitted in the public hospital.

Published
2020
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50. 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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