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1. Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud

Author

Adrich, P., Blumer, P., Caratsch, G., Chung, M., Cladé, P., Comini, P., Crivelli, P., Dalkarov, O., Debu, P., Douillet, A., Drapier, D., Froelich, P., Garroum, N., Guellati-Khelifa, S., Guyomard, J., Hervieux, P-A., Hilico, L., Indelicato, P., Jonsell, S., Karr, J-P., Kim, B., Kim, S., Kim, E-S., Ko, Y. J., Kosinski, T., Kuroda, N., Latacz, B. M., Lee, B., Lee, H., Lee, J., Lim, E., Liszkay, L., Lunney, D., Manfredi, G., Mansoulié, B., Matusiak, M., Nesvizhevsky, V., Nez, F., Niang, S., Ohayon, B., Park, K., Paul, N., Pérez, P., Regenfus, C., Reynaud, S., Roumegou, C., Roussé, J-Y., Sacquin, Y., Sadowski, G., Sarkisyan, J., Sato, M., Schmidt-Kaler, F., Staszczak, M., Szymczyk, K., Tanaka, T. A., Tuchming, B., Vallage, B., Voronin, A., van der Werf, D. P., Won, D., Wronka, S., Yamazaki, Y., Yoo, K-H., and Yzombard, P.

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

We report on the first production of an antihydrogen beam by charge exchange of 6.1 keV antiprotons with a cloud of positronium in the GBAR experiment at CERN. The antiproton beam was delivered by the AD/ELENA facility. The positronium target was produced from a positron beam itself obtained from an electron linear accelerator. We observe an excess over background indicating antihydrogen production with a significance of 3-4 standard deviations.

Published
2023
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2. Erratum to: Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud

Author

Adrich, P., Blumer, P., Caratsch, G., Chung, M., Cladé, P., Comini, P., Crivelli, P., Dalkarov, O., Debu, P., Douillet, A., Drapier, D., Froelich, P., Garroum, N., Guellati-Khelifa, S., Guyomard, J., Hervieux, P.-A., Hilico, L., Indelicato, P., Jonsell, S., Karr, J.-P., Kim, B., Kim, S., Kim, E.-S., Ko, Y. J., Kosinski, T., Kuroda, N., Latacz, B. M., Lee, B., Lee, H., Lee, J., Lim, E., Liszkay, L., Lunney, D., Manfredi, G., Mansoulié, B., Matusiak, M., Nesvizhevsky, V., Nez, F., Niang, S., Ohayon, B., Park, K., Paul, N., Pérez, P., Regenfus, C., Reynaud, S., Roumegou, C., Roussé, J.-Y., Sacquin, Y., Sadowski, G., Sarkisyan, J., Sato, M., Schmidt-Kaler, F., Staszczak, M., Szymczyk, K., Tanaka, T. A., Tuchming, B., Vallage, B., Voronin, A., van der Werf, D. P., Welker, A., Won, D., Wronka, S., Yamazaki, Y., Yoo, K.-H., and Yzombard, P.

Published
2024
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3. Positron accumulation in the GBAR experiment

Author

Blumer, P., Charlton, M., Chung, M., Clade, P., Comini, P., Crivelli, P., Dalkarov, O., Debu, P., Dodd, L., Douillet, A., Guellati, S., Hervieux, P. -A, Hilico, L., Indelicato, P., Janka, G., Jonsell, S., Karr, J. -P., Kim, B. H., Kim, E. S., Kim, S. K., Ko, Y., Kosinski, T., Kuroda, N., Latacz, B. M., Lee, B., Lee, H., Lee, J., Leitee, A. M. M., Leveque, K., Lim, E., Liszkay, L., Lotrus, P., Lunney, D., Manfredi, G., Mansoulie, B., Matusiak, M., Mornacchi, G., Nesvizhevsky, V., Nez, F., Niang, S., Nishi, R., Ohayon, B., Park, K., Paul, N., Perez, P., Procureur, S., Radics, B., Regenfus, C., Reymond, J. -M., Reynaud, S., Rousse, J. -Y., Rousselle, O., Rubbia, A., Rzadkiewicl, J., Sacquin, Y., Schmidt-Kaler, F., Staszczak, M., Szymczyk, K., Tanaka, T., Tuchming, B., Vallage, B., Voronin, A., van der Werf, D. P., Wolf, S., Won, D., Wronka, S., Yamazaki, Y., Yoo, K. H., Yzombard, P., and Baker, C. J.

Subjects
Physics - Plasma Physics
Abstract

We present a description of the GBAR positron (e+) trapping apparatus, which consists of a three stage Buffer Gas Trap (BGT) followed by a High Field Penning Trap (HFT), and discuss its performance. The overall goal of the GBAR experiment is to measure the acceleration of the neutral antihydrogen (H) atom in the terrestrial gravitational field by neutralising a positive antihydrogen ion (H+), which has been cooled to a low temperature, and observing the subsequent H annihilation following free fall. To produce one H+ ion, about 10^10 positrons, efficiently converted into positronium (Ps), together with about 10^7 antiprotons (p), are required. The positrons, produced from an electron linac-based system, are accumulated first in the BGT whereafter they are stacked in the ultra-high vacuum HFT, where we have been able to trap 1.4(2) x 10^9 positrons in 1100 seconds.

Published
2022
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4. Positron production using a 9 MeV electron linac for the GBAR experiment

Author

Charlton, M., Choi, J. J., Chung, M., Clade, P., Comini, P., Crepin, P-P., Crivelli, P., Dalkarov, O., Debu, P., Dodd, L., Douillet, A., Guellati-Khelifa, S., Hervieux, P-A., Hilico, L., Husson, A., Indelicato, P., Janka, G., Jonsell, S., Karr, J-P., Kim, B. H., Kim, E-S., Kim, S. K., Ko, Y., Kosinski, T., Kuroda, N., Latacz, B., Lee, H., Lee, J., Leite, A. M. M., Leveque, K., Lim, E., Liszkay, L., Lotrus, P., Louvradoux, T., Lunney, D., Manfredi, G., Mansoulie, B., Matusiak, M., Mornacchi, G., Nesvizhevsky, V. V., Nez, F., Niang, S., Nishi, R., Nourbaksh, S., Park, K. H., Paul, N., Perez, P., Procureur, S., Radics, B., Regenfus, C., Rey, J-M., Reymond, J-M., Reynaud, S., Rousse, J-Y., Rousselle, O., Rubbia, A., Rzadkiewicz, J., Sacquin, Y., Schmidt-Kaler, F., Staszczak, M., Tuchming, B., Vallage, B., Voronin, A., Welker, A., van der Werf, D. P., Wolf, S., Won, D., Wronka, S., Yamazaki, Y., and Yoo, K-H.

Subjects
Physics - Instrumentation and Detectors
Abstract

For the GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment at CERN's Antiproton Decelerator (AD) facility we have constructed a source of slow positrons, which uses a low-energy electron linear accelerator (linac). The driver linac produces electrons of 9 MeV kinetic energy that create positrons from bremsstrahlung-induced pair production. Staying below 10 MeV ensures no persistent radioactive activation in the target zone and that the radiation level outside the biological shield is safe for public access. An annealed tungsten-mesh assembly placed directly behind the target acts as a positron moderator. The system produces $5\times10^7$ slow positrons per second, a performance demonstrating that a low-energy electron linac is a superior choice over positron-emitting radioactive sources for high positron flux., Comment: published in NIM A. 33 pages 9 figures

Published
2020
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5. Publisher Erratum: Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud

Author

Adrich, P., Blumer, P., Caratsch, G., Chung, M., Cladé, P., Comini, P., Crivelli, P., Dalkarov, O., Debu, P., Douillet, A., Drapier, D., Froelich, P., Garroum, N., Guellati-Khelifa, S., Guyomard, J., Hervieux, P.-A., Hilico, L., Indelicato, P., Jonsell, S., Karr, J.-P., Kim, B., Kim, S., Kim, E.-S., Ko, Y. J., Kosinski, T., Kuroda, N., Latacz, B. M., Lee, B., Lee, H., Lee, J., Lim, E., Liszkay, L., Lunney, D., Manfredi, G., Mansoulié, B., Matusiak, M., Nesvizhevsky, V., Nez, F., Niang, S., Ohayon, B., Park, K., Paul, N., Pérez, P., Regenfus, C., Reynaud, S., Roumegou, C., Roussé, J.-Y., Sacquin, Y., Sadowski, G., Sarkisyan, J., Sato, M., Schmidt-Kaler, F., Staszczak, M., Szymczyk, K., Tanaka, T. A., Tuchming, B., Vallage, B., Voronin, A., van der Werf, D. P., Welker, A., Won, D., Wronka, S., Yamazaki, Y., Yoo, K.-H., and Yzombard, P.

Published
2023
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9. A pulsed high-voltage decelerator system to deliver low-energy antiprotons

Author

Husson, A., Kim, B.H., Welker, A., Charlton, M., Choi, J.J., Chung, M., Cladé, P., Comini, P., Crépin, P.-P., Crivelli, P., Dalkarov, O., Debu, P., Dodd, L., Douillet, A., Guellati-Khélifa, S., Garroum, N., Hervieux, P.-A., Hilico, L., Indelicato, P., Janka, G., Jonsell, S., Karr, J.-P., Kim, E.-S., Kim, S.K., Ko, Y., Kosinski, T., Kuroda, N., Latacz, B., Lee, H., Lee, J., Leite, A.M.M., Lévêque, K., Lim, E., Liszkay, L., Lotrus, P., Lunney, D., Manfredi, G., Mansoulié, B., Matusiak, M., Mornacchi, G., Nesvizhevsky, V.V., Nez, F., Niang, S., Nishi, R., Nourbaksh, S., Park, K.H., Paul, N., Pérez, P., Procureur, S., Radics, B., Regenfus, C., Reymond, J.-M., Reynaud, S., Roussé, J.-Y., Rousselle, O., Rubbia, A., Rzadkiewicz, J., Sacquin, Y., Schmidt-Kaler, F., Staszczak, M., Tuchming, B., Vallage, B., Voronin, A., van der Werf, D.P., Wolf, S., Won, D., Wronka, S., Yamazaki, Y., and Yoo, K.-H.

Published
2021
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10. Corrigendum to “Positron accumulation in the GBAR experiment” [Nucl. Inst. Method. Phys. Res. A 1040 (2022) 167263]

Author

Baker, C.J., Blumer, P., Charlton, M., Chung, M., Cladé, P., Comini, P., Crivelli, P., Dalkarov, O., Debu, P., Dodd, L., Douillet, A., Guellati, S., Hervieux, P.A., Hilico, L., Husson, A., Indelicato, P., Janka, G., Jonsell, S., Karr, J.P., Kim, B.H., Kim, E.S., Kim, S.K., Ko, Y., Kosinski, T., Kuroda, N., Latacz, B.M., Lee, B., Lee, H., Lee, J., Leite, A.M.M., Lévêque, K., Lim, E., Liszkay, L., Lotrus, P., Lunney, D., Manfredi, G., Mansoulié, B., Matusiak, M., Mornacchi, G., Nesvizhevsky, V., Nez, F., Niang, S., Nishi, R., Ohayon, B., Park, K., Paul, N., Pérez, P., Procureur, S., Radics, B., Regenfus, C., Reymond, J.-M., Reynaud, S., Roussé, J.-Y., Rousselle, O., Rubbia, A., Rzadkiewicz, J., Sacquin, Y., SchmidtKaler, F., Staszczak, M., Szymczyk, K., Tanaka, T., Tuchming, B., Vallage, B., Voronin, A., van der Werf, D.P., Wolf, S., Won, D., Wronka, S., Yamazaki, Y., Yoo, K.H., and Yzombard, P.

Published
2025
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11. Profil tomodensitométrique thoracique et spirométrique des anciens tuberculeux pulmonaires traités et guéris au service de pneumologie du CHR de Saint-Louis

Author

Niang, S., primary, Thiam, O.R., additional, Dieye, A., additional, Mbaye, F.B.R., additional, Cissé, M.F., additional, Niang, A., additional, Agne, P.S., additional, Thiam, Kh., additional, Ndiaye, E.M., additional, Dia, Y., additional, Diatta, A., additional, and Touré, N.O., additional

Published
2024
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18. Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud

Author

Adrich, P., primary, Blumer, P., additional, Caratsch, G., additional, Chung, M., additional, Cladé, P., additional, Comini, P., additional, Crivelli, P., additional, Dalkarov, O., additional, Debu, P., additional, Douillet, A., additional, Drapier, D., additional, Froelich, P., additional, Garroum, N., additional, Guellati-Khelifa, S., additional, Guyomard, J., additional, Hervieux, P.-A., additional, Hilico, L., additional, Indelicato, P., additional, Jonsell, S., additional, Karr, J.-P., additional, Kim, B., additional, Kim, S., additional, Kim, E.-S., additional, Ko, Y. J., additional, Kosinski, T., additional, Kuroda, N., additional, Latacz, B. M., additional, Lee, B., additional, Lee, H., additional, Lee, J., additional, Lim, E., additional, Liszkay, L., additional, Lunney, D., additional, Manfredi, G., additional, Mansoulié, B., additional, Matusiak, M., additional, Nesvizhevsky, V., additional, Nez, F., additional, Niang, S., additional, Ohayon, B., additional, Park, K., additional, Paul, N., additional, Pérez, P., additional, Regenfus, C., additional, Reynaud, S., additional, Roumegou, C., additional, Roussé, J.-Y., additional, Sacquin, Y., additional, Sadowski, G., additional, Sarkisyan, J., additional, Sato, M., additional, Schmidt-Kaler, F., additional, Staszczak, M., additional, Szymczyk, K., additional, Tanaka, T. A., additional, Tuchming, B., additional, Vallage, B., additional, Voronin, A., additional, van der Werf, D. P., additional, Welker, A., additional, Won, D., additional, Wronka, S., additional, Yamazaki, Y., additional, Yoo, K.-H., additional, and Yzombard, P., additional

Published
2023
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20. Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud

Author

Adrich, P, Blumer, P, Caratsch, G, Chung, M, Cladé, P, Comini, P, Crivelli, P, Dalkarov, O, Debu, P, Douillet, A, Drapier, D, Froelich, P, Garroum, N, Guellati-Khelifa, S, Guyomard, J, Hervieux, P-A, Hilico, L, Indelicato, P, Jonsell, S, Karr, J-P, Kim, B, Kim, S, Kim, E-S, Ko, Y.J, Kosinski, T, Kuroda, N, Latacz, B.M, Lee, B, Lee, H, Lee, J, Lim, E, Liszkay, L, Lunney, D, Manfredi, G, Mansoulié, B, Matusiak, M, Nesvizhevsky, V, Nez, F, Niang, S, Ohayon, B, Park, K, Paul, N, Pérez, P, Regenfus, C, Reynaud, S, Roumegou, C, Roussé, J-Y, Sacquin, Y, Sadowski, G, Sarkisyan, J, Sato, M, Schmidt-Kaler, F, Staszczak, M, Szymczyk, K, Tanaka, T.A, Tuchming, B, Vallage, B, Voronin, A, van der Werf, D.P, Won, D, Wronka, S, Yamazaki, Y, Yoo, K-H, Yzombard, P, Laboratoire Kastler Brossel (LKB [Collège de France]), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Université d'Évry-Val-d'Essonne (UEVE), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and Institut Laue-Langevin (ILL)

Subjects
antihydrogen, production, CERN Lab, Physics - Instrumentation and Detectors, background, anti-p, beam, positron, beam, atom, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), antihydrogen, beam, charge exchange, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), positronium, target, electron, linear accelerator, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], cloud, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Abstract

International audience; We report on the first production of an antihydrogen beam by charge exchange of 6.1 keV antiprotons with a cloud of positronium in the GBAR experiment at CERN. The antiproton beam was delivered by the AD/ELENA facility. The positronium target was produced from a positron beam itself obtained from an electron linear accelerator. We observe an excess over background indicating antihydrogen production with a significance of 3-4 standard deviations.

Published
2023

23. AD-7/GBAR status report for the 2023 CERN SPSC

Author

Lunney, D, Roumegou, C, Blumer, P, Caratsch, G, Crivelli, P, Ohayon, B, Regenfus, C, Sarkisyan, J, Nesvizhevsky, V, Sacquin, Y, Vallage, B, Liszkay, L, Debu, P, Comini, P, Roussé, J-Y, Tuchming, B, Mansoulié, B, Niang, S, Pérez, P, Sadowski, G, Schmidt-Kaler, F, Indelicato, P, Drapier, D, Guellati, S, Hilico, L, Cladé, P, Douillet, A, Karr, J-P, Nez, F, Yzombard, P, Paul, N, Reynaud, S, van der Werf, DP, Jonsell, S, Froelich, P, Kim, B, Kim, S, Lee, B, Lee, H, Park, K, Won, D, Lee, J, Ko, Y, Kim, E-S, Lim, E, Chung, M, Yoo, K-H, Hervieux, P-A, Manfredi, G, Yamazaki, Y, Kuroda, N, Tanaka, T, Sato, M, Kosinski, T, Matusiak, M, Staszczak, M, Wronka, S, Adrich, P, and Szymczyk, K

Subjects
Detectors and Experimental Techniques
Abstract

We report on the activities performed during 2022 and the plans for 2023 for the GBAR experiment.

Published
2023

29. Positron accumulation in the GBAR experiment

Author

Blumer, P., primary, Charlton, M., additional, Chung, M., additional, Cladé, P., additional, Comini, P., additional, Crivelli, P., additional, Dalkarov, O., additional, Debu, P., additional, Dodd, L., additional, Douillet, A., additional, Guellati, S., additional, Hervieux, P.-A., additional, Hilico, L., additional, Husson, A., additional, Indelicato, P., additional, Janka, G., additional, Jonsell, S., additional, Karr, J.-P., additional, Kim, B.H., additional, Kim, E.S., additional, Kim, S.K., additional, Ko, Y., additional, Kosinski, T., additional, Kuroda, N., additional, Latacz, B.M., additional, Lee, B., additional, Lee, H., additional, Lee, J., additional, Leite, A.M.M., additional, Lévêque, K., additional, Lim, E., additional, Liszkay, L., additional, Lotrus, P., additional, Lunney, D., additional, Manfredi, G., additional, Mansoulié, B., additional, Matusiak, M., additional, Mornacchi, G., additional, Nesvizhevsky, V., additional, Nez, F., additional, Niang, S., additional, Nishi, R., additional, Ohayon, B., additional, Park, K., additional, Paul, N., additional, Pérez, P., additional, Procureur, S., additional, Radics, B., additional, Regenfus, C., additional, Reymond, J.-M., additional, Reynaud, S., additional, Roussé, J.-Y., additional, Rousselle, O., additional, Rubbia, A., additional, Rzadkiewicz, J., additional, Sacquin, Y., additional, Schmidt-Kaler, F., additional, Staszczak, M., additional, Szymczyk, K., additional, Tanaka, T., additional, Tuchming, B., additional, Vallage, B., additional, Voronin, A., additional, van der Werf, D.P., additional, Wolf, S., additional, Won, D., additional, Wronka, S., additional, Yamazaki, Y., additional, Yoo, K.H., additional, Yzombard, P., additional, and Baker, C.J., additional

Published
2022
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30. C97: Valeur pronostique de la galectine-3, de cytokines de l’inflammation, de l’apoptose et l’activation lymphocytaire dans les cancers du sein

Author

Niang, DGM, primary, Mbengue, B, additional, Diouf, D, additional, Ndiaye, R, additional, Ka, S, additional, Folly, MG, additional, Diop, JPD, additional, Mbow, M, additional, Ndiaye Diallo, R, additional, Ndiaye Dièye, T, additional, Niang, S, additional, Dème, M, additional, Dème, A, additional, and Dièye, A, additional

Published
2022
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38. Positron production using a 9 MeV electron linac for the GBAR experiment

Author

Charlton, M., Choi, J. J., Chung, M., Cladé, P., Comini, P., Crépin, P.-P., Crivelli, P., Dalkarov, O., Debu, P., Dodd, L., Douillet, A., Guellati-Khélifa, S., Hervieux, P.-A., Hilico, L., Husson, A., Indelicato, P., Janka, G., Jonsell, Svante, Karr, J.-P., Kim, B. H., Kim, E.-S., Kim, S. K., Ko, Y., Kosinski, T., Kuroda, N., Latacz, B., Lee, H., Lee, J., Leite, A. M. M., Lévêque, K., Lim, E., Liszkay, L., Lotrus, P., Louvradoux, T., Lunney, D., Manfredi, G., Mansoulié, B., Matusiak, M., Mornacchi, G., Nesvizhevsky, V. V., Nez, F., Niang, S., Nishi, R., Nourbaksh, S., Park, K. H., Paul, N., Pérez, P., Procureur, S., Radics, B., Regenfus, C., Rey, J.-M., Reymond, J.-M., Reynaud, S., Roussé, J.-Y., Rousselle, O., Rubbia, A., Rzadkiewicz, J., Sacquin, Y., Schmidt-Kaler, F., Staszczak, M., Tuchming, B., Vallage, B., Voronin, A., Welker, A., van der Werf, D. P., Wolf, S., Won, D., Wronka, S., Yamazaki, Y., Yoo, K.-H., Charlton, M., Choi, J. J., Chung, M., Cladé, P., Comini, P., Crépin, P.-P., Crivelli, P., Dalkarov, O., Debu, P., Dodd, L., Douillet, A., Guellati-Khélifa, S., Hervieux, P.-A., Hilico, L., Husson, A., Indelicato, P., Janka, G., Jonsell, Svante, Karr, J.-P., Kim, B. H., Kim, E.-S., Kim, S. K., Ko, Y., Kosinski, T., Kuroda, N., Latacz, B., Lee, H., Lee, J., Leite, A. M. M., Lévêque, K., Lim, E., Liszkay, L., Lotrus, P., Louvradoux, T., Lunney, D., Manfredi, G., Mansoulié, B., Matusiak, M., Mornacchi, G., Nesvizhevsky, V. V., Nez, F., Niang, S., Nishi, R., Nourbaksh, S., Park, K. H., Paul, N., Pérez, P., Procureur, S., Radics, B., Regenfus, C., Rey, J.-M., Reymond, J.-M., Reynaud, S., Roussé, J.-Y., Rousselle, O., Rubbia, A., Rzadkiewicz, J., Sacquin, Y., Schmidt-Kaler, F., Staszczak, M., Tuchming, B., Vallage, B., Voronin, A., Welker, A., van der Werf, D. P., Wolf, S., Won, D., Wronka, S., Yamazaki, Y., and Yoo, K.-H.

Abstract

For the GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment at CERN's Antiproton Decelerator (AD) facility we have constructed a source of slow positrons, which uses a low-energy electron linear accelerator (linac). The driver linac produces electrons of 9 MeV kinetic energy that create positrons from bremsstrahlung-induced pair production. Staying below 10 MeV ensures no persistent radioactive activation in the target zone and that the radiation level outside the biological shield is safe for public access. An annealed tungsten-mesh assembly placed directly behind the target acts as a positron moderator. The system produces 5 x 10(7) slow positrons per second, a performance demonstrating that a low-energy electron linac is a superior choice over positron-emitting radioactive sources for high positron flux.

Published
2021
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42. APPORT DU TEST XPERT MTB/RIF DANS LE DIAGNOSTIC DE LA TUBERCULOSE TOUTE FORME A SAINT-LOUIS.

Author

Niang, S., MBaye, F. B. R., Cisse, M. F., Gueye, Dia D., Ndiaye, E. M., Dieye, A., Thiam, K. H., Kane, Y. D., Diatta, A., and Touré Badiane, N. O.

Abstract

Introduction: The Xpert MTB / RIF assay has a dual advantage on the one hand, the rapid diagnosis of even difficult cases by the standard technique of direct microscopic examination and on the other hand by the detection of resistance to rifampicin. Our objective was to determine the contribution of the Xpert test in the diagnosis of tuberculosis of all forms. Materials and method: retrospective, descriptive and analytical study carried out in the Pneumophtisiology department of the CHRU of Saint-Louis. All suspected tuberculosis cases who had received an Xpert test from 2018 to 2020 were included. The parameters studied were socio-demographic, clinical and biological data. Results: 524 patient records included in the study with a sex ratio of 1.3. The mean age of the patients was 37 +/- 15 years. There were 285 positive GeneXpert samples, of which 224 were of pulmonary origin and 61 of extra-pulmonary origin. The number of rifampicin resistant samples was five, all of respiratory origin. Conclusion: the Xpert test is a new molecular technique recommended by the WHO in the diagnosis of pulmonary tuberculosis. [ABSTRACT FROM AUTHOR]

Published
2022

48. Positron production using a 9 MeV electron linac for the GBAR experiment

Author

Charlton, M., primary, Choi, J.J., additional, Chung, M., additional, Cladé, P., additional, Comini, P., additional, Crépin, P.-P., additional, Crivelli, P., additional, Dalkarov, O., additional, Debu, P., additional, Dodd, L., additional, Douillet, A., additional, Guellati-Khélifa, S., additional, Hervieux, P.-A., additional, Hilico, L., additional, Husson, A., additional, Indelicato, P., additional, Janka, G., additional, Jonsell, S., additional, Karr, J.-P., additional, Kim, B.H., additional, Kim, E.-S., additional, Kim, S.K., additional, Ko, Y., additional, Kosinski, T., additional, Kuroda, N., additional, Latacz, B., additional, Lee, H., additional, Lee, J., additional, Leite, A.M.M., additional, Lévêque, K., additional, Lim, E., additional, Liszkay, L., additional, Lotrus, P., additional, Louvradoux, T., additional, Lunney, D., additional, Manfredi, G., additional, Mansoulié, B., additional, Matusiak, M., additional, Mornacchi, G., additional, Nesvizhevsky, V.V., additional, Nez, F., additional, Niang, S., additional, Nishi, R., additional, Nourbaksh, S., additional, Park, K.H., additional, Paul, N., additional, Pérez, P., additional, Procureur, S., additional, Radics, B., additional, Regenfus, C., additional, Rey, J.-M., additional, Reymond, J.-M., additional, Reynaud, S., additional, Roussé, J.-Y., additional, Rousselle, O., additional, Rubbia, A., additional, Rzadkiewicz, J., additional, Sacquin, Y., additional, Schmidt-Kaler, F., additional, Staszczak, M., additional, Tuchming, B., additional, Vallage, B., additional, Voronin, A., additional, Welker, A., additional, van der Werf, D.P., additional, Wolf, S., additional, Won, D., additional, Wronka, S., additional, Yamazaki, Y., additional, and Yoo, K.-H., additional

Published
2021
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