ACTA

Accumulation of Positrons from a LINAC Based Source

S. Niang^a, M. Charlton^b, J.J. Choi^c, M. Chung^d, P. Cladé^e, P. Comini^a, P. Crivelli^f, P.P. Crépin^e, O. Dalkarov^g, P. Debu^a, L. Dodd^b, A. Douillet^{e, h}, P. Froehlichⁱ, J. Gafriller^j, S. Guellati^e, J. Heinrich^e, P.A. Hervieux^k, L. Hilico^{e, h}, A. Husson^l, P. Indelicato^e, G. Janka^f, S. Jonsellⁱ, J.P. Karr^{e, h}, B.H. Kim^c, E-S Kim^m, S.K. Kim^c, A. Kleyheeg^j, Y. Koⁿ, T. Kosinski^o, N. Kuroda^p, B. Latacz^a, H. Lee^c, J. Leeⁿ, A.M.M. Leite^a, E. Lim^m, L. Liszkay^a, T. Louvradoux^e, D. Lunney^l, K. Lévéque^k, G. Manfredi^k, B. Mansoulié^a, M. Matusiak^o, G. Mornacchi^j, V.V. Nesvizhevsky^q, F. Nez^e, R. Nishi^p, S. Nourbaksh^j, K.H. Park^c, N. Paul^e, P. Pérez^a, B. Radics^f, C. Regenfus^f, S. Reynaud^e, J.Y. Roussé^a, A. Rubbia^f, J. Rzadkiewicz^o, Y. Sacquin^a, F. Schmidt-Kaler^r, M. Staszczak^o, B. Tuchming^a, B. Vallage^a, D.P. van der Werf^b, A. Voronin^g, A. Welker^j, S. Wolf^r, D. Won^c, S. Wronka^o, Y. Yamazaki^s, K.H. Yoo^d, C.J. Baker^b
^aIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
^bDepartment of Physics, College of Science, Swansea University, Swansea SA2 8PP, United Kingdom
^cDepartment of Physics and Astronomy, Seoul National University, 1 Gwanak-Ro, Gwanak-gu, Seoul 08826, Korea
^dDepartment of Physics, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan 44919, Republic of Korea
^eLaboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France, Campus Pierre et Marie Curie, 4, pl. Jussieu, F-75005 Paris, France
^fInstitute for Particle Physics and Astrophysics, ETH Zurich, 8093 Zurich, Switzerland
^gP.N. Lebedev Physical Institute, 53 Leninsky Prospect, 119991 Moscow, Russia
^hUniversité d'Evry-Val d'Essonne, Université Paris-Saclay, Boulevard François Mitterand, F-91000 Evry, France
ⁱDepartment of Physics, Stockholm University, SE-10691 Stockholm, Sweden
^jCERN, 1211 Geneva 23, Switzerland
^kUniversité de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F-67000 Strasbourg, France
^lCSNSM-IN2P3-CNRS, Université de Paris Sud, Orsay, France
^mDepartment of Accelerator Science, Korea University Sejong Campus, Sejong-ro 2511, 30019 Sejong, Republic of Korea
ⁿCenter for Underground Physics, Institute for Basic Science, 70 Yuseong-daero 1689-gil, Yuseong-gu, Daejeon 34047, Korea
^oNational Centre for Nuclear Research (NCBJ), A. Soltana 7, 05-400 Otwock, Swierk, Poland
^pInstitute of Physics, University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan
^qInstitut Max von Laue - Paul Langevin (ILL), 71 av. des Martyrs, Grenoble, France, F-38042
^rQUANTUM, Institut für Physik, Johannes Gutenberg Universität, D-55128 Mainz, Germany
^sUlmer Fundamental Symmetries Laboratory, RIKEN, 2-1 Hirosawa, Wako, 351-0198, Saitama, Japan

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The GBAR experiment aims to measure the gravitational acceleration of antihydrogen H̅. It will use H̅⁺ ions formed by the interaction of antiprotons with a dense positronium cloud, which will require about 10¹⁰ positrons to produce one H̅⁺. We present the first results on the positron accumulation, reaching 3.8±0.4×10⁸ e⁺ collected in 560 s.

DOI:10.12693/APhysPolA.137.164
topics: positron plasma, positron accumulation, antimatter, Penning-Malmberg trap, Greaves-Surko trap, GBAR