CERN Accelerating science

Preprint
Report number	arXiv:2307.06133
Title	Upgrade of the positron system of the ASACUSA-Cusp experiment
Author(s)	Lanz, A. (Stefan Meyer Inst. Subatomare Phys. ; Vienna U.) ; Amsler, C. (Stefan Meyer Inst. Subatomare Phys.) ; Breuker, H. (Wako, RIKEN) ; Bumbar, M. (Stefan Meyer Inst. Subatomare Phys.) ; Chesnevskaya, S. (Stefan Meyer Inst. Subatomare Phys.) ; Costantini, G. (Brescia U. ; INFN, Pavia) ; Ferragut, R. (Milan, Polytech.) ; Giammarchi, M. (INFN, Milan) ; Gligorova, A. (Stefan Meyer Inst. Subatomare Phys.) ; Gosta, G. (Brescia U. ; INFN, Pavia) ; Higaki, H. (Hiroshima U.) ; Hunter, E.D. (Stefan Meyer Inst. Subatomare Phys.) ; Killian, C. (Stefan Meyer Inst. Subatomare Phys.) ; Kraxberger, V. (Stefan Meyer Inst. Subatomare Phys. ; Vienna U.) ; Kuroda, N. (Tokyo U.) ; Leali, M. (Brescia U. ; INFN, Pavia) ; Maero, G. (Milan U.) ; Malbrunot, C. (CERN) ; Mascagna, V. (Brescia U. ; INFN, Pavia) ; Matsuda, Y. (Tokyo U.) ; Mäckel, V. ; Migliorati, S. (Brescia U. ; INFN, Pavia) ; Murtagh, D.J. (Stefan Meyer Inst. Subatomare Phys.) ; Nanda, A. (Stefan Meyer Inst. Subatomare Phys. ; Vienna U.) ; Nowak, L. (Stefan Meyer Inst. Subatomare Phys. ; Vienna U. ; CERN) ; Gustafsson, F. Parnefjord (Stefan Meyer Inst. Subatomare Phys. ; CERN) ; Rheinfrank, S. (Stefan Meyer Inst. Subatomare Phys.) ; Romé, M. (Milan U.) ; Simon, M.C. (Stefan Meyer Inst. Subatomare Phys.) ; Tajima, M. (Nishina Ctr., RIKEN) ; Toso, V. (Milan, Polytech.) ; Uggerhøj, U. (Aarhus U.) ; Ulmer, S. (Wako, RIKEN) ; Venturelli, L. (Brescia U. ; INFN, Pavia) ; Weiser, A. (Stefan Meyer Inst. Subatomare Phys. ; Vienna U.) ; Widmann, E. (Stefan Meyer Inst. Subatomare Phys.) ; Yamazaki, Y. (Wako, RIKEN) ; Zmeskal, J. (Stefan Meyer Inst. Subatomare Phys.)
Imprint	2023-07-12
Number of pages	10
Note	10 pages, 5 figures, under consideration for the Special Collection "Non-Neutral Plasmas: Achievements and Perspectives" in JPP
Subject category	physics.plasm-ph ; Other Fields of Physics ; physics.atom-ph ; Other Fields of Physics
Accelerator/Facility, Experiment	CERN ASACUSA
Abstract	The ASACUSA-Cusp collaboration has recently upgraded the positron system to improve the production of antihydrogen. Previously, the experiment suffered from contamination of the vacuum in the antihydrogen production trap due to the transfer of positrons from the high pressure region of a buffer gas trap. This contamination reduced the lifetime of antiprotons. By adding a new positron accumulator and therefore decreasing the number of transfer cycles, the contamination of the vacuum has been reduced. Further to this, a new rare gas moderator and buffer gas trap, previously used at the Aarhus University, were installed. Measurements from Aarhus suggested that the number of positrons could be increased by a factor of four in comparison to the old system used at CERN. This would mean a reduction of the time needed for accumulating a sufficient number of positrons (of the order of a few million) for an antihydrogen production cycle. Initial tests have shown that the new system yields a comparable number of positrons to the old system.
Other source	Inspire
Copyright/License	preprint: (License: arXiv nonexclusive-distrib 1.0)