2023/07/12 by A. Lanz, Lanz, A., C. Amsler +73 · 2 citations
Engineering · Physics and Astronomy · #Atomic Physics (physics.atom-ph) #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #Muon and positron interactions and applications #Particle Detector Development and Performance #Plasma Physics (physics.plasm-ph)
paper · pdf · doi:10.48550/arxiv.2307.06133
openalex publication_date 2023/07/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
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.