Smorra C, Abbass F, Schweitzer D, Bohman M, Devine J D, Dutheil Y, Hobl A, Arndt B, Bauer B B, Devlin J A, Erlewein S, Fleck M, Jäger J I, Latacz B M, Micke P, Schiffelholz M, Umbrazunas G, Wiesinger M, Will C, Wursten E, Yildiz H, Blaum K, Matsuda Y, Mooser A, Ospelkaus C, Quint W, Soter A, Walz J, Yamazaki Y, Ulmer S
Institut für Physik, Johannes Gutenberg-Universität, Mainz, Germany.
RIKEN, Fundamental Symmetries Laboratory, Wako, Japan.
Rev Sci Instrum. 2023 Nov 1;94(11). doi: 10.1063/5.0155492.
Currently, the world's only source of low-energy antiprotons is the AD/ELENA facility located at CERN. To date, all precision measurements on single antiprotons have been conducted at this facility and provide stringent tests of fundamental interactions and their symmetries. However, magnetic field fluctuations from the facility operation limit the precision of upcoming measurements. To overcome this limitation, we have designed the transportable antiproton trap system BASE-STEP to relocate antiprotons to laboratories with a calm magnetic environment. We anticipate that the transportable antiproton trap will facilitate enhanced tests of charge, parity, and time-reversal invariance with antiprotons and provide new experimental possibilities of using transported antiprotons and other accelerator-produced exotic ions. We present here the technical design of the transportable trap system. This includes the transportable superconducting magnet, the cryogenic inlay consisting of the trap stack and detection systems, and the differential pumping section to suppress the residual gas flow into the cryogenic trap chamber.
目前，世界上低能反质子的唯一来源是位于欧洲核子研究组织（CERN）的AD/ELENA设施。迄今为止，所有关于单个反质子的精密测量都是在该设施进行的，这些测量为基本相互作用及其对称性提供了严格的测试。然而，设施运行产生的磁场波动限制了未来测量的精度。为了克服这一限制，我们设计了可运输的反质子阱系统BASE-STEP，将反质子转移到磁环境平静的实验室。我们预计，可运输的反质子阱将有助于利用反质子增强对电荷、宇称和时间反演不变性的测试，并为使用运输来的反质子和其他加速器产生的奇异离子提供新的实验可能性。我们在此展示可运输阱系统的技术设计。这包括可运输的超导磁体、由阱堆栈和检测系统组成的低温镶嵌件，以及用于抑制残余气体流入低温阱室的差动抽气部分。
