Antideuteron Identification in Space with Helium Calorimeter

F. Nozzoli, Irina Rashevskaya, L. Ricci, Francesco Rossi, Piero Spinnato, Enrico Verroi, P. Zuccon, Gregorio Giovanazzi
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Abstract

The search for low-energy antideuterons in cosmic rays allows the addressing of fundamental physics problems testing for the presence of primordial antimatter and the nature of Dark Matter. The PHeSCAMI (Pressurized Helium Scintillating Calorimeter for AntiMatter Identification) project aims to exploit the long-living metastable states of the helium target for the identification of low-energy antideuterons in cosmic rays. A space-based pressurized helium calorimeter would provide a characteristic identification signature based on the coincident detection of a prompt scintillation signal emitted by the antideuteron energy loss during the slowing-down phase in the gas, and the (≈µs) delayed scintillation signal provided by the charged pions produced in the subsequent annihilation. The performance of a high-pressure (200-bar) helium scintillator prototype, tested in the INFN-TIFPA laboratory, will be summarized.
利用氦量热器在太空中识别反氘核
寻找宇宙射线中的低能反氘核可以解决基础物理学问题,检验原始反物质的存在和暗物质的性质。PHeSCAMI(用于反物质识别的加压氦闪烁量热计)项目旨在利用氦靶的长寿命态来识别宇宙射线中的低能反氘核。天基加压氦热量计将提供一种特征性的识别信号,其基础是同时探测气体中减速阶段反氘核能量损失发出的快速闪烁信号和随后湮灭过程中产生的带电小离子提供的(≈µs)延迟闪烁信号。将总结在 INFN-TIFPA 实验室测试的高压(200 巴)氦闪烁器原型的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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