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arXiv 1608.02652physics.ins-dethep-ex
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Mu2e电磁量能器的设计与现状

Design and status of the Mu2e electromagnetic calorimeter

N. Atanov, V. Baranov, J. Budagov, R. Carosi, F. Cervelli, F. Colao, M. Cordelli, G. Corradi, E. Dane', Yu. I. Davydov, S. Di Falco, S. Donati, R. Donghia, B. E… 展开作者

N. Atanov, V. Baranov, J. Budagov, R. Carosi, F. Cervelli, F. Colao, M. Cordelli, G. Corradi, E. Dane', Yu. I. Davydov, S. Di Falco, S. Donati, R. Donghia, B. Echenard, K. Flood, S. Giovannella, V. Glagolev, F. Grancagnolo, F. Happacher, D. G. Hitlin, M. Martini, S. Miscetti, T. Miyashita, L. Morescalchi, P. Murat, D. Pasciuto, G. Pezzullo, F. Porter, A. Saputi, I. Sarra, S. R. Soleti, F. Spinella, G. Tassielli, V. Tereshchenko, Z. Usubov, R. Y. Zhu

摘要:

费米实验室的Mu 2 e实验旨在测量负μ子到电子的无中微子转换,并在三年的数据采集后达到2.5x10^{-17}的单事件灵敏度。在最终状态下产生的单能电子由高精度跟踪器和晶体量热计检测,所有这些都嵌入在由宇宙射线否决系统包围的大型超导螺线管(SD)中。量热计是跟踪器的补充,允许独立的触发和强大的粒子识别,同时播种轨道重建并有助于去除模仿信号的背景轨道。为了满足这些要求,量热计应具有O(5)%的能量分辨率和在100 MeV时优于500 ps的时间分辨率。基线解决方案是由两个BaF 2晶体盘组成的量热计,其由UV扩展、日盲、雪崩光电二极管(APD)读取,其由JPL、Caltech、RMD财团开发。在本文中,热量计的设计,研究与开发研究进行到目前为止,工程的现状进行了描述。一个备份的替代设置由一个纯碘化铯晶体矩阵读取UV扩展滨松MPPC的也提出。

英文摘要:

The Mu2e experiment at Fermilab aims at measuring the neutrinoless conversion of a negative muon into an electron and reach a single event sensitivity of 2.5x10^{-17} after three years of data taking. The monoenergetic electron produced in the final state, is detected by a high precision tracker and a crystal calorimeter, all embedded in a large superconducting solenoid (SD) surrounded by a cosmic ray veto system. The calorimeter is complementary to the tracker, allowing an independent trigger and powerful particle identification, while seeding the track reconstruction and contributing to remove background tracks mimicking the signal. In order to match these requirements, the calorimeter should have an energy resolution of O(5)% and a time resolution better than 500 ps at 100 MeV. The baseline solution is a calorimeter composed of two disks of BaF2 crystals read by UV extended, solar blind, Avalanche Photodiode (APDs), which are under development from a JPL, Caltech, RMD consortium. In this paper, the calorimeter design, the R&D studies carried out so far and the status of engineering are described. A backup alternative setup consisting of a pure CsI crystal matrix read by UV extended Hamamatsu MPPC's is also presented.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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