Properties of straw tubes for the tracking detector of the COMET experiment

Properties of straw tubes for the tracking detector of the COMET experiment
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COMET实验跟踪探测器用吸管的特性

DOI:
10.1016/j.nima.2021.165242
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发表时间:
2021
期刊:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
影响因子:
--
通讯作者:
Tsamalaidze Z.
Tsamalaidze Z.
中科院分区:
--
文献类型:
--
作者:
Volkov A.;Evtoukhovich P.;Kravchenko M.;Kuno Y.;Mihara S.;Nishiguchi H.;Pavlov A.;Tsamalaidze Z.

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摘要COMET(相干μ子到电子跃迁,J-PARC,日本)是研究基本粒子物理标准模型(SM)扩展的实验之一。COMET实验的主要目的是寻找带电轻子味,它破坏了在原子核场中μ子到电子的无中微子转换(μ-e转换,μ-N→ e-N)。目标是实现对分支比上级的灵敏度超过10− 17,比当前极限小四个数量级。在实验中,将使用吸管探测器来测量来自μ-e转换的信号电子的动量。为了满足动量测量的要求,我们计划开发一种平面跟踪装置,该装置由极轻材料制成的薄壁吸管组成,以减少多次散射,并且能够在真空中操作。研究秸秆的力学性能可以选择其最佳张力,估算温度和湿度的影响,评估秸秆在实验中的使用寿命,我们定义为张力松弛到最小工作值的时间。
Abstract COMET (Coherent Muon to Electron Transition, J-PARC, Japan) is one of the experiments that studies extensions of the Standard Model (SM) of elementary particle physics. The main purpose of the COMET experiment is to search for charged lepton flavor violating neutrinoless conversion of muons into electrons in the field of a nucleus (μ–e conversion, μ–N→ e–N). The goal is to achieve a sensitivity to the branching ratio superior to 10− 17, that four orders of magnitude smaller than the present limit. In the experiment a straw detector will be used to measure the momentum of the signal electrons from the μ–e conversion. In order to satisfy the requirements of the momentum measurements, we plan to develop a planar tracking device consisting of thin-wall straws made with an extremely light material to reduce multiple scattering and that is capable of operation in vacuum. Research the mechanical properties of straws will allow us to choose their optimal tension, to estimate the influence of the temperature and humidity, to assess the straws service life in the experiment, which we define as the tension relaxation time to the minimum working value.
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