Beam particle tracking with a low-mass mini time projection chamber in the PEN experiment

Beam particle tracking with a low-mass mini time projection chamber in the PEN experiment
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PEN 实验中使用低质量微型时间投影室进行束流粒子跟踪

DOI:
10.1016/j.nima.2021.165460
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发表时间:
2021
期刊:
Detectors and Associated Equipment
影响因子:
--
通讯作者:
Kuchinsky, N.A.
Kuchinsky, N.A.
中科院分区:
--
文献类型:
--
作者:
Glaser, C.J.;Počanić, D.;van der Schaaf, A.;Baranov, V.A.;Khomutov, N.V.;Kravchuk, N.P.;Kuchinsky, N.A.

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国际PEN合作旨在获得介子电子衰变π+→e+ ν e (γ),即π e2的分支比,相对精度为5× 10−4或更好。PEN装置包括许多检测系统,所有这些系统都为PEN事件重建提供重要信息。本文讨论了用于介子、介子和正电子束流粒子跟踪的微型时间投影室(mTPC)的设计、性能和蒙特卡罗模拟。我们还回顾了在分析中提取的轨迹坐标的使用,特别是在构建对区分背景过程至关重要的观测值时,以及在最大限度地提高目标的基准体积时,衰减事件顶点可以被接受用于分支比提取而不会引入偏差。
The international PEN collaboration aims to obtain the branching ratio for the pion electronic decay π+→ e+ ν e (γ), aka π e 2, to a relative precision of 5× 1 0− 4 or better. The PEN apparatus comprises a number of detection systems, all contributing vital information to the PEN event reconstruction. This paper discusses the design, performance, and Monte Carlo simulation of the mini time projection chamber (mTPC) used for pion, muon, and positron beam particle tracking. We also review the use of the extracted trajectory coordinates in the analysis, in particular in constructing observables critical for discriminating background processes, and in maximizing the fiducial volume of the target in which decay event vertices can be accepted for branching ratio extraction without introducing bias.
DOI: 10.1136/ebmh.11.4.102
发表时间: 2008-10
期刊: Evidence Based Mental Health
影响因子: --
作者:
P. Cochat;L. Vaucoret;J. Sarles
通讯作者: P. Cochat;L. Vaucoret;J. Sarles