摘要
时间投影室是广泛用于高能核物理实验径迹成像的探测器,近些年来经过改造后多用于低能核物理实验.小体积、大的能量动态范围以及近4π的可探测立体角范围,使时间投影室具备完整重建三维动力学的功能.时间投影室工作腔室中填充的气体既被作为探测器的工作介质,同时又被当作靶材料,即为活性靶时间投影室.为实现上述功能,可在探测器结构中引入微结构气体放大器,并在数据分析中引入三维径迹重建算法.本文阐释了活性靶时间投影室的工作原理,分析比较了其相对于传统固体靶的独特优势,概述了活性靶时间投影室结构设计所涉及的技术,包括场笼的设计、工作气体的选择原则、气体倍增技术以及读出技术,最后介绍了数据分析流程及方法,重点介绍了噪声分离、径迹识别和物理参量提取步骤.
The time projection chamber(TPC)is a well-known tracking detector which has been widely used in high-energy physics experiments.But nowadays it becomes a new fashion to be applied in low-energy nuclear physics experiments.It is very likely for TPC to reconstruct the 3-dimentional dynamics completely due to the smaller volume and a relatively large energy ranges.The gas filled in the TPC working chamber can be had as the working media as well as the target material.In that case,the TPC can also regarded as the so-called active-target TPC(AT-TPC).In order to realize the mentioned-above functions,the micro-structural gas amplifier is introduced into the detector structure and the 3-dimentional track reconstruction algorithm into data analysis.This paper introduced the working principle of the AT-TPC whose unique advantage was presented by comparing with the traditional solid target.As well the related technique involved in the design of the AT-TPC was summarized,such as the design of the cage,the selection rule of the working gas,the gas amplification technique and readout technique.The data analysis processing and method were also described.
作者
葛浩煜
许金艳
李奇特
边佳伟
赵月悦
罗嘉雯
楼建玲
GE Haoyu;XU Jinyan;LI Qite;BIAN Jiawei;ZHAO Yueyue;LO Kaman;LOU Jianling(School of Physics,Peking University,Beijing 100871,China)
出处
《物理实验》
2024年第1期1-13,共13页
Physics Experimentation
关键词
时间投影室
活性靶
径迹重建
time projection chamber
active target
track construction
