基于国产THGEM的低能电子二维位置探测器研究
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- 英文论文题名：Study of THGEM-based two dimension position detectorfor low energy electron
- 论文作者：颜嘉庆 ; 谢宇广 ; 胡涛 ; 吕军光 ; 周莉
- 英文论文作者：YAN Jia-qing ; XIE Yu-guang ; HU Tao ; LU Jun-guang ; ZHOU Li ; University of South China ; State Key Laboratory of Particle Detection and Electronics ; Institute of High Energy Physics ; CAS
- 年：2014
- 作者机构：南华大学;核探测与核电子学国家重点实验室;中国科学院高能物理研究所;
- 论文关键词：厚型气体电子倍增器(THGEM) ; 低能电子 ; 二维位置 ; Geant4 ; Garfield
- 英文论文关键词：Thick Gas Electron Multipliers(THGEMs) ; low energy electron ; 2D position ; Geant4 ; Garfield
- 会议召开时间：2014-08-13
- 会议录名称：第十七届全国核电子学与核探测技术学术年会论文集
- 语种：中文
- 分类号：TL81
- 学会代码：HDZX
- 会议名称：第十七届全国核电子学与核探测技术学术年会
- 会议地点：中国甘肃兰州
- 主办单位：中国电子学会、中国核学会核电子学与核探测技术分会
- 学会名称：中国电子学会核电子学与核探测技术分会
- 页数：8
- 文件大小：787k
- 原文格式：D
- 会议级别：全国
摘要
为探测0.1~50MeV低能电子脉冲束流的位置分布,研制基于国产厚型气体电子倍增器(THGEM)的二维位置探测器,位置分辨要求好于200um,灵敏面积为50mm×50mm。THGEM的孔径为150um,孔间距400um,厚度100um。用能量为5.9keV的X射线源~(55)Fe测试不同工作气体的增益,单层最大增益好于1×10~4,双层最大增益好于6×10~4,能量分辨率好于23%。用Geant4模拟了薄膜窗厚度、空气层厚度等对电子透过率和横向扩散的影响,用Garfield模拟了电子雪崩的横向扩散。根据模拟结果,优化了探测器的结构和设计。
A THGEM-based 2D position detector is developed for low energy electron detection. The spatial resolution is required less than 200 um in 50mm×50mm sensitive area. The THGEM is homemade with 150 um hole diameter, 400 um pitch, and 100 um thickness. By using the 5.9 keV X-rays, the gas gain, energy resolution were measured in different gas mixtures. The maximum gas gain of single and double layer THGEMs reach 1*10~4 and 6*10~4,respectively, and the energy resolution is better than 23% for both single and double layer THGEMs,The influences of film's thickness, air-layer's thickness, etc., on the electron transfer efficiency and transverse diffusion were simulated by Geant4. And the transverse diffusion of the electron avalanche was also simulated by Garfield. According to the simulation results, the design and structure of the detector was optimized.
A THGEM-based 2D position detector is developed for low energy electron detection. The spatial resolution is required less than 200 um in 50mm×50mm sensitive area. The THGEM is homemade with 150 um hole diameter, 400 um pitch, and 100 um thickness. By using the 5.9 keV X-rays, the gas gain, energy resolution were measured in different gas mixtures. The maximum gas gain of single and double layer THGEMs reach 1*10~4 and 6*10~4,respectively, and the energy resolution is better than 23% for both single and double layer THGEMs,The influences of film's thickness, air-layer's thickness, etc., on the electron transfer efficiency and transverse diffusion were simulated by Geant4. And the transverse diffusion of the electron avalanche was also simulated by Garfield. According to the simulation results, the design and structure of the detector was optimized.
引文
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[6]M.Alexeev.Progress towards a THGEM-based detector of single photons[J].Nucl.Instrum.Meth.A,2011,639(1):130-133.
[7]A.Breskin.Cs I-THGEM gaseous photo multipliers for RICH and noble-liquid detectors[J].Nucl.Instrum.Meth.A,2011,639(1):117-120.
[8]Yuguang Xie.Development of Au-coated THGEM for single photon,charged particle,and neutron detection[J].Nucl.Instrum.Meth.A,2013,729(0):809-815.
[9]XIE Wen-Qing.Performance study of the PTFE-THGEM at room and low temperature[J].Chinese Physics C,2013,11(37):116001.
[10]He Zhan-ying.Experimental studies of THGEM in dierent Ar/CO2 mixtures[J].Chinese Physics C,2014,5(38):056003.
[2]C.Shalem.Advances in Thick GEM-like gaseous electron multipliers-Part I:atmospheric pressure operation[J].Nucl.Instrum.Meth.A,2006,558(2):475-489.
[3]A.Breskin.A concise review on THGEMdetectors[J].Nucl.Instrum.Meth.A,2009,598(1):107-111.
[4]Alexeev M.THGEM based photon detector for Cherenkov imaging applications[J].Nucl.Instrum.Meth.A,2010,617(1):396-397.
[5]马善乐.气体电子倍增器透过率和增益特性的研究[J].真空科学与技术学报,2013,33(3):228-234.
[6]M.Alexeev.Progress towards a THGEM-based detector of single photons[J].Nucl.Instrum.Meth.A,2011,639(1):130-133.
[7]A.Breskin.Cs I-THGEM gaseous photo multipliers for RICH and noble-liquid detectors[J].Nucl.Instrum.Meth.A,2011,639(1):117-120.
[8]Yuguang Xie.Development of Au-coated THGEM for single photon,charged particle,and neutron detection[J].Nucl.Instrum.Meth.A,2013,729(0):809-815.
[9]XIE Wen-Qing.Performance study of the PTFE-THGEM at room and low temperature[J].Chinese Physics C,2013,11(37):116001.
[10]He Zhan-ying.Experimental studies of THGEM in dierent Ar/CO2 mixtures[J].Chinese Physics C,2014,5(38):056003.