THGEM-based two dimension position detector for low energy electron

Jiaqing YAN; Yuguang XIE; Tao HU; Junguang LYU; Li ZHOU

doi:10.11889/j.0253-3219.2016.hjs.39.090402

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THGEM-based two dimension position detector for low energy electron

NUCLEAR ELECTRONICS AND INSTRUMENTATION | 更新时间：2021-05-24

- THGEM-based two dimension position detector for low energy electron
- NUCLEAR TECHNIQUES Vol. 39, Issue 9, Article number: 090402(2016)
- 作者机构：
  
  1.核工业二九〇研究所韶关 512026
  2.核探测与核电子学国家重点实验室北京 100049
  3.中国科学院高能物理研究所北京 100049
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China;State Key Laboratory of Particle Detection and Electronics
- DOI：10.11889/j.0253-3219.2016.hjs.39.090402
  CLC： TL82
- Received：01 April 2016，
  
  Revised：21 June 2016，
  
  Published：2016-09
- 稿件说明：
移动端阅览
Jiaqing YAN, Yuguang XIE, Tao HU, et al. THGEM-based two dimension position detector for low energy electron[J]. Nuclear techniques, 2016, 39(9): 090402
DOI：

Jiaqing YAN, Yuguang XIE, Tao HU, et al. THGEM-based two dimension position detector for low energy electron[J]. Nuclear techniques, 2016, 39(9): 090402 DOI： 10.11889/j.0253-3219.2016.hjs.39.090402.

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（Thick Gaseous Electron Multiplier

THGEM）的二维位置探测器，位置分辨要求好于200μm，灵敏面积为50mm×50mm。THGEM的孔径为150μm、孔间距400μm、厚度100μm。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。根据模拟结果，优化了探测器的结构和设计。并用能量为5.9keV的X射线源

Fe测试不同工作气体的增益，单层最大增益好于1×10

，双层最大增益好于6×10

，能量分辨率好于23%。

Abstract

Background

The thick gaseous electron multiplier(THGEM)is homemade with the hole diameter of 150μm

pitch of 400μm

and thickness of 100μm.

Purpose

A THGEM-based 2D position detector is developed for low energy electron detection.

Methods

The influences of film's thickness

air-layer's thickness

etc

on the electron transfer efficiency and transverse diffusion were simulated by Geant4 and using the 5.9-keV X-rays

and the gas gain

energy resolution were measured in different gas mixtures.

Results

According to the simulation results

the design and structure of the detector were optimized and the maximum gas gain of single and double layer THGEMs reached 1×10

and 6×10

respectively

and the energy resolution was higher than 23% for both single-and double-layer THGEMs.

Conclusion

The spatial resolution is required less than 200μm in 50mm×50mm sensitive area.

关键词

Keywords

references

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