Ionization chamber based on multichannel plate and its application on synchrotron radiation

Junqin LI; Ying ZOU; Zhenhua CHEN; Lian XUE; Yong WANG; Renzhong TAI

doi:10.11889/j.0253-3219.2016.hjs.39.050101

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Ionization chamber based on multichannel plate and its application on synchrotron radiation

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- Ionization chamber based on multichannel plate and its application on synchrotron radiation
- NUCLEAR TECHNIQUES Vol. 39, Issue 5, Article number: 050101(2016)
- 作者机构：
  
  中国科学院上海应用物理研究所嘉定园区上海 201800
  Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2016.hjs.39.050101
  CLC： TL99
- Received：14 October 2015，
  
  Accepted：2015-12-20，
  
  Published：25 January 2016
- 稿件说明：
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Junqin LI, Ying ZOU, Zhenhua CHEN, et al. Ionization chamber based on multichannel plate and its application on synchrotron radiation[J]. Nuclear techniques, 2016, 39(5): 050101
DOI：

Junqin LI, Ying ZOU, Zhenhua CHEN, et al. Ionization chamber based on multichannel plate and its application on synchrotron radiation[J]. Nuclear techniques, 2016, 39(5): 050101 DOI： 10.11889/j.0253-3219.2016.hjs.39.050101.

摘要

在同步辐射装置中

气体电离室是定标光束线能量和评估能量分辨率的一个重要实验装置。为了摆脱电极探针式电离室的气体展宽对束线能量分辨率测定的限制

本文将微通道板(Microchannel Plate

MCP)应用于同步辐射光束线中的电离室

研制成功了具有高能量分辨率的电离吸收谱的探测系统。利用此系统测量标准气体在X射线入射时的电离吸收谱

通过分析测量所得谱线中吸收峰的展宽

可获得光束线的仪器展宽

本文以Ar的吸收谱为例给出了测量结果。

Abstract

Background:

The measurement of energy resolution is an essential task for commissioning a beamline in synchrotron radiation facility. The ionization chamber plays an important role in the evaluation of energy resolution. The conventional type based on electrode probe has the disadvantage of a low detection upper limit for energy resolution due to collision broadening on peak profiles by high working pressure(up to 1.33Pa).

Purpose:

To improve the upper limit of resolution measurement

we aim to set up and deploy the ionization chamber based on multichannel plate(MCP) in China

including vacuum system

gas inlet system

detection system and data acquisition and processing system.

Methods:

Taking advantage of high amplification of a MCP detector

gas ionization absorption spectra can be measured under much low working pressure(1.33×10

-4

Pa). By analyzing the width of absorption peak

the instrument broadening caused by a beam line can be obtained.

Results:

An ionization chamber based on MCP can achieve higher upper limit than those based on electrode probe in evaluating energy resolution.

Conclusion:

A MCP ionization chamber provides an important diagnosis for energy resolution in commissioning high performance beamlines.

关键词

Keywords

references

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薛超凡 . 上海光源软X射线谱学显微光束线站的能量分辨率研究 . 上海:中国科学院上海应用物理研究所 , 2011 .

XUE Chaofan . Study of evaluating the energy resolution of the soft X-ray spectromicroscopy beamline at SSRF . Shanghai:Shanghai Institute of Applied Physics, Chinese Academy of Sciences , 2011 .

薛超凡 , 王勇 , 吴衍青 , . 软X射线光束线能量分辨率测量中气体压强对谱线的影响研究 . 核技术 , 2011 . 34 ( 8 ): 561 - 564 .

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