Nuclear Techniques ›› 2016, Vol. 39 ›› Issue (5): 50101-050101.doi: 10.11889/j.0253-3219.2016.hjs.39.050101

• SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS •     Next Articles

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

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

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China
  • Received:2015-10-14 Revised:2015-12-20 Online:2016-05-10 Published:2016-05-12
  • Supported by:

    Supported by National Natural Science Foundation of China(No.11475251, No.11275255)

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(1.33×10-4Pa). 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.

Key words: Synchrotron radiation facility, Ionization chamber, MCP, Ionization absorption spectrum, Energy resolution

CLC Number: 

  • TL99