Influence of working gas properties on MWPC anode wire modulation effect

For MWPCs used for X-ray position detection, simulation studies of the anode wire modulation effect of the detector were carried out using the Garfield program. Different gas mixtures were used as the working gas in the simulation, so as to obtain the influence of the X-ray cross section and electro...

Full description

Saved in:
Bibliographic Details
Published inChinese physics C Vol. 39; no. 10; pp. 82 - 86
Main Author 王小胡 陈孝强
Format Journal Article
LanguageEnglish
Published 01.10.2015
Subjects
Anode effect
Detectors
Electron diffusion
Gas mixtures
Modulation
Simulation
Wire
X-rays
X射线
多丝正比室
工作气体
扩散系数
气体性质
气体混合物
调制效应
阳极
Online AccessGet full text
ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/39/10/106001

Cover

More Information
Summary:For MWPCs used for X-ray position detection, simulation studies of the anode wire modulation effect of the detector were carried out using the Garfield program. Different gas mixtures were used as the working gas in the simulation, so as to obtain the influence of the X-ray cross section and electron diffusion coefficient of the working gases on the anode wire modulation effect of an MWPC with anode wire spacing of 2 mm. Results show that, though a working gas with higher X-ray cross section implies a larger average drift distance for the ionized electrons, such gas mixtures are of little use in improving the anode wire modulation effect of MWPCs. It is found that the transverse electron diffusion coefficient is the determining factor for the extent of the anode wire modulation effect in the detector.
Bibliography:WANG Xiao-Hu,CHEN Xiao-Qiang（ Fundamental Science on Nuclear Waste and Environmental Security Laboratory, Southwest University of Science and Technology, Mianyang 621010, China School of National Defense Science and Technology, Southwest University of Science and Technology, Mianyang 621010, China）
11-5641/O4
Garfield simulation, anode wire modulation, working gas, MWPC
For MWPCs used for X-ray position detection, simulation studies of the anode wire modulation effect of the detector were carried out using the Garfield program. Different gas mixtures were used as the working gas in the simulation, so as to obtain the influence of the X-ray cross section and electron diffusion coefficient of the working gases on the anode wire modulation effect of an MWPC with anode wire spacing of 2 mm. Results show that, though a working gas with higher X-ray cross section implies a larger average drift distance for the ionized electrons, such gas mixtures are of little use in improving the anode wire modulation effect of MWPCs. It is found that the transverse electron diffusion coefficient is the determining factor for the extent of the anode wire modulation effect in the detector.
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/39/10/106001