Optimisation of the spatial linearity in backgammon-type multi-wire gas proportional counters-The relevance of charge cloud distribution

被引:4
|
作者
Payne, A. T. [1 ]
Kimpton, J. A. [2 ]
Smale, L. F. [1 ]
Chantler, C. T. [1 ]
机构
[1] Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia
[2] Australian Synchrotron, Clayton, Vic 3168, Australia
来源
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2010年 / 619卷 / 1-3期
关键词
Spatial linearity; MWPC; Detector modelling; X-ray spectroscopy; AVALANCHE LOCALIZATION; POSITION; DETECTOR;
D O I
10.1016/j.nima.2009.12.022
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
The backgammon-type multi-wire gas proportional counter (MWPC) enables the detection of X-ray photons in two dimensions with a high degree of spatial linearity. An accurate simulation of the detector geometry is developed to further optimise the spatial linearity achievable, by modelling the ideal linear output and through mapping of the experimental residual signature. Three models are presented, each achieving considerable improvements on key linearity measures over previous work, and providing strong evidence for the dependence on charge cloud distribution. Linearity to micron levels across 24 mm are demonstrated for MWPCs. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:190 / 197
页数:8
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