Transient behaviour and rate effects in resistive detectors

被引：8
作者：
Fraga, MM
Marques, RF [1 ]
Ivaniouchenkov, Y
de Lima, EP
Neves, F
Policarpo, AJPL
Bueno, CC
Gonçalves, JAC
Santos, MDD
Costa, L
Mendiratta, S
Monteiro, JH
机构：
[1] Univ Coimbra, Dept Fis, LIP Coimbra, Lab Instrumentacao & Fis Expt Particulas, P-3000 Coimbra, Portugal
[2] IPEN CNEN SP, BR-05508900 Sao Paulo, Brazil
[3] Pontificia Univ Catolica Sao Paulo, Dept Fis, BR-01303050 Sao Paulo, Brazil
[4] Univ Aveiro, Dept Fis, P-3800 Aveiro, Portugal
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1998年 / 419卷 / 2-3期
基金：
巴西圣保罗研究基金会;
关键词：
proportional counters; gaseous detectors; resistive electrodes;
D O I：
10.1016/S0168-9002(98)00825-0
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The dependence of the detection efficiency (or charge gain) of a resistive detector on the counting rate has been considered by several authors. The influence of the resistivity of the electrodes, the counter geometry and the gas mixture composition have also been studied. Most of those measurements assume a stationary regime. In the present work we report on studies of the transient behaviour of detectors with a resistive cathode for various counting rates, charge gains and detector geometries. We show that in some cases the time-decay curves can be fitted by a single exponential plus a constant term, while in others (higher charge gains or higher counting rates) a sum of two or even three exponentials plus the constant term is needed to fit the experimental data. A study of the electric properties of the dielectrics used is also presented and a comparison is made between these results and the data obtained under irradiation conditions. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：485 / 489
页数：5
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