OPTIMIZATION OF MICROSTRIP GAS CHAMBER DESIGN AND OPERATING-CONDITIONS

被引：41

作者：

BECKERS, T ^{[1
]}

BOUCLIER, R ^{[1
]}

GARABATOS, C ^{[1
]}

MILLION, G ^{[1
]}

SAULI, F ^{[1
]}

SHEKHTMAN, LI ^{[1
]}

机构：

[1] CERN,CH-1211 GENEVA 23,SWITZERLAND

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1994年 / 346卷 / 1-2期

关键词：

D O I：

10.1016/0168-9002(94)90691-2

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We discuss recent experimental and theoretical work aimed at optimizing the structure and operating conditions of microstrip gas chambers. In a systematic set of measurements we have found gas mixtures allowing high stable gains; the best results were obtained using argon-dimethylether in equal percentages (50-50), and mixtures of dimethylether and carbon dioxide. Detectors exhibit lower noise and better energy resolution when using high drift fields, i.e. above 5 kV/cm; in these conditions, stable gains in excess of 10(4) could be achieved. We also discuss a model to characterize the breakdown depending on the combined field strength at the edges of the anode and cathode strips; using a program that computes fields and gains and applying the discharge criterion, we have estimated the optimum geometry of the detectors. The results indicate that higher gains before discharges can be obtained for wide cathodes: as an example, for 10 mum anodes we predict an increase by a factor of 4 of the maximum gain when increasing the width of the cathode strips from 80 mum to 160 mum.

引用

页码：95 / 101

页数：7

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