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Simulation study of electron drift and gas multiplication in Micro Pixel Chamber

Authors
Journal
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
0168-9002
Publisher
Elsevier
Publication Date
Volume
546
Issue
3
Identifiers
DOI: 10.1016/j.nima.2005.02.042
Keywords
  • Gaseous Detector
  • Micro-Pattern Detector
  • Imaging
  • 3D Simulation

Abstract

Abstract The physical processes of charge collection and gas multiplication of a Micro Pixel Chamber ( μ -PIC) were studied in detail using a three-dimensional (3D) simulation. The collection efficiencies of primary electrons and gas multiplication factors were calculated for several electrode structures. Based on those studies, we analyzed the optimization of the electrode structure of the μ -PIC, in order to obtain a high gas gain of more than 10 4 and a simultaneous suppression of discharges. Consequently, we found that these characteristics strongly depend on the substrate thickness and the anode diameter of the μ -PIC. In addition, a gas gain of 10 5 would be expected for a μ -PIC having a thick substrate of > 150 μ m .

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