The physical processes of charge collection and gas multiplication of a Micro Pixel Chamber (mu-PIC) were studied in detail using a three-dimensional 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 mu-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 mu-PIC. In addition, a gas gain of 10^5 would be expected for a mu-PIC having a thick substrate of > 150um.
@article{arxiv.physics/0503223,
title = {Simulation study of electron drift and gas multiplication in Micro Pixel Chamber},
author = {Tsutomu Nagayoshi and Atsushi Takada and Hidetoshi Kubo and Kentaro Miuchi and Reiko Orito and Yoko Okada and Atsushi Takeda and Toru Tanimori and Masaru Ueno and Oleg Bouianov and Marina Bouianov},
journal= {arXiv preprint arXiv:physics/0503223},
year = {2009}
}
Comments
16 pages, 14 figures, Submitted to Nucl. Instr. Methods A