Charge diffusion in undepleted regions of silicon particle detectors: analysis and simulation

被引：5
|
作者：
Villani, EG [1 ]
机构：
[1] CLRC, Rutherford Appleton Lab, Chilton OX11 0QX, Didcot, England
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2005年 / 539卷 / 1-2期
关键词：
MIP; CMOS; MAPS;
D O I：
10.1016/j.nima.2004.10.017
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The process of diffusion of charge generated by a minimum ionizing particle (MIP) in undepleted silicon is analysed, with a view to accurately quantify its contribution to the total charge collected by particle detectors. Starting from physical principles, a simplified mathematical model is developed which relates collected charge and collection time to doping and thickness of semiconductor. The results are then compared with those obtained from a commercial simulator package. A least square method refinement is introduced. These general results can be applied to the specific case of CMOS monolithic active pixel sensors (MAPS) employed as particle detectors, where important contributions to charge collection stem from undepleted epitaxial layer and substrate. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：125 / 131
页数：7
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