Thick silicon microstrip detectors simulation for PACT: Pair and Compton Telescope

详细信息    查看全文

• 作者：M. Khalil^a ; ^{khalilmohammad@hotmail.com" class="auth_mail" title="E-mail the corresponding author} ; P. Laurent^a ; ^b ; F. Lebrun^a ; ^b ; V. Tatischeff^c ; Y. Dolgorouky^a ; W. Bertoli^a ; E. Breelle^a
• 关键词：Silicon ; Gamma-ray ; Compton telescope ; DSSD ; Semiconductors ; Silvaco ; Detection
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2016
• 出版时间：1 November 2016
• 年：2016
• 卷：835
• 期：Complete
• 页码：74-85
• 全文大小：2171 K

文摘

PACT is a space borne Pair and Compton Telescope that aims to make a sensitive survey of the gamma-ray sky between 100 keV and 100 MeV. It is based upon two main components: a silicon-based gamma-ray tracker and a crystal-based calorimeter. In this paper we will explain the imaging technique of PACT as a Multi-layered Compton telescope (0.1–10 MeV) and its major improvements over its predecessor COMPTEL. Then we will present a simulation study to optimize the silicon tracker of PACT. This tracker is formed of thousands of identical silicon double sided strip detectors (DSSDs). We have developed a simulation model (using SILVACO) to simulate the DSSD performance while varying its thickness, impurity concentration of the bulk material, electrode pitch, and electrode width. We will present a comprehensive overview of the impact of each varied parameter on the DSSD performance, in view of the application to PACT. The considered DSSD parameters are its depletion voltage, capacitance, and leakage current. After the selection of the PACT DSSD, we will present a simulation of the performance of the PACT telescope in the 0.1–10 MeV range.