Dong, Yongwei 2009 POLAR的聚光能力

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Title:		Light collection of POLAR detector
Authors:		Dong, Yongwei; Li, Yanguo; Wu, Bobing; Zhang, Yongjie; Zhang, Shuangnan
Publication:		eprint arXiv:0907.2771
Publication Date:		07/2009
Origin:		ARXIV
Keywords:		Astrophysics - Instrumentation and Methods for Astrophysics
Comment:		5 pages, accepted by Sci China Ser G-Phys Mech Astron. 2009
Bibliographic Code:		2009arXiv0907.2771D

Abstract

POLAR is a compact polarimeter dedicated to measure the polarization of GRBs between 50-300 keV. The light collection of 200*6*6mm3 plastic bars has been simulated and optimized in order to get uniform response to x-rays at different points of one single bar. According to the Monte Carlo results, the amplitude uniformity strongly depends on the polishing level of scintillator surface and the covering. A uniformity of 89% is achieved with a prototype constructed by a non position-sensitive PMT and an array of 4X4 bars.

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