石墨烯质子探测器设计及探测响应仿真分析

安恒; 李得天; 文轩; 王鷁; 李存惠; 王光毅; 张晨光; 秦晓刚; 薛玉雄; 曹洲

doi:10.3969/j.issn.1006-7086.2020.02.009

石墨烯质子探测器设计及探测响应仿真分析

Design and FLUKA Simulation of Response for Graphene Proton Detector

摘要

摘要: 银河宇宙射线和地球辐射带的质子对航天器的电子系统带来严重辐射危害，准确测量质子能量和通量，可以分析太阳活动程度，感知空间态势，同时为航天器在轨安全运行提供数据支持。基于飞行时间法（TOF）和ΔE-E方法，采用石墨烯与硅（Si）半导体相结合的方式设计了宽能量范围的中高能质子探测器，通过在Si半导体探测器和量能器中间设置钽（Ta）降能片，有效地减小探测器的体积，实现小型化设计。利用FLUKA模拟仿真分析了石墨烯质子探测器对质子、电子和氦粒子的鉴别能力，结果表明，探测器的粒子鉴别能力优于90%。

Abstract: Protons which come from Galactic Cosmic Rays and radiation belt can pose serious radiation hazards to the electronics systems of spacecraft.Accurate measurement of proton flux and energy can analyze solar activity,aware space situation,and provide data support for the safe operation of spacecraft in orbit.Based on the Time of Fly(TOF)and ΔE-E,the medium and high energy proton detector with wide energy range is designed by combining grapheme with silicon semiconductor.By adding tantalum energy reducing ship between silicon semiconductor detector and energy measuring object,the size of detector is effectively reduced and miniaturized design is realized.The discrimination ability of grapheme proton detector for proton,electron and helium was analyzed by FLUKA.The results show that the particle identification ability of the detector is better than 90%.

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