一种基于TOF×E方法的空间中能离子探测器设计与仿真  

Design and Simulation of the Space-based TOF×E Medium Energetic Ion Detector

作　　者：张伟杰 沈国红[1,3,4] 张珅毅 张贤国[1,3,4] 叶依众 ZHANG Weijie;SHEN Guohong;ZHANG Shenyi;ZHANG Xianguo;YE Yizhong(National Space Science Center,Chinese Academy of Sciences,Beijing 100190;University of Chinese Academy of Sciences,Beijing 100049;Beijing Key Laboratory of Space Environment Exploration,Beijing 100190;Key Laboratory of Environmental Space Situation Awareness Technology,Beijing 100190)

机构地区：[1]中国科学院国家空间科学中心,北京100190 [2]中国科学院大学,北京100049 [3]天基空间环境探测北京市重点实验室,北京100190 [4]中国科学院空间环境态势感知技术重点实验室,北京100190

出　　处：《空间科学学报》2023年第2期340-351,共12页Chinese Journal of Space Science

基　　金：国家重点研发计划项目资助(2020YFE0202100)。

摘　　要：对空间中几十keV到几MeV的中能离子进行成分、能谱和角分布进行测量,具有重要的科学价值和应用意义。中国在载人登月等深空探测计划中明确提出了对中能离子的探测需求,但当前尚未掌握中能离子测量技术。本文提出了一种基于SEE TOF×E方法的中能离子探测器方案,方案包括复合材料二次电子薄膜、电极、位置灵敏MCP探测器和SSD等核心部件的设计,可同时实现对5个方向的中能离子和4个方向的中能电子的测量。结合目前空间粒子探测载荷可实现的硬件时间分辨率、能量分辨率和仿真计算结果,可以发现,该设计可以在40 keV~5 MeV能量范围实现中能离子能谱测量;并能够对40 keV~5 MeV的H离子,45 keV~5MeV的He离子,130 keV~5 MeV的O离子和240 keV~5 MeV的Fe离子进行离子成分分辨;同时可实现对20~500 keV的电子进行能谱测量。This paper introduces a designing scheme of a medium energetic ion detector based on SEE TOF×E method,including key components such as secondary electron emission foils,electrodes,position sensitive MCP detector,and SSDs,which can simultaneously achieve both 5-directional medium energetic ions and 4-directional medium energetic electrons measurements.Based on the hardware time resolution and energy resolution limits that can be achieved by the current space-based particle detection payload,this paper presents a simulation analysis of the energy range and ion species resolution of the design scheme.The results show that this design scheme can achieve ion spectrum measurement in the energy range of 40 keV to 5 MeV,and electron spectrum measurement from 20 to 500 keV as well.And it can also perform ion component resolution for proton at 40 keV to 5 MeV,He ions at 45 keV to 5 MeV,O ions at 130 keV to 5 MeV,and Fe ions at 240 keV to 5 MeV.

关 键 词：飞行时间法 质量分辨率 中能离子 中能电子 深空探测 

分 类 号：P353[天文地球—空间物理学] P354[天文地球—地球物理学]