Calibration of Mars Energetic Particle Analyzer (MEPA)

IF 2.9 3区地球科学

Earth and Planetary Physics Pub Date : 2020-08-18 DOI:10.26464/epp2020055

ShuWen Tang, Yi Wang, HongYun Zhao, Fang Fang, Yi Qian, YongJie Zhang, HaiBo Yang, CunHui Li, Qiang Fu, Jie Kong, XiangYu Hu, Hong Su, ZhiYu Sun, YuHong Yu, BaoMing Zhang, Yu Sun, ZhiPeng Sun

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引用次数: 12

Abstract

The first Mars exploration mission of China (Tianwen-1) is scheduled to be launched in 2020; a charged particle telescope, the Mars Energetic Particle Analyzer (MEPA), is carried as one of the payloads on the orbiter. The MEPA is designed to measure solar energetic particles (SEPs) and galactic cosmic rays (GCRs) in the near-Mars space and in the transfer orbit from Earth to Mars. Before the launch, the MEPA was calibrated in ground experiments with radioactive sources, electronic pulses, and accelerator beams. The calibration parameters, such as energy conversion constants, threshold values for the triggers, and particle identification criteria, were determined and have been stored for onboard use. The validity of the calibration parameters has been verified with radioactive sources and beams. The calibration results indicate that the MEPA can measure charged particles reliably, as designed, and that it can satisfy the requirements of the Tianwen-1 mission.

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火星高能粒子分析仪(MEPA)的标定

中国的第一个火星探测任务(“天文一号”)计划于2020年发射;一个带电粒子望远镜，即火星高能粒子分析仪(MEPA)，是轨道飞行器上的有效载荷之一。MEPA旨在测量近火星空间和从地球到火星的转移轨道上的太阳高能粒子(sep)和银河宇宙射线(gcr)。在发射前，MEPA在地面实验中用放射源、电子脉冲和加速器束进行了校准。校准参数，如能量转换常数、触发阈值和粒子识别标准，已被确定并存储在船上使用。用放射源和射线验证了标定参数的有效性。标定结果表明，MEPA能够可靠地测量带电粒子，符合设计要求，能够满足“天文一号”任务的要求。

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来源期刊

Earth and Planetary Physics GEOSCIENCES, MULTIDISCIPLINARY-

自引率

17.20%

发文量

174