Mars Ion and Neutral Particle Analyzer (MINPA) for Chinese Mars Exploration Mission (Tianwen-1): Design and ground calibration

作者：LingGao Kong,AiBing Zhang,Zhen Tian,XiangZhi Zheng,WenJing Wang,Bin Liu,Peter Wurz,Daniele Piazza,Adrian Etter,Bin Su,YaYa An,JianJing Ding,WenYa Li,Yong Liu,Lei Li,YiRen Li,Xu Tan,YueQiang Sun

摘要：The main objective of the Mars Ion and Neutral Particle Analyzer(MINPA)aboard the Chinese Mars Exploration Mission(Tianwen-1)is to study the solar wind-Mars interaction by measuring the ions and energetic neutral atoms(ENAs)near Mars.The MINPA integrates ion and ENA measurements into one sensor head,sharing the same electronics box.The MINPA utilizes a standard toroidal top-hat electrostatic analyzer(ESA)followed by a time of flight(TOF)unit to provide measurement of ions with energies from 2.8 eV to 25.9 keV and ENAs from 50 eV to 3 keV with a base time resolution of 4 seconds.Highly polished silicon single crystal substrates with an Al2O3 film coating are used to ionize the ENAs into positive ions.These ions can then be analyzed by the ESA and TOF,to determine the energy and masses of the ENAs.The MINPA provides a 360°×90°field of view(FOV)with 22.5°×5.4°angular resolution for ion measurement,and a 360°×9.7°FOV with 22.5°×9.7°angular resolution for ENA measurement.The TOF unit combines a-15 kV acceleration high voltage with ultra-thin carbon foils to resolve H+,He2+,He+,O+,O2+and CO2+for ion measurement and to resolve H and O(≥16 amu group)for ENA measurement.Here we present the design principle and describe our ground calibration of the MINPA.

发文机构：National Space Science Center Beijing Key Laboratory of Space Environment Exploration Key Laboratory of Science and Technology on Space Environment Situational Awareness University of Chinese Academy of Sciences Physics Institute State Key Laboratory of Space Weather University of Science and Technology of China National Astronomical Observatories

关键词：MARSIONenergeticneutralatomelectrostaticanalyzertimeofflight

分类号： F42[经济管理—产业经济]