First results of the low energy ion spectrometer onboard a Chinese geosynchronous satellite  

作　　者：SHAN Xu MIAO Bin CAO Zhe SUN ZhenYu LI YiRen LIU Kai GUO XingYu QU SanBiao SU ZhenPeng SHEN ChengLong PAN ZongHao LI Xin HAO XinJun YANG XiaoPing TIAN Chao JIANG Yu LIU ShuBin AN Qi CHEN XiangJun WANG YuMing 

机构地区：[1]Hefei National Research Center for Physical Sciences at the Microscale,Department of Modern Physics,University of Science and Technology of China,Hefei,230026,China [2]CAS Key Laboratory of Geospace Environment,School of Earth and Space Sciences,University of Science and Technology of China,Hefei,230026,China [3]State Key Laboratory of Particle Detection and Electronics(IHEP-USTC),Department of Modern Physics,University of Science and Technology of China,Hefei,230026,China [4]Shandong Institute of Space Electronic Technology,Yantai,264003,China [5]State Key Laboratory of Astronautic Dynamics,Xi’an Satellite Control Center,Xi’an,710043,China [6]CAS Center for Excellence in Comparative Planetology,University of Science and Technology of China,Hefei,230026,China

出　　处：《Science China(Technological Sciences)》2023年第5期1378-1384,共7页中国科学（技术科学英文版）

基　　金：supported by the grants from Chinese Academy of Sciences(Grant Nos.XDB41000000,QYZDB-SSW-DQC015);the National Natural Science Foundation of China(Grant No.42188101)。

摘　　要：A Chinese geosynchronous satellite was launched on June 23,2020.It carried a plasma detection package to monitor the space environment around the orbit.Here we report the inflight performance of a low energy ion spectrometer(LEIS),one of the primary instruments in the plasma detection package,and its initial observations in flight.Benefiting from the state-of-the-art design of a top-hat electrostatic analyzer cooperated with angular scanning deflectors,three-dimensional measurement of ions in space with a large field of view of 360°×90°and a wide energy range from 50 eV to 25 keV per charge has been achieved.The differential energy flux spectra of ions around the orbit have shown clear signatures of surface charging and storm/substorm ion injections.The occurrence of surface charging could be caused by the lack of photoemission at the Earth's eclipse(near the midnight)or the storm energetic electron injection at the dawn sector.The present results demonstrated a good performance of the LEIS payload in flight for monitoring the space ion environment around the orbit.In situ measurements of the LEIS payload provide us an opportunity to understand the magnetospheric ion dynamics and forecast the associate space weather impacts.

关 键 词：low energy ion spectrometer geosynchronous orbit inflight measurement differential energy flux surface charging storm/substorm 

分 类 号：V447[航空宇航科学与技术—飞行器设计]