EGU25-20719, updated on 15 Mar 2025
https://doi.org/10.5194/egusphere-egu25-20719
EGU General Assembly 2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Development of the All-Sky Electrostatic Analyzer for a Lunar Rover
Tzu-Fang Chang1, Chih-Yu Chiang1, Sheng-Cheng Tsai1, Yu-Rong Cheng2, Tzu-En Yen1, Zhao-Yu Huang1, Chien-Hui Chan1, Cheng-Tien Chen1, Po-Jui Li1, Ping-Ju Liu1, Yung-Tsung Cheng2, Pei-Ying Kuo2, Tsung-Pin Hung3, Yu-Ting Lyu4, Cheng-Lin Tsai5, Shiuan-Hal Shiu5, Jih-Run Tsai6, and Shin-Fa Lin6
Tzu-Fang Chang et al.
  • 1Institute of Space and Plasma Sciences, National Cheng Kung University, Tainan, Taiwan
  • 2Department of Electrical Engineering, National Cheng Kung University, Tainan, Taiwan
  • 3Department of Mold and Die Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan
  • 4Metal Industries Research & Development Centre (MIRDC), Kaohsiung, Taiwan
  • 5Liscotech System Co., Ltd, Taipei, Taiwan
  • 6Taiwan Space Agency, Hsinchu, Taiwan

All-Sky Electrostatic Analyzer (A-ESA) is a scientific payload that will be mounted on a lunar rover and is designed to observe the variations of plasma environment on the Moon. A-ESA is composed of an electrostatic analyzer on the top, and an MCP assembly, power supply units and electronics are located under it. A-ESA has the entrance scanning deflectors and the inner scanning deflectors. The entrance of A-ESA is electrically scanned within ~90∘in vertical direction, i.e. A-ESA has hemi-spherical field of view (FOV). When A-ESA is operating in observation mode, the collection of science data is divided into 8 parts in horizontal direction and 6 parts in vertical direction. And it generates 16 energy levels via sweeping high voltage. Therefore it can measure the plasma distribution function and charged particle energy in hemi-sphere space on the lunar surface. Since the launch of the science payload project, PDR, CDR, TRR and PAR reviews have been completed. Now we are carrying out function tests and performance tests. Initial function tests between A-ESA and the lunar rover have been performed too. At the end of 2024, the A-ESA has been delivered to Taiwan Space Agency (TASA).

How to cite: Chang, T.-F., Chiang, C.-Y., Tsai, S.-C., Cheng, Y.-R., Yen, T.-E., Huang, Z.-Y., Chan, C.-H., Chen, C.-T., Li, P.-J., Liu, P.-J., Cheng, Y.-T., Kuo, P.-Y., Hung, T.-P., Lyu, Y.-T., Tsai, C.-L., Shiu, S.-H., Tsai, J.-R., and Lin, S.-F.: Development of the All-Sky Electrostatic Analyzer for a Lunar Rover, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-20719, https://doi.org/10.5194/egusphere-egu25-20719, 2025.