Development of Lunar Surface Charging Environment Simulation Chamber

Research on the lunar environment and payloads is actively progressing with an increasing interest in lunar exploration. When the moon orbits the earth, the electrical properties of the lunar surface change variously by sunlight and plasma. Therefore, for the payload to operate stably on the lunar surface, we should understand these electrical properties and develop a technology that can respond to these environments. In this study, a vacuum chamber is developed, which can simulate the electrical properties of the lunar day/night, and a terminator section is developed using a vacuum ultraviolet lamp and an electron beam. Further, the simulated environment is evaluated using Faraday cups and photodiodes. We intend to lay the foundation for the evaluation of the electrical impact on various devices and technologies that can be used on the lunar surface using the vacuum chamber that is capable of simulating the electrical environment on the lunar surface.