Japan Aerospace Exploration Agency(JAXA)
Japan Aerospace Exploration Agency(JAXA)
Mitsubishi Electric Corporation
Mitsubishi Electric Corporation
Mitsubishi Electric Corporation
出版者
日本航空宇宙学会(JSASS)
出版者（英）
The Japan Society for Aeronautical and Space Sciences (JSASS)
雑誌名
第58回宇宙科学技術連合講演会講演集
雑誌名(英)
Proceedings of 58th Space Sciences and Technology Conference
The super-low earth orbits under the altitude of 250 km are very attractive for earth and atmospheric observation. JAXA plans to launch the first test satellite in super-low altitude called SLATS. Such satellites use ion thrusters to compensate for air drag and keep their altitude. However, there are a lot of atomic oxygen in super-low earth orbit. The dispenser cathodes generally show degradation by oxidation. Therefore, the effect of atomic oxygen for the hollow-cathode was evaluated here. First, the electron emission test and physical analyses were conducted using pellet samples of cathode parts. Secondly, the discharge test was conducted using a dummy cathode whose parts can be replaced. The results show that no degradation occurs with appropriate operations in orbit.
中型イオンエンジン用陰極の原子状酸素耐性評価
AC1500021000.pdf
(998.78KB)
