JAXA Repository / AIREX 未来へ続く、宙(そら)への英知

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Other TitleGround-based experiments of arcing on spacecraft surface insulators in ambient plasma environments
Author(jpn)田原 弘一; 増山 貴久; 永田 政人
Author(eng)Tahara, Hirokazu; Masuyama, Takahisa; Nagata, Masato
Author Affiliation(jpn)大阪大学 大学院基礎工学研究科; 大阪大学 大学院基礎工学研究科; 大阪大学 大学院基礎工学研究科
Author Affiliation(eng)Osaka University Graduate School of Engineering Science; Osaka University Graduate School of Engineering Science; Osaka University Graduate School of Engineering Science
Issue Date2004-06
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
Publication title第23回宇宙エネルギーシンポジウム 平成15年度
The 23rd ISAS Space Energy Symposium March 9, 2004
Start page41
End page45
Publication date2004-06
AbstractIn the future, LEO spacecraft will be larger and higher powered. Because of the balance of leakage currents through ambient space plasma, their main conductive body will have a higher negative potential without plasma contactor operation. When spacecraft operate with a higher voltage, more intensive arcing is suspected to occur on the surface. In this study, ground-based experiment and Direct-Simulation-Monte-Carlo Particle-In-Cell plasma simulation were carried out to understand the arcing phenomenon and to examine influences of ambient space plasma on the arcing process. Simulating plasmas were generated by electron cyclotron resonance discharge. When arcing occurred on negatively-biased anodized aluminum sample (AAS) plates in the plasma environment, the time variations in arc current and bias voltage were measured. Arc spot diameter was also measured. The experimental results showed that both the peak arc current and the total charge emitted by arcing increased with initial charging voltage and neutral particle number density. The diameter of arc spots increased with initial charging voltage although it was almost constant regardless of neutral particle density. The calculated results showed that neutral particles in addition to charged particles around spacecraft played an important role in expansion of arc plasma causing the arcing characteristics. Accordingly, high voltage operation of LEO spacecraft might bring drastic degradation of AAS by arcing, depending on ambient plasma conditions.
Keywordsspace technology experiment; ground-based experiment; spacecraft charging; aerospace environment; arcing; synchronous orbit; space plasma; electric discharge; 宇宙技術実験; 地上実験; 宇宙機帯電; 航空宇宙環境; アーキング; 同期軌道; 宇宙プラズマ; 放電
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会

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