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4 results on '"スペースプラズマ"'

1. Plasma and solar array arcing caused by space debris impact

Author

Cho, Mengu, Fukushige, Shinya, Akahoshi, Yasuhiro, Watanabe, Keiko, Nagasaki, Toshikazu, Sugawara, Kensho, and Kora, Takao

Subjects
spacecraft charging, large space structure, 宇宙機帯電, 短絡, ジュール加熱, プラズマ相互作用, hypervelocity impact, 宇宙デブリ, Astrophysics::Solar and Stellar Astrophysics, 太陽電池アレイ, Astrophysics::Galaxy Astrophysics, アーク放電, 超高速衝突, space debris, Joule heating, 高密度プラズマ, short circuit, aerospace environment, 大型宇宙構造物, space plasma, 航空宇宙環境, arc discharge, Physics::Space Physics, スペースプラズマ, solar array, Astrophysics::Earth and Planetary Astrophysics, plasma interaction, high density plasma
Abstract

There is high possibility that space debris impacts to a solar array paddle in spacecraft parts, because the solar array paddle has large area. Space debris impact to the solar array causes not only mechanical damage but also electrical damage such as arcing on the solar array through local high density plasma created by hypervelocity impact. In the worst case, Joule heating of this arcing carbonizes insulation layer and permanent short-circuit path is created. This is permanent sustained arc. However, no permanent sustained arc caused by space debris impact in orbit has been reported. Purpose of this study is evaluation of possibility of permanent sustained arc through the plasma created by debris impact. Hypervelocity impact tests to solar array coupons in the condition of pseudo power generation were conducted. We ascertained that space debris impact can lead to permanent sustained arc on the solar array due to plasma created by hypervelocity impact., 資料番号: AA0063997018, レポート番号: JAXA-SP-07-030

Published
2008

2. Asymmetric distribution of photoelectrons emitted from GEOTAIL satellite and its origin

Author

Shimoda, Tadahiro, Machida, Shinobu, Mukai, Toshifumi, Saito, Yoshifumi, Kasaba, Yasumasa, and Hayakawa, Hajime

Subjects
spacecraft charging, ultraviolet radiation, 地球磁気圏, solar radiation, 宇宙機帯電, 紫外放射, 非対称性, GEOTAIL satellite, aerospace environment, 速度分布, velocity distribution, space plasma, 航空宇宙環境, 光電子, GEOTAIL衛星, スペースプラズマ, 太陽放射, asymmetry, Earth magnetosphere, photoelectron
Abstract

資料番号: AA0063997028, レポート番号: JAXA-SP-07-030

Published
2008

3. Experimental measurement of secondary arc plasma parameter on solar array

Author

Cho, Mengu, Ose, Takayuki, Masui, Hirokazu, and Toyoda, Kazuhiro

Subjects
electric discharge, spacecraft charging, 宇宙機帯電, 磁気嵐, 高エネルギー電子, geostationary Earth orbit, プラズマ相互作用, 静止衛星, 放電, 太陽電池アレイ, high energy electron, アーク放電, 発光スペクトル, aerospace environment, electric field, space plasma, 航空宇宙環境, arc discharge, emission spectrum, 電場, geostationary satellite, Physics::Space Physics, スペースプラズマ, solar array, 静止軌道, plasma interaction, magnetic storm
Abstract

As the power level of geostationary satellites increases, discharge phenomena on solar array are becoming serious threat to safe operation. Arcs on solar array can short-circuit the satellite circuit, decrease the satellite power, and then cause the satellite permanent failure. To prevent the failure caused by charging and arcing, it is necessary to investigate the mechanism of satellite charging and arcing phenomenon. The purpose of this paper is to investigate the occurrence condition of a secondary arc by measuring arc plasma characteristics in ground test. We measured the arc plasma temperature and identified the materials emitted using spectrometer at arbitrary time during arc occurring. We investigated the difference of secondary arcs occurrence condition during secondary arcs. From the spectroscopic measurement results, we found that it was necessary for shifting to the secondary arc that the metallic vapor same as the cathode material was emitted. In case of PA (Permanent Arc) dimension changes, the probability of secondary arc and TSA (Temporary Sustained Arc) occurrence became high. And plasma temperature was not affected by PA dimension. However, the metallic vapor emission of silver was greatly affected. Thus, secondary arc occurrence greatly depends on metallic vapor emission from cathode., 資料番号: AA0063997017, レポート番号: JAXA-SP-07-030

Published
2008

4. Proceedings of the 4th Spacecraft Environment Symposium

Author

Space Environment Measurement Group, Institute of Aerospace Technology, Japan Aerospace Exploration Agency

Subjects
spacecraft charging, space radiation, electric discharge, 宇宙機設計, 宇宙機帯電, 高エネルギー電子, 太陽活動, Japanese space program, spacecraft power supply, 宇宙放射, electron radiation, 放電, 太陽電池アレイ, 宇宙機構造材料, spacecraft design, high energy electron, 宇宙機給電, 電子照射, 衛星軌道, aerospace environment, satellite orbit, space plasma, 航空宇宙環境, satellite surface, スペースプラズマ, solar array, 衛星表面, solar activity, 日本の宇宙計画, spacecraft construction material
Abstract

宇宙環境シンポジウム 宇宙航空研究開発機構 20080122-20080123 東京 日本, Spacecraft Environment Symposium Japan Aerospace Exploration Agency 20080122-20080123 Tokyo Japan, 資料番号: AA0063997000, レポート番号: JAXA-SP-07-030

Published
2008

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