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title宇宙機表面材料の静電気放電に起因したワイヤ間の持続放電現象
Other TitleSustained Arcing Discharges between Wires Triggered by Surface Flashover on Thermal Control Material Due to Electron Irradiation
Author(jpn)岩井, 俊輔; 藤井, 治久
Author(eng)Iwai, Shunsuke; Fujii, Haruhisa
Author Affiliation(jpn)国立高等専門学校機構; 奈良工業高等専門学校電気工学科
Author Affiliation(eng)Institute of National Colleges of Technology; Department of Electrical Engineering, Nara National College of Technology
Issue Date2010-02
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)
宇宙航空研究開発機構宇宙科学研究本部
Publication titleSpace Energy Symposium
宇宙エネルギーシンポジウム
Volume29
Publication date2010-02
Languagejpn
eng
AbstractWith the advance of development of space utilization, the size and the electric power capacity of a spacecraft have become larger. It is necessary to generate and transmit the elecricity with higher voltage for the higher electric power capacity. Power wires transmitting the electricity are occasionally distributed outside the body and/or the solar array paddles of the spacecraft. The wires are possible to be damaged by impacts of space debris and/or heat cycles. Then the conductors of the wires are exposed to space.In these situations, when spacecraft charging due to space plasma induces flashover on the surface materials of the spacecraft, discharge plasma formed near the exposed conductors of the wires is possible to cause sustained arcing discharge between the conductors. The occurrence of these discharges causes malfunctions or damages to the spacecraft.From these viewpoints, we carried out experiments for the sustained arcing discharges between wires triggered by surface flashover on a thermal control material, silvered Teflon FEP, due to electron beam irradiation. A pair of wires with partially lacked ETFE insulator laid on the FEP film with 125microm thickness was irradiated by electron beam with the energy smaller than 20keV in a vacuum chamber. As a resistor R was inserted between two wires, potential difference R・I was formed between the two wires by flowing current I from a current source. Surface flashover occurred when the surface potential of the FEP film became over -15kV. At the time of the flashover, arcing discharge occurred between the conductors of the wires. For example, the arcing sustained for about 80micros in the case of the potential difference RI=100V. We obtained the result that the arcing time is dependent on the potential difference RI and the charge quantity released by flashover.
DescriptionOriginal contains color illustrations
Meeting Information: The twenty-ninth Space Energy Symposium (February 26, 2010, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara)
形態: カラー図版あり
会議情報: 第29回宇宙エネルギーシンポジウム(2010年2月26日, 宇宙航空研究開発機構宇宙科学研究本部相模原キャンパス)
形態: CD-ROM1枚
Note: One CD-ROM
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会
NCIDAN10324356
SHI-NOAA0064737010
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/18287


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