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Other TitleCharging Characteristics in Polyimide Film Irradiated by Proton
Author(jpn)内山, 龍; 沼田, 誠也; 三宅, 弘晃; 田中, 康寛; 高田, 達雄
Author(eng)Uchiyama, Ryo; Numata, Seiya; Miyake, Hiroaki; Tanaka, Yasuhiro; Takada, Tatsuo
Author Affiliation(jpn)東京都市大学; 東京都市大学; 東京都市大学; 東京都市大学; 東京都市大学
Author Affiliation(eng)Tokyo City University; Tokyo City University; Tokyo City University; Tokyo City University; Tokyo City University
Issue Date2012-02-20
Japan Aerospace Exploration Agency (JAXA)
Publication title宇宙航空研究開発機構特別資料: 第8回宇宙環境シンポジウム講演論文集
JAXA special publication: Proceedings of the 8th Spacecraft Environment Symposium
Start page175
End page179
Publication date2012-02-20
AbstractSpacecraft sometimes have a serious damage due to the electro static discharge accident. It is said that the charge accumulation in dielectric materials on spacecraft irradiated by high energy charged particles in space environment causes the discharge accident. Therefore, we need to investigate the charge accumulation characteristics in the bulk of dielectric materials. We have been developing a system for measuring internal charge distribution in dielectric materials using Pulsed Electro-Acoustic (PEA) method. Using the system, we tried to measure the charge distribution after proton beam irradiated polyimide (PI) film, which has been used as a thermal control layer of spacecraft. From the result, it is found that positive charge accumulates in PI film rapidly up to a certain saturated value, then it gradually decreases during the proton beam irradiation. As the reason for the phenomenon, we consider the RIC (Radiation Induced Conductivity) by proton beam. In this paper, we show the typical charge distribution under proton beam irradiation and the conductivity in PI irradiated by proton beam. As the result, it is found that the relationship of decrease processes in amount of positive charge and RIC.
DescriptionPhysical characteristics: Original contains color illustrations
Meeting Information: 8th Spacecraft Enivironment Symposium (October 18-19, 2011, Tokyo Big Sight), Tokyo Japan
形態: カラー図版あり
会議情報: 第8回宇宙環境シンポジウム (2011年10月18-19日. 東京国際展示場), 東京
KeywordsSpacecraft; Dielectric material; Proton-beam; Charge distribution; PEA method; Conductivity; Polyimide; 宇宙機; 絶縁材料; プロトン; 電荷分布; PEA法; 導電率; ポリイミド
Document TypeConference Paper
JAXA Category特別資料
Report NoJAXA-SP-11-012

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