@inproceedings{oai:jaxa.repo.nii.ac.jp:00004442,
 author = {内山, 龍 and 沼田, 誠也 and 三宅, 弘晃 and 田中, 康寛 and 高田, 達雄 and Uchiyama, Ryo and Numata, Seiya and Miyake, Hiroaki and Tanaka, Yasuhiro and Takada, Tatsuo},
 book = {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},
 month = {Feb},
 note = {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, 8th Spacecraft Enivironment Symposium (October 18-19, 2011, Tokyo Big Sight), Tokyo Japan, Spacecraft 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., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA0065159023, レポート番号: JAXA-SP-11-012},
 pages = {175--179},
 publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)},
 title = {プロトン照射されたポリイミドフィルムにおける帯電現象},
 volume = {JAXA-SP-11-012},
 year = {2012}
}