@inproceedings{oai:jaxa.repo.nii.ac.jp:00004171, author = {内山, 龍 and 堀口, 皓平 and 王, 振 and 三宅, 弘晃 and 田中, 康寛 and Uchiyama, Ryo and Horiguchi, Kohei and Ou, Shin and Miyake, Hiroaki and Tanaka, Yasuhiro}, book = {宇宙航空研究開発機構特別資料: 第9回宇宙環境シンポジウム講演論文集, JAXA Special Publication: Proceedings of the 9th Spacecraft Environment Symposium}, month = {Feb}, note = {第9回宇宙環境シンポジウム (2012年11月5日-6日. 東京都市大学・世田谷キャンパス), 東京, 9th Spacecraft Enivironment Symposium (November 5-6, 2012, Setagaya Campus, Tokyo City University), Tokyo Japan, The spacecraft like a communication or a broadcasting satellite flying in GEO (Geostationary Orbit) is always exposed to plasma and/or radioactive-rays such as α-, β-, and γ-rays. When the insulating materials, in which the spacecraft is wrapped to keep temperature in it stable, are irradiated by the high energy proton beam, sometimes an unexpected accident due to an electrostatic discharge occurs. However, it has not known how the irradiation affects to change of the electrical properties of the materials. In our previous research work, we especially focused on an internal charging phenomenon which must affect to the electrical properties of irradiated polyimide for spacecraft. Judging from the measurement results, it is found that a positive charge accumulates in polyimide rapidly up to a certain saturated value, then it gradually decreases even during the proton beam irradiation. As the reason for the phenomenon, we consider the generation of RIC (Radiation Induced Conductivity). In this paper, we tried to measure the space charge distribution and conduction current under DC stress of 100 kV/mm in proton beam irradiated different type of Polyimides to figure out the mechanism of RIC., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA0061891024, レポート番号: JAXA-SP-12-017}, pages = {151--156}, publisher = {宇宙航空研究開発機構(JAXA), Japan Aerospace Exploration Agency (JAXA)}, title = {プロトン照射したポリイミドフィルムの絶縁劣化特性の評価}, volume = {JAXA-SP-12-017}, year = {2013} }