9th Spacecraft Enivironment Symposium (November 5-6, 2012, Setagaya Campus, Tokyo City University), Tokyo Japan
抄録（英）
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.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
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
61891024.pdf
(1.62MB)
