用空间辐照环境模拟设备对甲基硅橡胶进行了质子辐照试验。辐照能量为200keV，辐照剂量范围为1014-1016cm-2。利用热发光和热激电流分析方法，研究了硅橡胶质子辐照前后载流子陷阱能级ΔE及载流子类型的变化规律。研究结果表明：当辐照剂量小于1015cm-2时，ΔE下降，当辐照剂量超过1015cm-2后，ΔE上升。硅橡胶原始样品中主要载流子类型是电子型的。当质子辐照剂量超过5×1014cm-2后，主要载流子类型转变为空穴型。辐照剂量继续增加，载流子类型又有向电子型转变的趋势。
Protons radiation tests were carried out on methyl silicone rubber using space environment simulator system. The proton energy was chosen as 200keV, and the fluence in the range of 1014~1016cm-2. By means of thermoluminescence (TL) and thermally stimulated current (TSC) analyses, the evolution of the trap energy levelsΔE, the charge carrier type in the rubbers before and after proton radiation were characterized. TL and TSC analyses demonstrated that under the proton radiation, under the proton fluence less than 1015cm-2,ΔE decreased; under the fluence more than 1015cm-2, the situation was the opposite. After the proton radiation, the charge carriers in the silicone rubbers changed from the electron-type to the vacancy-type, and tended to the electron-type again after the fluence was further increased.
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