Abstract The Al film reflectors can yield a high-reflectance over a broad wavelength region, and have been widely used in the spacecraft optical instruments for high quality optical applications. Under the irradiation of charged particles in the Earth radiation belt, the reflectors could be deteriorated. In order to reveal the deterioration mechanism, the change in optical constants of Al film reflector induced by proton radiation with 60 keV was studied in an environment of vacuum with heat sink. Experimental results showed that when the radiation damage primarily occurs in the Al reflecting film, the extinction coefficient k will gradually decrease with increasing radiation fluence, which results in the decrease of the energies of reflective light. Therefore, the proton radiation induced an obvious degradation of spectral reflectance in the wavelength region from 200 to 800 nm on the Al film reflector.
Received: 04 November 2005
Revised: 21 December 2005
Accepted manuscript online:
Fund: Project supported by the National Key Basic Research Special Foundation of China (G19990650).
Cite this article:
Liu Hai (刘 海), Wei Qiang (魏 强), He Shi-Yu (何世禹), Zhao Dan (赵 丹) Proton radiation effects on optical constants of Al film reflector 2006 Chinese Physics 15 1086
Effect of helium implantation on SiC and graphite Guo Hong-Yan (郭洪燕), Ge Chang-Chun (葛昌纯), Xia Min (夏敏), Guo Li-Ping (郭立平), Chen Ji-Hong (陈济鸿), Yan Qing-Zhi (燕青芝). Chin. Phys. B, 2015, 24(3): 037803.
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