中国物理B ›› 2006, Vol. 15 ›› Issue (5): 1086-1089.doi: 10.1088/1009-1963/15/5/037

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Proton radiation effects on optical constants of Al film reflector

刘　海, 魏　强, 何世禹, 赵　丹   

  1. Space Materials and Environment Engineering Laboratory, Harbin Institute of Technology, Harbin 150001, China
  • 收稿日期:2005-11-04 修回日期:2005-12-21 出版日期:2006-05-20 发布日期:2006-05-20
  • 基金资助:
    Project supported by the National Key Basic Research Special Foundation of China (G19990650).

Proton radiation effects on optical constants of Al film reflector

Liu Hai (刘　海), Wei Qiang (魏　强), He Shi-Yu (何世禹), Zhao Dan (赵　丹)   

  1. Space Materials and Environment Engineering Laboratory, Harbin Institute of Technology, Harbin 150001, China
  • Received:2005-11-04 Revised:2005-12-21 Online:2006-05-20 Published:2006-05-20
  • Supported by:
    Project supported by the National Key Basic Research Special Foundation of China (G19990650).

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摘要： 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.

关键词: Al film reflector, optical constants, radiation damage

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.

Key words: Al film reflector, optical constants, radiation damage

中图分类号:  (Ion radiation effects)

  • 61.80.Jh
61.82.Bg (Metals and alloys) 78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)) 78.40.Kc (Metals, semimetals, and alloys)