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鋁膜反射鏡60 keV質(zhì)子輻照效應

The effects of 60 keV proton irradiation on aluminum film reflector

  • 摘要: 文章研究了在真空和熱沉環(huán)境下，鋁膜反射鏡經(jīng)質(zhì)子輻照后的光學反射率變化,。試驗結果表明：60 keV質(zhì)子輻照后,，鋁膜反射鏡反射率發(fā)生了明顯的變化。隨輻照注量的增加,，反射率呈單調(diào)減少趨勢,。當輻照注量達到1×1016 cm-2時，反射率略有下降,，且這種變化首先發(fā)生在紫外區(qū),。隨著輻照劑量進一步增加，反射率明顯下降,，特別是在波長為250~800 nm范圍內(nèi),。經(jīng)表面形貌分析和機理分析，鋁膜反射鏡反射率的降低可歸結為經(jīng)質(zhì)子輻照后鋁鏡面表面產(chǎn)生了波紋和小丘形貌。

     

    Abstract: Under the environment of vacuum and heat sink, the effects of the irradiation of protons with an energy of 60 keV on the optical specular reflectance of Al reflector are studied. The experimental results show that the specular reflectance of the Al film reflector is significantly affected by the irradiation. With increasing fluence, the specular reflectance decreases monotonously. At a low radiation fluence of 1×1016 cm-2, the specular reflectance is decreased but slightly, and the change firstly occurs in the ultraviolet region. With a further increase of fluence, a significant decrease of the specular reflectance occurs particularly in the wavelength range of 250~800 nm. The reason for the decrease could be attributed to the appearance of ripples and hillocks on the surface of the Al mirror after the proton irradiation.

     

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