Wriston R S, Froechtenigt J F
Appl Opt. 1973 Jan 1;12(1):25-8. doi: 10.1364/AO.12.000025.
D esign of grazing incidence soft x-ray telescope mirrors requires information regarding performance of optical surfaces in the wavelength region of interest. A method is described for measuring x-ray scattering in the reflected beam to sec of arc accuracy. Measurements of nine metal and three glass optical flat samples were made. The glass samples were superior at 8.34 A, but both types performed almost equally well at 44 A The scattering was found to be large in magnitude at small glancing angles of incidence. The scattering then decreased with increasing glancing angle of incidence until a critical angle was passed. At larger angles the scattering increased again. In general, all samples scattered more at 44 Athan at 8.34A. The data indicate that grazing incidence soft x-ray telescope mirrors should be designed by choosing the appropriate angle of incidence to minimize x-ray scattering in the wavelength band of interest.
掠入射软X射线望远镜镜面的设计需要有关感兴趣波长区域内光学表面性能的信息。本文描述了一种用于测量反射光束中X射线散射至弧秒精度的方法。对九个金属和三个玻璃光学平面样品进行了测量。玻璃样品在8.34埃时表现更优，但两种类型在44埃时表现几乎同样出色。发现在小掠入射角时散射量很大。然后随着掠入射角的增加散射减小，直到通过临界角。在更大角度时散射又会增加。一般来说，所有样品在44埃时的散射比在8.34埃时更多。数据表明，掠入射软X射线望远镜镜面的设计应通过选择合适的入射角，以在感兴趣的波长带中最小化X射线散射。
