Koike Masato, Namioka Takeshi
Advanced Photon Research Center, Kansai Research Establishment, Japan Atomic Energy Research Institute, Kizu, Kyoto.
Appl Opt. 2002 Jan 1;41(1):245-57. doi: 10.1364/ao.41.000245.
A geometric theory of a grazing-incidence varied-line-spacing plane-grating monochromator system whose scanning is made by a simple grating rotation about the grating normal has been developed for designing Monk-Gillieson monochromators capable of covering an energy range of 0.6-2.5 keV. Analytic expressions are given for the grating equations, focal conditions, dispersion, spectral image shape, and optimization of groove parameters. On the basis of the theory, two monochromator systems have been designed: system I for moderate resolution and system II for relatively high resolution. The validity of the analytic formulas and the expected performance of the designed systems have been evaluated by means of ray tracing. The results show that the analytic formulas are sufficiently accurate for practical applications and that systems I and II would provide resolving power of approximately 1450-600 and 7500-2000, respectively, in the wavelength region of 0.5-2.0 nm.
已开发出一种掠入射变线间距平面光栅单色仪系统的几何理论，该系统通过使光栅绕光栅法线进行简单旋转来扫描，用于设计能够覆盖0.6 - 2.5 keV能量范围的蒙克 - 吉利森单色仪。给出了光栅方程、聚焦条件、色散、光谱图像形状以及槽参数优化的解析表达式。基于该理论，设计了两个单色仪系统：用于中等分辨率的系统I和用于相对高分辨率的系统II。通过光线追迹评估了解析公式的有效性和所设计系统的预期性能。结果表明，解析公式在实际应用中足够准确，并且系统I和系统II在0.5 - 2.0 nm波长区域分别将提供约1450 - 600和7500 - 2000的分辨能力。
