极紫外、软X-射线变线距平面光栅单色仪的研究

高性能极紫外、软X射线单色仪的研制对高亮度同步辐射光源的应用具有十分重要的意义。对Itou的变线距平面光栅单色仪作了详细的分析研究，发现它的光栅工作曲线几乎与单色仪的入、出射臂长度等参量无关，仅取决于单色仪设计的边界条件。其曲线方程和SX-700单色仪的完全类似。该单色仪不仅具有很好的光栅效率和高级次谐波抑制性能，而且有利于几条光束线共享一个电子储存环窗口的光路优化设计。

Study of Ultraviolet and Soft X-Ray Varied Line-Space Plane Grating Monochromator

Thedevelopment of ultraviolet and soft X-ray monochromators with high performances is very important to the applications of high-brightness synchrotron radiation light source. The varied line-space plane grating monochromator by Itou is studed in detail, and it is found that its grating working curve is nearly independent of the monochromator parameters, such as entrance-arm and exit-arm lengths, and only determined by its boundary condition. The curve equation is similar to that of the SX-700's. The monochromator has both very good grating-diffraction-efficiency and high-order-suppression performances. Moreover, it is very convenient to optimize the monochromator performances and solve the problem of space conflict caused by more than one beamlines that share the same storage-ring window.