A. N. Shatokhin, E. A. Vishnyakov, A. O. Kolesnikov, A. D. Nikolenko, E. N. Ragozin
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引用次数: 0
摘要
摘要 为投射同步辐射源 "SKIF"（新西伯利亚）的测量光束线设计了一个具有 125-4200 Å 宽光谱范围的高分辨率单色仪。单色仪的光学结构包括一个掠入射凹面镜、一个平面 VLS 光栅和一个出口狭缝。计划使用两个可更换的 VLS 光栅，其中心槽频率分别为 600 和 150 mm-1，用于 125-1000 Å 和 900-4200 Å 子范围。只需旋转 VLS 光栅，即可在两个子范围内分别进行波长调整。由于正确选择了 p1 VLS 光栅系数，焦距在整个光谱范围内变化很小，而 p2 VLS 光栅系数则用于抑制反射镜和光栅的像差。通过数值光线跟踪获得的配置的分辨能力在 125-1000 Å 范围内超过 1000，在 900-4200 Å 范围内超过 2000。
Design of a High-Resolution VLS Monochromator for Synchrotron Radiation
Abstract
A high-resolution monochromator with a broad spectral range of 125–4200 Å is designed for a measuring beamline of the projected synchrotron radiation source “SKIF” (Novosibirsk). The optical configuration of the monochromator comprises a grazing-incidence concave mirror, a plane VLS grating, and an exit slit. It is planned to use two replaceable VLS gratings with central groove frequencies of 600 and 150 mm–1 intended for subranges of 125–1000 Å and 900–4200 Å, respectively. Wavelength tuning in each of the two subranges is carried out by solely the rotation of the VLS-gratings. Due to the proper choice of p1 VLS-grating coefficients, the focal distance varies only slightly over the entire spectral range, and the p2 VLS-grating coefficients are used to suppress the aberrations of the mirror and the gratings. The resolving power of the configuration obtained by numerical ray tracing exceeds 1000 in the 125–1000 Å range and 2000 in the 900–4200 Å range.
期刊介绍：
Technical Physics is a journal that contains practical information on all aspects of applied physics, especially instrumentation and measurement techniques. Particular emphasis is put on plasma physics and related fields such as studies of charged particles in electromagnetic fields, synchrotron radiation, electron and ion beams, gas lasers and discharges. Other journal topics are the properties of condensed matter, including semiconductors, superconductors, gases, liquids, and different materials.
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