一种为高性能真空紫外光束线设计的新型额外聚焦单色仪。

A new extra-focus monochromator designed for high-performance VUV beamlines.

作者信息

Xue Chaofan, Wu Yanqing, Zou Ying, Xue Lian, Wang Yong, Xu Zijian, Tai Renzhong

机构信息

Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai Synchrotron Radiation Facility, Shanghai 201800, People's Republic of China.

出版信息

J Synchrotron Radiat. 2015 Mar;22(2):328-35. doi: 10.1107/S1600577514025260. Epub 2015 Jan 28.

DOI:10.1107/S1600577514025260

PMID:25723933

Abstract

A new monochromator called an extra-focus constant-included-angle varied-line-spacing (VLS) cylindrical-grating monochromator (extra-focus CIA-VCGM) is described. This monochromator is based on the Hettrick-Underwood scheme where the plane VLS grating is replaced by a cylindrical one in order to zero the defocus at three reference photon energies in the vacuum-ultraviolet range. It has a simple mechanical structure and a fixed focus spot with high performance over a wide energy range. Furthermore, its mechanical compatibility with a standard VLS plane-grating monochromator allows convenient extension into the soft-X-ray range.

摘要

介绍了一种新型单色仪，称为焦外恒定夹角变线间距（VLS）圆柱光栅单色仪（焦外CIA-VCGM）。该单色仪基于Hettrick-Underwood方案，其中平面VLS光栅被圆柱光栅取代，以便在真空紫外范围内的三个参考光子能量处使散焦为零。它具有简单的机械结构和固定的焦点，在宽能量范围内具有高性能。此外，它与标准VLS平面光栅单色仪的机械兼容性允许方便地扩展到软X射线范围。