加拿大光源可变线间距平面光栅单色仪光束线的调试与性能

Commissioning and performance of the variable line spacing plane grating monochromator beamline at the Canadian Light Source.

作者信息

Hu Y F, Zuin L, Wright G, Igarashi R, McKibben M, Wilson T, Chen S Y, Johnson T, Maxwell D, Yates B W, Sham T K, Reininger R

机构信息

Canadian Light Source, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.

出版信息

Rev Sci Instrum. 2007 Aug;78(8):083109. doi: 10.1063/1.2778613.

DOI:10.1063/1.2778613

PMID:17764315

Abstract

The variable line spacing plane grating monochromator beamline at the Canadian Light Source (CLS) employs three grazing incidence variable line spacing gratings to cover a photon energy range of 5-250 eV. It uses a 185 mm period length planar permanent magnet insertion device as the photon source, sharing a straight section with another soft x-ray beamline at the CLS. The commissioning and performance of the beamline is reported. The high resolution photoabsorption spectra of Ar and PF(5) gases are reported. A resolving power of over 40,000 for photons in the low energy region and >10,000 for a wider energy range (8-200 eV) can be achieved. A photon flux of up to 2 x 10(12) photons/s per 100 mA with slit settings of 50 microm has been measured.

摘要

加拿大光源（CLS）的可变行距平面光栅单色仪光束线采用三块掠入射可变行距光栅，以覆盖5 - 250电子伏特的光子能量范围。它使用周期长度为185毫米的平面永久磁铁插入式装置作为光子源，与CLS的另一条软X射线光束线共用一个直线节段。报告了该光束线的调试情况和性能。报告了氩气和五氟化磷气体的高分辨率光吸收光谱。在低能量区域，光子的分辨率可达40000以上，在更宽的能量范围（8 - 200电子伏特）分辨率大于10000。在狭缝设置为50微米、每100毫安的情况下，已测得高达2×10¹²光子/秒的光子通量。