Upgrade and recent performance of 24‐m SGM at the Photon Factory
Upgrade and recent performance of 24‐m SGM at the Photon Factory
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Photon Factory 24-m SGM 的升级和最新性能
DOI：
10.1063/1.1143061
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发表时间：
1992
影响因子：
1.6
通讯作者：
A. Yagishita
中科院分区：
文献类型：
--
作者：
S. Masui;E. Shigemasa;A. Yagishita
描述了24-m球面光栅单色仪的性能。该光束线由预聚焦超环面镜、带可动出射狭缝的球面光栅单色器和重聚焦镜组成。使用600-l/mm光栅和50-μm狭缝开口，在45 eV处实现了5700的分辨率，与理论预测非常一致。对于600 l/mm的光栅，从Ne 2 p光电子产额估计的二阶贡献对于30-90 eV的光谱范围小于一阶的40%，对于90-160 eV的光谱范围小于11%。估计对于80-90 eV的光谱范围小于31%，对于90-150 eV的光谱范围小于11%。对于600 l/mm的光栅，在70 eV处可获得约105 ×1012光子/s的光子通量;对于1800 l/mm的光栅，在150 eV处可获得约1012光子/s的光子通量。
Performance of a 24‐m spherical grating monochromator is described. This beamline is composed of a prefocusing toroidal mirror, a spherical grating monochromator with a movable exit slit and refocusing mirrors. With a 600‐l/mm grating and 50‐μm slit openings, the resolving power of 5700 was achieved at 45 eV in good agreement with the theoretical prediction. The second‐order contribution was estimated from Ne 2p photoelectron yield to be less than 40% of the first order for the spectral range of 30–90 eV and less than 11% for that of 90–160 eV with the grating of 600 l/mm. As to the grating of 1800 l/mm, it was estimated to be less than 31% for the spectral range of 80–90 eV and less than 11% for that of 90–150 eV. A photon flux of ≂5×1012 photons/s is obtainable at 70 eV for the grating of 600 l/mm and that of ≂1012 photons/s is obtainable at 150 eV for the grating of 1800 l/mm.