Current status of the undulator beamline BL-2C at Photon Factory
Current status of the undulator beamline BL-2C at Photon Factory
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Photon Factory 波荡器光束线 BL-2C 的现状
DOI：
10.1016/s0168-9002(01)00397-7
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发表时间：
2001
影响因子：
1.4
通讯作者：
A. Yagishita
中科院分区：
文献类型：
--
作者：
M. Watanabe;A. Toyoshima;J. Adachi;A. Yagishita
研制了用于软X射线能谱测量的波动光束线BL-2C。它配备了变线距平面光栅单色仪。高能量分辨率、高光子通量和微小的光斑尺寸为气态样品、固体样品和表面的电子结构研究做出了贡献。为了进行进一步的精密测量，我们在以下三个方面对光束线进行了改进。首先，为了获得更高的能量分辨率，光学元件再次重新对准。为了证明能量分辨率，我们测量了氧1Sσ→π*激发的吸收光谱，并估计E/ΔE大于10,000。其次，对镜架进行了改造，以减少热负荷的影响。光学元件支架的改造和更换导致能量漂移变得可以忽略不计。再次，采用臭氧清洗法对被碳污染的光学元件进行清洗。经过清洗后，碳吸收边的光子通量得以恢复。
The undulator beamline BL-2C was constructed for measurements of soft X-ray spectroscopy. It is equipped with a varied line-space plane grating monochromator. High energy-resolution, high photon-flux and tiny spot-size have contributed to research on electronic structure of gaseous samples, solid samples and surfaces. In order to carry out further sophisticated measurement, we have improved the beamline at the following three points. First, optical elements were re-aligned again with great care for higher energy-resolution. To demonstrate the energy-resolution, we measured absorption spectrum of oxygen 1sσ→π* excitation and evaluated E/ΔE to be more than 10,000. Secondly, mirror holders were altered to reduce the effect of heat load. The remodeling and the replacement of the optical-element holders resulted in energy-drift becoming negligible. Thirdly, the carbon-contaminated optical elements were cleaned by ozone-cleaning method. The photon flux at the carbon absorption-edge is recovered by the cleaning.