Harada Yoshihisa, Kobayashi Masaki, Niwa Hideharu, Senba Yasunori, Ohashi Haruhiko, Tokushima Takashi, Horikawa Yuka, Shin Shik, Oshima Masaharu
Department of Applied Chemistry, Graduate School of Engineering, The University of Tokyo, Bunkyo, Tokyo, Japan.
Rev Sci Instrum. 2012 Jan;83(1):013116. doi: 10.1063/1.3680559.
An extremely high resolution flat field type slit less soft x-ray emission spectrometer has been designed and constructed for the long undulator beamline BL07LSU in SPring-8. By optimizing the ruling parameters of two cylindrical gratings, a high energy resolution ΔE < 100 meV and/or an E∕ΔE ~ 10 000 are expected for the energy range of 350 eV - 750 eV taking into account the broadening by the spatial resolution (25 μm) of a CCD detector. A coma-free operation mode proposed by Strocov et al., is also applied to eliminate both defocus and coma aberrations. The spectrometer demonstrated experimentally that E/ΔE = 10 050 and 8046 for N 1s (402.1 eV) and Mn 2p (641.8 eV) edges, respectively.
为日本兵库县播磨科学城SPring-8的长波荡器光束线BL07LSU设计并制造了一台超高分辨率平场型无狭缝软X射线发射光谱仪。通过优化两个柱面光栅的刻划参数，考虑到电荷耦合器件（CCD）探测器的空间分辨率（25μm）造成的展宽，在350eV - 750eV能量范围内有望实现高能分辨率ΔE < 100meV和/或E∕ΔE ~ 10000。还采用了斯特罗科夫等人提出的无彗差操作模式，以消除离焦和彗差像差。该光谱仪通过实验证明，对于N 1s（402.1eV）和Mn 2p（641.8eV）边，E/ΔE分别为10050和8046。
