Ultrahigh resolution soft x-ray emission spectrometer at BL07LSU in SPring-8

作者：Harada Yoshihisa^*; Kobayashi Masaki; Niwa Hideharu; Senba Yasunori; Ohashi Haruhiko; Tokushima Takashi; Horikawa Yuka; Shin Shik; Oshima Masaharu

来源：Review of Scientific Instruments, 2012, 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 Delta E < 100 meV and/or an E/Delta E similar to 10 000 are expected for the energy range of 350 eV - 750 eV taking into account the broadening by the spatial resolution (25 mu m) 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/Delta E = 10 050 and 8046 for N 1s (402.1 eV) and Mn 2p (641.8 eV) edges, respectively.

• 出版日期2012-1