Qiao Ruimin, Li Qinghao, Zhuo Zengqing, Sallis Shawn, Fuchs Oliver, Blum Monika, Weinhardt Lothar, Heske Clemens, Pepper John, Jones Michael, Brown Adam, Spucces Adrian, Chow Ken, Smith Brian, Glans Per-Anders, Chen Yanxue, Yan Shishen, Pan Feng, Piper Louis F J, Denlinger Jonathan, Guo Jinghua, Hussain Zahid, Chuang Yi-De, Yang Wanli
Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA.
Universität Würzburg, Experimentelle Physik 7, 97074 Würzburg, Germany.
Rev Sci Instrum. 2017 Mar;88(3):033106. doi: 10.1063/1.4977592.
An endstation with two high-efficiency soft x-ray spectrographs was developed at Beamline 8.0.1 of the Advanced Light Source, Lawrence Berkeley National Laboratory. The endstation is capable of performing soft x-ray absorption spectroscopy, emission spectroscopy, and, in particular, resonant inelastic soft x-ray scattering (RIXS). Two slit-less variable line-spacing grating spectrographs are installed at different detection geometries. The endstation covers the photon energy range from 80 to 1500 eV. For studying transition-metal oxides, the large detection energy window allows a simultaneous collection of x-ray emission spectra with energies ranging from the O K-edge to the Ni L-edge without moving any mechanical components. The record-high efficiency enables the recording of comprehensive two-dimensional RIXS maps with good statistics within a short acquisition time. By virtue of the large energy window and high throughput of the spectrographs, partial fluorescence yield and inverse partial fluorescence yield signals could be obtained for all transition metal L-edges including Mn. Moreover, the different geometries of these two spectrographs (parallel and perpendicular to the horizontal polarization of the beamline) provide contrasts in RIXS features with two different momentum transfers.
在劳伦斯伯克利国家实验室的先进光源8.0.1光束线上开发了一个配备两台高效软X射线光谱仪的终端站。该终端站能够进行软X射线吸收光谱、发射光谱，特别是共振非弹性软X射线散射（RIXS）。两台无狭缝可变线间距光栅光谱仪安装在不同的检测几何位置。该终端站覆盖80至1500 eV的光子能量范围。对于研究过渡金属氧化物，大的检测能量窗口允许在不移动任何机械部件的情况下同时收集从O K边到Ni L边能量范围的X射线发射光谱。创纪录的高效率使得能够在短采集时间内以良好的统计数据记录全面的二维RIXS图谱。凭借光谱仪的大能量窗口和高吞吐量，可以获得包括Mn在内的所有过渡金属L边的部分荧光产率和反向部分荧光产率信号。此外，这两台光谱仪的不同几何位置（平行和垂直于光束线的水平偏振）在具有两种不同动量转移的RIXS特征中提供了对比度。
