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Rev Sci Instrum. 2017 Mar;88(3):033106. doi: 10.1063/1.4977592.

High-efficiency in situ resonant inelastic x-ray scattering (iRIXS) endstation at the Advanced Light Source.

Author information

1
Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA.
2
Universität Würzburg, Experimentelle Physik 7, 97074 Würzburg, Germany.
3
Department of Chemistry and Biochemistry, University of Nevada, Las Vegas (UNLV), Las Vegas, Nevada 89154-4003, USA.
4
Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
5
School of Physics, National Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China.
6
School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China.
7
Department of Materials Science and Engineering, Binghamton University, Binghamton, New York 13902, USA.

Abstract

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.

PMID:
28372380
DOI:
10.1063/1.4977592
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