Montel mirror based collimating analyzer system for high-pressure resonant inelastic X-ray scattering experiments

Kim, J. -K.; Casa, Diego; Huang, Xianrong; Gog, Thomas; Kim, B. J.; Kim, Jungho

doi:10.1107/s1600577520005792

Title: Montel mirror based collimating analyzer system for high-pressure resonant inelastic X-ray scattering experiments

Journal Article · Wed May 27 00:00:00 EDT 2020 · Journal of Synchrotron Radiation (Online)

DOI:https://doi.org/10.1107/s1600577520005792· OSTI ID:1660742

^[1]; Casa, Diego ^[2]; Huang, Xianrong ^[2]; Gog, Thomas ^[2]; Kim, B. J. ^[3];

^[2]

Inst. for Basic Science (IBS), Pohang (Korea); Pohang Univ. of Science and Technology (Korea); Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Inst. for Basic Science (IBS), Pohang (Korea); Pohang Univ. of Science and Technology (Korea)

Resonant inelastic X-ray scattering (RIXS) is increasingly playing a significant role in studying highly correlated systems, especially since it was proven capable of measuring low-energy magnetic excitations. However, despite high expectations for experimental evidence of novel magnetic phases at high pressure, unequivocal low-energy spectral signatures remain obscured by extrinsic scattering from material surrounding the sample in a diamond anvil cell (DAC): pressure media, Be gasket and the diamond anvils themselves. A scattered X-ray collimation based medium-energy resolution (~100 meV) analyzer system for a RIXS spectrometer at the Ir L₃-absorption edge has been designed and built to remediate these difficulties. Due to the confocal nature of the analyzer system, the majority of extrinsic scattering is rejected, yielding a clean low-energy excitation spectrum of an iridate Sr₂IrO₄ sample in a DAC cell. Finally, the energy resolution of different configurations of the collimating and analyzing optics are discussed.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Research Foundation of Korea (NRF)

Grant/Contract Number:: AC02-06CH11357; 2018H1A2A1059958; IBS-R014-A2

OSTI ID:: 1660742

Journal Information:: Journal of Synchrotron Radiation (Online), Vol. 27, Issue 4; ISSN 1600-5775

Publisher:: International Union of CrystallographyCopyright Statement

Country of Publication:: United States

Language:: English

References (21)

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
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high pressure
post-sample collimation
resonant inelastic x-ray scattering

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