Performance of quartz- and sapphire-based double-crystal high-resolution (∼10 meV) RIXS monochromators under varying power loads

In the context of a novel, high-resolution resonant inelastic X-ray scattering spectrometer, a flat-crystal-based quartz analyzer system has recently been demonstrated to provide an unprecedented intrinsic-energy resolution of 3.9 meV at the Ir L3 absorption edge (11.215 keV) [Kim et al. (2018) Sci....

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Veröffentlicht in:Journal of synchrotron radiation. - 1994. - 25(2018), Pt 4 vom: 01. Juli, Seite 1030-1035
1. Verfasser: Gog, Thomas (VerfasserIn)
Weitere Verfasser: Casa, Diego M, Knopp, Jonathan, Kim, Jungho, Upton, Mary H, Krakora, Richard, Jaski, Alan, Said, Ayman, Yavaş, Hasan, Gretarsson, Hlynur, Huang, Xian Rong
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2018
Zugriff auf das übergeordnete Werk:Journal of synchrotron radiation
Schlagworte:Journal Article RIXS X-ray optics high-resolution monochromators non-traditional crystal materials resonant inelastic X-ray scattering
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520 |a In the context of a novel, high-resolution resonant inelastic X-ray scattering spectrometer, a flat-crystal-based quartz analyzer system has recently been demonstrated to provide an unprecedented intrinsic-energy resolution of 3.9 meV at the Ir L3 absorption edge (11.215 keV) [Kim et al. (2018) Sci. Rep. 8, 1958]. However, the overall instrument resolution was limited to 9.7 meV because of an 8.9 meV incident band pass, generated by the available high-resolution four-bounce Si(844) monochromator. In order to better match the potent resolving power of the novel analyzer with the energy band pass of the incident beam, a quartz(309)-based double-bounce, high-resolution monochromator was designed and implemented, expected to yield an overall instrument resolution of 6.0 meV. The choice of lower-symmetry quartz is very attractive because of its wealth of suitable near-backscattering reflections. However, it was found that during room-temperature operation typical levels of incident power, barely affecting the Si monochromator, caused substantial thermal distortions in the first crystal of the quartz monochromator, rendering it practically unusable. Finite-element analyses and heat-flow analyses corroborate this finding. As a high-flux, lower resolution (15.8 meV) alternative, a two-bounce sapphire(078) version was also tested and found to be less affected than quartz, but notably more than silicon 
650 4 |a Journal Article 
650 4 |a RIXS 
650 4 |a X-ray optics 
650 4 |a high-resolution monochromators 
650 4 |a non-traditional crystal materials 
650 4 |a resonant inelastic X-ray scattering 
700 1 |a Casa, Diego M  |e verfasserin  |4 aut 
700 1 |a Knopp, Jonathan  |e verfasserin  |4 aut 
700 1 |a Kim, Jungho  |e verfasserin  |4 aut 
700 1 |a Upton, Mary H  |e verfasserin  |4 aut 
700 1 |a Krakora, Richard  |e verfasserin  |4 aut 
700 1 |a Jaski, Alan  |e verfasserin  |4 aut 
700 1 |a Said, Ayman  |e verfasserin  |4 aut 
700 1 |a Yavaş, Hasan  |e verfasserin  |4 aut 
700 1 |a Gretarsson, Hlynur  |e verfasserin  |4 aut 
700 1 |a Huang, Xian Rong  |e verfasserin  |4 aut 
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