MERIX-Next generation medium energy resolution inelastic X-ray scattering instrument at the APS

作者：Shvyd'ko Yu V^*; Hill J P; Burns C A; Coburn D S; Brajuskovic B; Casa D; Goetze K; Gog T; Khachatryan R; Kim J H; Kodituwakku C N; Ramanathan M; Roberts T; Said A; Sinn H; Shu D; Stoupin S; Upton M; Wieczorek M; Yavas H

来源：Journal of Electron Spectroscopy and Related Phenomena, 2013, 188: 140-149.

DOI：10.1016/j.elspec.2012.09.003

• Electronic excitations
• X-rays
• Resonant Inelastic X-rayScattering (RIXS)
• Spectrometer
• Monochromator
• Analyzer

MERIX (Medium Energy Resolution Inelastic X-ray Scattering) is an instrument for Resonant Inelastic X-ray Scattering (RIXS) studies, in the hard X-ray regime, designed to work with photons in the 5-12 key range, spanning atomic resonances near the K-edges of 3d elements, and the L-edges of 4f and 5d elements. The energy analysis of inelastically scattered photons is performed with segmented spherical crystal analyzers in close to Bragg backscattering geometry. For each resonance (edge) a specially designed analyzer is used, fabricated from Ge, Si, or LiNbO3 crystals. MERIX uses a position sensitive (micro-strip) detector to take snapshots of IXS spectra which are dispersed in space and over an energy range of a few eV with similar or equal to 20-40 meV energy resolution. The spectral resolution of the MERIX spectrometer depends on the analyzer and varies from similar or equal to 45 meV to similar or equal to 170 meV, while the momentum transfer resolution is similar or equal to 1-4 nm(-1). Samples are illuminated by micro-focused beams of size similar or equal to 10 mu m x 45 mu m, allowing for studies at high-pressure and other extreme conditions. Polarization selectivity is ensured by vertical or horizontal momentum transfer scans. MERIX features similar or equal to 100 times higher count-rates compared to previously built RIXS instruments. Published by Elsevier B.V.

• 出版日期2013-6