Open AccessAn alternative scheme of angular‐dispersion analyzers for high‐resolution medium‐energy inelastic X‐ray scattering
Author(s) -
Huang XianRong
Publication year - 2011
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049511036703
Subject(s) - monochromator , diffraction , optics , inelastic scattering , scattering , spectrum analyzer , physics , resolution (logic) , reflection (computer programming) , dispersion (optics) , beam (structure) , computational physics , computer science , wavelength , artificial intelligence , programming language
The development of medium‐energy inelastic X‐ray scattering optics with meV and sub‐meV resolution has attracted considerable efforts in recent years. Meanwhile, there are also concerns or debates about the fundamental and feasibility of the involved schemes. Here the central optical component, the back‐reflection angular‐dispersion monochromator or analyzer, is analyzed. The results show that the multiple‐beam diffraction effect together with transmission‐induced absorption can noticeably reduce the diffraction efficiency, although it may not be a fatal threat. In order to improve the efficiency, a simple four‐bounce analyzer is proposed that completely avoids these two adverse effects. The new scheme is illustrated to be a feasible alternative approach for developing meV‐ to sub‐meV‐resolution inelastic X‐ray scattering spectroscopy.