Enhanced x-ray angular dispersion and x-ray spectrographs with resolving power beyond 10^{-8}

Yuri Shvyd'ko

doi:10.1117/12.930442

15 October 2012 Enhanced x-ray angular dispersion and x-ray spectrographs with resolving power beyond 10⁸

Yuri Shvyd'ko

Proceedings Volume 8502, Advances in X-Ray/EUV Optics and Components VII; 85020J (2012) https://doi.org/10.1117/12.930442
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

Spectrograph is an optical device that is used to disperse photons of different energies E into distinct directions and space locations, and to take a snapshot of the whole spectrum of photon energies with a spatially sensitive photon detector. Substantial advantage of a spectrograph over an ordinary spectral analyzer, is its ability to deal with many photon energies simultaneously, thus reducing exposure time per spectrum considerably. To realize a spectrograph, dispersing elements with large angular dispersion rate are required. In visible light optics this is easily achieved with diffraction gratings. In hard x-ray regime this is a problem. Here we show, on the example of CDW x-ray optics, that multi-crystal arrangements may feature cumulative angular dispersion rates more than an order of magnitude larger than those attainable in single Bragg reflections. This makes, first, hard x-ray spectrographs feasible, and, secondly, a resolving power beyond E/ΔE approximate > 10⁸

Citation Download Citation

Yuri Shvyd'ko "Enhanced x-ray angular dispersion and x-ray spectrographs with resolving power beyond 10⁸", Proc. SPIE 8502, Advances in X-Ray/EUV Optics and Components VII, 85020J (15 October 2012); https://doi.org/10.1117/12.930442

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