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Proceedings Paper

Enhanced x-ray angular dispersion and x-ray spectrographs with resolving power beyond 10^{-8}
Author(s): Yuri Shvyd'ko
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Paper 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

Paper Details

Date Published: 15 October 2012
PDF: 5 pages
Proc. SPIE 8502, Advances in X-Ray/EUV Optics and Components VII, 85020J (15 October 2012); doi: 10.1117/12.930442
Show Author Affiliations
Yuri Shvyd'ko, Argonne National Lab. (United States)

Published in SPIE Proceedings Vol. 8502:
Advances in X-Ray/EUV Optics and Components VII
Shunji Goto; Christian Morawe; Ali M. Khounsary, Editor(s)

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