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Wide band focusing x-ray spectrograph with spatial resolution

Rev. Sci. Instrum. 79, 013106 (2008); doi:10.1063/1.2834834

Published 18 January 2008

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S. A. Pikuz, J. D. Douglass, T. A. Shelkovenko, D. B. Sinars, and D. A. Hammer
Cornell University, Ithaca, NY 14853, USA
A new, wide spectral bandwidth x-ray spectrograph, the wide-bandwidth focusing spectrograph with spatial resolution (WB-FSSR), based on spherically bent mica crystals, is described. The wide bandwidth is achieved by combining three crystals to form a large aperture dispersive element. Since the WB-FSSR covers a wide spectral band, it is very convenient for application as a routine diagnostic tool in experiments in which the desired spectral coverage is different from one test to the next. The WB-FSSR has been tested in imploding wire-array experiments on a 1  MA pulsed power machine, and x-ray spectra were recorded in the 1–20  Å spectral band using different orders of mica crystal reflection. Using a two mirror-symmetrically placed WB-FSSR configuration, it was also possible to distinguish between a real spectral shift and a shift of recorded spectral lines caused by the spatial distribution of the radiating plasma. A spectral resolution of about 2000 was demonstrated and a spatial resolution of ~100  µm was achieved in the spectral band of 5–10  Å in second order of mica reflection. A simple method of numerical analysis of spectrograph capability is proposed. ©2008 American Institute of Physics
History: Received 9 November 2007; accepted 22 December 2007; published 18 January 2008
Permalink: http://link.aip.org/link/?RSINAK/79/013106/1
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KEYWORDS and PACS

Keywords
PACS
  • 07.85.Nc
    X-ray and γ-ray spectrometers
  • 52.70.-m
    Plasma diagnostic techniques and instrumentation
  • 61.05.C-
    X-ray diffraction and scattering (condensed matter structure determination)
  • YEAR: 2008

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PUBLICATION DATA

ISSN:
0034-6748 (print)   1089-7623 (online)
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