Wide band focusing x-ray spectrograph with spatial resolution

Journal Article · Tue Jan 15 04:00:00 EST 2008 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.2834834· OSTI ID:21024728

Pikuz, S A; Douglass, J D; Shelkovenko, T A; Sinars, D B; Hammer, D A ^[1]

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1. Cornell University, Ithaca, NY 14853 (United States)

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 A 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 {approx}100 {mu}m was achieved in the spectral band of 5-10 A in second order of mica reflection. A simple method of numerical analysis of spectrograph capability is proposed.

• OSTI ID: 21024728
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 79; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
APERTURES
CRYSTALS
FOCUSING
MICA
MIRRORS
NUMERICAL ANALYSIS
PLASMA
REFLECTION
SPATIAL DISTRIBUTION
SPATIAL RESOLUTION
SPECTRAL SHIFT
X RADIATION
X-RAY SPECTRA
X-RAY SPECTROMETERS