High-resolution compact Johann crystal spectrometer with the Livermore electron beam ion trap

A compact high-resolution (λ/Δλ≈10 000) spherically bent crystal spectrometer in the Johann geometry was recently installed and tested on the Lawrence Livermore National Laboratory SuperEBIT electron beam ion trap. The curvature of the mica (002) crystal grating allows for higher collection efficien...

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Bibliographic Details
Published in:Review of Scientific Instruments 2004-10, Vol.75 (10), p.3717-3719
Main Authors: Robbins, D. L., Chen, H., Beiersdorfer, P., Faenov, A. Ya, Pikuz, T. A., May, M. J., Dunn, J., Smith, A. J.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION
ATOMIC AND MOLECULAR PHYSICS
CONFIGURATION
EFFICIENCY
ELECTRON BEAMS
GEOMETRY
LAWRENCE LIVERMORE NATIONAL LABORATORY
MICA
ORIENTATION
POLARIZATION
SPECTROMETERS
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Summary:A compact high-resolution (λ/Δλ≈10 000) spherically bent crystal spectrometer in the Johann geometry was recently installed and tested on the Lawrence Livermore National Laboratory SuperEBIT electron beam ion trap. The curvature of the mica (002) crystal grating allows for higher collection efficiency compared to the flat and cylindrically bent crystal spectrometers commonly used on the Livermore electron beam ion traps. The spectrometer’s Johann configuration enables orientation of its dispersion plane to be parallel to the electron beam propagation. Used in concert with a crystal spectrometer, whose dispersion plane is perpendicular to the electron beam propagation, the polarization of x-ray emission lines can be measured.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1781753