Lineshape measurements of He-β spectra on the ORION laser facility [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 2016.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description:: Article numbers 101,211 : digital, PDF file
Additional Creators:: Lawrence Berkeley National Laboratory
United States. Department of Energy
United States. Department of Energy. Office of Scientific and Technical Information
Access Online:: www.osti.gov

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Summary:

Here, we have utilized a newly developed high-resolution X-ray spectrometer to measure the shapes of spectral lines produced from laser-irradiated targets on the Orion laser facility in the United Kingdom. We present measurements of the He-β spectra of chlorine and chromium from targets irradiated by either a long-pulse or a short-pulse laser beam. The experimental conditions provide a spread in plasma density ranging from about 1019 to about 1024 cm–3. We present spectral calculations that show that the relative intensities of the Li-like satellite lines can be used to infer the density in the lower range, especially if the lithiumlike satellite lines are well resolved. In addition, we use the Stark-broadened width of the He-β line to infer densities above about 1022 cm–3. In the case of a short-pulse irradiated chromium foil, we find that the He-like chromium is produced at a density of almost 8 g/cm3, i.e., solid density. In addition, we can infer the electron temperature from the observation of dielectronic recombination satellite lines.

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Published through SciTech Connect.
10/25/2016.
"llnl-jrnl--695535"
Physics of Plasmas 23 10 ISSN 1070-664X AM
P. Beiersdorfer; G. V. Brown; R. Shepherd; P. Allan; C. R. D. Brown; M. P. Hill; D. J. Hoarty; L. M. R. Hobbs; S. F. James; H. K. Chung; E. Hill.

Funding Information:

AC52-07NA27344

View MARC record | catkey: 23496947

Lineshape measurements of He-<i>β</i> spectra on the ORION laser facility [electronic resource].

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