Lineshape measurements of He-<i>β</i> spectra on the ORION laser facility [electronic resource].
- 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
- 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 10<sup>19</sup> to about 10<sup>24</sup> cm<sup>–3</sup>. 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 10<sup>22</sup> cm<sup>–3</sup>. 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/cm<sup>3</sup>, i.e., solid density. In addition, we can infer the electron temperature from the observation of dielectronic recombination satellite lines.
- Published through SciTech Connect.
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:
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