Lineshape measurements of He-β spectra on the ORION laser facility

Beiersdorfer, P.; Brown, G. V.; Shepherd, R.; Allan, P.; Brown, C. R. D.; Hill, M. P.; Hoarty, D. J.; Hobbs, L. M. R.; James, S. F.; Chung, H. K.; Hill, E.

doi:10.1063/1.4965233

Title: Lineshape measurements of He-β spectra on the ORION laser facility

Journal Article · Tue Oct 25 00:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4965233· OSTI ID:1411700

^[1]; Brown, G. V. ^[1]; Shepherd, R. ^[1]; Allan, P. ^[2]; Brown, C. R. D. ^[2];

^[2]; Hoarty, D. J. ^[2];

^[2]; James, S. F. ^[2]; Chung, H. K. ^[3]; Hill, E. ^[4]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
AWE plc, Reading (United Kingdom)
Vienna International Centre, Vienna (Austria)
Imperial College, London (United Kingdom)

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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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1411700

Alternate ID(s):: OSTI ID: 1421103

Report Number(s):: LLNL-JRNL-695535

Journal Information:: Physics of Plasmas, Vol. 23, Issue 10; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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Experimental comparison of spherically bent HAPG and Ge crystals Hell, N.; Lockard, T.; Beiersdorfer, P. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038003	journal	October 2018
High-resolution measurements of ${Cl}^{15 +}$ line shifts in hot, solid-density plasmas Beiersdorfer, P.; Brown, G. V.; McKelvey, A. Physical Review A, Vol. 100, Issue 1 https://doi.org/10.1103/physreva.100.012511	journal	July 2019
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