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Title: Measurements of the K -Shell Opacity of a Solid-Density Magnesium Plasma Heated by an X-Ray Free-Electron Laser

Journal Article · · Physical Review Letters
 [1];  [1];  [1];  [1];  [2];  [3];  [3];  [3];  [4];  [4];  [4];  [4];  [4];  [5];  [6];  [1]
  1. Univ. of Oxford (United Kingdom)
  2. Intl Atomic Energy Agency (IAEA), Vienna (Austria)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Academy of Sciences of the Czech Republic (ASCR), Prague (Czech Republic). Inst. of Physics
  5. European X-ray Free-Electron Laser (XFEL), Schenefeld (Germany)
  6. Univ. of California, Berkeley, CA (United States)

We present measurements of the spectrally resolved x rays emitted from solid-density magnesium targets of varying sub-μm thicknesses isochorically heated by an x-ray laser. The data exhibit a largely thickness independent source function, allowing the extraction of a measure of the opacity to K-shell x rays within well-defined regimes of electron density and temperature, extremely close to local thermodynamic equilibrium conditions. The deduced opacities at the peak of the Kα transitions of the ions are consistent with those predicted by detailed atomic-kinetics calculations.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515; EP/L000849/1; EP/H035877/1; EP/P015794/1; 17-05076S; 17-05167S
OSTI ID:
1390602
Alternate ID(s):
OSTI ID: 1376934
Journal Information:
Physical Review Letters, Vol. 119, Issue 8; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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