Kugland, N. L., Gregori, G., Bandyopadhyay, S. et al. (13 more authors) (2009) Evolution of elastic x-ray scattering in laser-shocked warm dense lithium. Physical Review E. 066406. -. ISSN 1550-2376
Abstract
We have studied the dynamics of warm dense Li with near-elastic x-ray scattering. Li foils were heated and compressed using shock waves driven by 4-ns-long laser pulses. Separate 1-ns-long laser pulses were used to generate a bright source of 2.96 keV Cl Ly-alpha photons for x-ray scattering, and the spectrum of scattered photons was recorded at a scattering angle of 120 degrees using a highly oriented pyrolytic graphite crystal operated in the von Hamos geometry. A variable delay between the heater and backlighter laser beams measured the scattering time evolution. Comparison with radiation-hydrodynamics simulations shows that the plasma is highly coupled during the first several nanoseconds, then relaxes to a moderate coupling state at later times. Near-elastic scattering amplitudes have been successfully simulated using the screened one-component plasma model. Our main finding is that the near-elastic scattering amplitudes are quite sensitive to the mean ionization state Z and by extension to the choice of ionization model in the radiation-hydrodynamics simulations used to predict plasma properties within the shocked Li.
Metadata
Authors/Creators: |
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Keywords: | foils, ionisation, lithium, plasma diagnostics, plasma heating by laser, plasma shock waves, plasma simulation, ONE-COMPONENT PLASMA, STATISTICAL-MECHANICS, THOMSON SCATTERING, MONTE-CARLO, MATTER, ENERGY, EQUATION, CODE |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 07 Jun 2012 15:06 |
Last Modified: | 06 Dec 2023 10:51 |
Published Version: | https://doi.org/10.1103/PhysRevE.80.066406 |
Status: | Published |
Refereed: | Yes |
Identification Number: | https://doi.org/10.1103/PhysRevE.80.066406 |
Related URLs: |