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Title: Characterization of thermal transport and evolution of Au plasma in ICF experiments by Thomson scattering

Journal Article · · Physics of Plasmas
DOI: https://doi.org/10.1063/5.0060005 · OSTI ID:1860796

Here, this paper demonstrates the capability of optical Thomson scattering (OTS) to measure thermal transport, and provides support to radiation hydrodynamic and kinetic simulations of electron thermal transport and plasma evolution. OTS theory and plasma simulations are applied to the interpretation of experimental measurements of laser-produced plasma from spherical gold targets on the OMEGA laser facility. The dynamical form factor, S($$\vec{k}$$, ω), of electron density fluctuations that is used in the fitting of Thomson scattering spectra includes ion–ion collisions and effects of non-Maxwellian distribution functions. OTS measurements and their interpretation are consistent with the nonlocal transport model in radiation hydrodynamic simulations as well as with kinetic simulations in the second half of the probe pulse duration. In particular, the reversal of heat transport during cooling is observed to be consistent with simulations, while some discrepancies are noted during the initial heating of the Au targets.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1860796
Report Number(s):
LLNL-JRNL-823504; 1035800
Journal Information:
Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 1 Vol. 29; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Characterization of thermal transport and evolution of Au plasma in ICFexperiments by Thomson scattering - TS data dataset January 2021
Characterization of thermal transport and evolution of Au plasma in ICFexperiments by Thomson scattering - TS data dataset January 2021
Characterization of thermal transport and evolution of Au plasma in ICFexperiments by Thomson scattering - TS data dataset January 2021