Observation of Nonlocal Heat Flux Using Thomson Scattering

Henchen, R. J.; Sherlock, M.; Rozmus, W.; Katz, J.; Cao, D.; Palastro, J. P.; Froula, D. H.

doi:10.1103/PhysRevLett.121.125001

Title: Observation of Nonlocal Heat Flux Using Thomson Scattering

Journal Article · 18 September 2018 · Physical Review Letters

DOI: https://doi.org/10.1103/PhysRevLett.121.125001 · OSTI ID:1476314

Henchen, R. J. ^[1]; Sherlock, M. ^[2]; Rozmus, W. ^[3]; Katz, J. ^[4]; Cao, D. ^[4]; Palastro, J. P. ^[4]; Froula, D. H. ^[5]

Univ. of Rochester, NY (United States). Lab. for Laser Energetics and Dept. of Mechanical Engineering; Laboratory for Laser Energetics, University of Rochester
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of Alberta, Edmonton, AB (Canada). Dept. of Physics
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Univ. of Rochester, NY (United States). Lab. for Laser Energetics and Dept. of Physics and Astronomy

Here, nonlocal heat flux was measured in laser-produced coronal plasmas using a novel Thomson scattering technique. The measured heat flux was smaller than the classical values inferred from the measured plasma conditions in regions with large temperature gradients and agreed with classical values for weak gradients. Vlasov–Fokker–Planck simulations self consistently calculated the electron distribution functions used to reproduce the measured Thomson scattering spectra and to determine the heat flux. Multigroup nonlocal simulations overestimated the measured heat flux.

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Research Organization:: Univ. of Rochester, NY (United States). Lab. for Laser Energetics; Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); New York State Energy Research and Development Authority (NYSERDA)

Grant/Contract Number:: NA0001944; AC52-07NA27344

OSTI ID:: 1476314

Report Number(s):: 2018--71; 1435; 2018-71, 2394, 1436

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 121; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Improvement in Thomson scattering diagnostic precision via fitting the multiple-wavenumber spectra simultaneously Liu, Yaoyuan; Ding, Yongkun; Zheng, Jian Review of Scientific Instruments, Vol. 90, Issue 8 https://doi.org/10.1063/1.5110932	journal	August 2019
Single shot high bandwidth laser plasma probe Ludwig, J. D.; Michel, P.; Chapman, T. Physics of Plasmas, Vol. 26, Issue 11 https://doi.org/10.1063/1.5124401	journal	November 2019
Mitigation of self-focusing in Thomson scattering experiments Hansen, A. M.; Turnbull, D.; Katz, J. Physics of Plasmas, Vol. 26, Issue 10 https://doi.org/10.1063/1.5125249	journal	October 2019
Two-colour interferometry and Thomson scattering measurements of a plasma gun Hare, J. D.; MacDonald, J.; Bland, S. N. Plasma Physics and Controlled Fusion, Vol. 61, Issue 8 https://doi.org/10.1088/1361-6587/ab2571	journal	June 2019
Investigation of picosecond thermodynamics in a laser-produced plasma using Thomson scattering Davies, A. S.; Haberberger, D.; Katz, J. Plasma Physics and Controlled Fusion, Vol. 62, Issue 1 https://doi.org/10.1088/1361-6587/ab49db	journal	October 2019
Kinetic simulations of fusion ignition with hot-spot ablator mix Sadler, James D.; Lu, Yingchao; Spiers, Benjamin Physical Review E, Vol. 100, Issue 3 https://doi.org/10.1103/physreve.100.033206	journal	September 2019
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Title: Observation of Nonlocal Heat Flux Using Thomson Scattering

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