Evolution and hot electron generation of laser–plasma instabilities in direct-drive inertial confinement fusion

Cao, S. H.; Ren, Chuang

doi:10.1063/5.0161865

Title: Evolution and hot electron generation of laser–plasma instabilities in direct-drive inertial confinement fusion

Journal Article · 06 September 2023 · Physics of Plasmas

DOI: https://doi.org/10.1063/5.0161865 · OSTI ID:2008322

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University of Rochester, NY (United States); Laboratory for Laser Energetics, University of Rochester
University of Rochester, NY (United States)

A series of 2D in-plane plane wave particle-in-cell simulations find distinctive paths of laser-plasma instability evolution in OMEGA-scale implosions, depending on the initial electron temperature. At low temperatures, two-plasmon decay (TPD) dominates in both initial growth and the steady state. At high temperatures, the initial dominant modes switch to stimulated Raman scattering, but TPD still dominates a steady state characterized by cavitation and Langmuir turbulence. A hot electron scaling is also obtained from the simulations that, when combined with laser/plasma conditions from hydro simulations, can predict hot electron generation in implosions that do not employ smoothing-by-spectral-dispersion (SSD). It also shows that under the same laser/plasma conditions, SSD can reduce hot electron generation.

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Research Organization:: University of Rochester, NY (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0003856

OSTI ID:: 2008322

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 30; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Title: Evolution and hot electron generation of laser–plasma instabilities in direct-drive inertial confinement fusion

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