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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Evolution and hot electron generation of laser–plasma instabilities in direct-drive inertial confinement fusion
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September 2023
Research Article|
September 07 2023
Evolution and hot electron generation of laser–plasma instabilities in direct-drive inertial confinement fusion
S. H. Cao
;
S. H. Cao
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Visualization, Writing – original draft, Writing – review & editing)
1
Department of Mechanical Engineering, University of Rochester
, Rochester, New York 14627, USA
2
Laboratory for Laser Energetics, University of Rochester
, Rochester, New York 14627, USA
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C. Ren
C. Ren
a)
(Conceptualization, Funding acquisition, Investigation, Methodology, Project administration, Resources, Supervision, Writing – review & editing)
1
Department of Mechanical Engineering, University of Rochester
, Rochester, New York 14627, USA
2
Laboratory for Laser Energetics, University of Rochester
, Rochester, New York 14627, USA
3
Department of Physics and Astronomy, University of Rochester
, Rochester, New York 14627, USA
a)Author to whom correspondence should be addressed: chuang.ren@rochester.edu
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a)Author to whom correspondence should be addressed: chuang.ren@rochester.edu
Phys. Plasmas 30, 092701 (2023)
Article history
Received:
June 12 2023
Accepted:
August 17 2023
Citation
S. H. Cao, C. Ren; Evolution and hot electron generation of laser–plasma instabilities in direct-drive inertial confinement fusion. Phys. Plasmas 1 September 2023; 30 (9): 092701. https://doi.org/10.1063/5.0161865
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