Nonlocal Heat Transfer in a Laser Inertial Confinement Fusion for the Direct Irradiation Scheme

High gradients of electron temperature appear in plasma corona under direct laser irradiation of inertial confinement fusion targets. This results in nonlocality of heat transport. Such effect influence the efficiency of laser absorption, redistribute heat fluxes and could preheat plasma ahead the f...

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Bibliographic Details
Published in:JETP letters 2022-07, Vol.116 (2), p.83-89
Main Authors: Glazyrin, S. I., Lykov, V. A., Karpov, S. A., Karlykhanov, N. G., Gryaznykh, D. A., Bychenkov, V. Yu
Format: Article
Language:English
Subjects:
Atomic
Biological and Medical Physics
Biophysics
Electron energy
Heat flux
Heat transfer
Hydro- and Gas Dynamics
Inertial confinement fusion
Irradiation
Longitudinal waves
Molecular
Optical and Plasma Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Plasma
Quantum Information Technology
Solid State Physics
Spintronics
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Summary:High gradients of electron temperature appear in plasma corona under direct laser irradiation of inertial confinement fusion targets. This results in nonlocality of heat transport. Such effect influence the efficiency of laser absorption, redistribute heat fluxes and could preheat plasma ahead the front shock wave, therefore alter the compression adiabat. Ignition requires a specially tuned compression dynamics, so such an effect should be taken into account. Target simulations with nonlocal models show the decrease of compression efficiency and hot-spot parameters degradation compared to local models: Spitzer–Härm model with and without flux-limiter.
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364022601208