中国物理B ›› 2007, Vol. 16 ›› Issue (12): 3742-3746.doi: 10.1088/1009-1963/16/12/031

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Numerical investigation of non-local electron transport in laser-produced plasmas

董亚林, 赵 斌, 郑 坚   

  1. CAS Key Laboratory of Basic Plasma Physics, University of Science and Technology of China, Hefei 230026, China;Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
  • 出版日期:2007-12-20 发布日期:2007-12-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos~10375064, 10575102, 10625523), and the National High Technology Inertial Confinement Fusion Foundation of China.

Numerical investigation of non-local electron transport in laser-produced plasmas

Dong Ya-Lin(董亚林)a)b), Zhao Bin(赵斌)a)b), and Zheng Jian(郑坚)a)b)†   

  1. a CAS Key Laboratory of Basic Plasma Physics, University of Science and Technology of China, Hefei 230026, China; b Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
  • Online:2007-12-20 Published:2007-12-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos~10375064, 10575102, 10625523), and the National High Technology Inertial Confinement Fusion Foundation of China.

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摘要： Non-local electron transport in laser-produced plasmas under inertial confinement fusion (ICF) conditions is studied based on Fokker-Planck (FP) and hydrodynamic simulations. A comparison between the classical Spitzer--H\"arm (SH) transport model and non-local transport models has been made. The result shows that among those non-local models the Epperlein and Short (ES) model of heat flux is in reasonable agreement with the FP simulation in overdense region. However, the non-local models are invalid in the hot underdense plasmas. Hydrodynamic simulation is performed with the flux limiting model and the non-local model, separately. The simulation results show that in the underdense region of the laser-produced plasmas the temperature given by the flux limiting model is significantly higher than that given with the non-local model.

关键词: laser plasma, non-local electron transport, Fokker--Planck simulation, hydrodynamic

Abstract: Non-local electron transport in laser-produced plasmas under inertial confinement fusion (ICF) conditions is studied based on Fokker-Planck (FP) and hydrodynamic simulations. A comparison between the classical Spitzer--H?rm (SH) transport model and non-local transport models has been made. The result shows that among those non-local models the Epperlein and Short (ES) model of heat flux is in reasonable agreement with the FP simulation in overdense region. However, the non-local models are invalid in the hot underdense plasmas. Hydrodynamic simulation is performed with the flux limiting model and the non-local model, separately. The simulation results show that in the underdense region of the laser-produced plasmas the temperature given by the flux limiting model is significantly higher than that given with the non-local model.

Key words: laser plasma, non-local electron transport, Fokker--Planck simulation, hydrodynamic

中图分类号:  (Transport properties)

  • 52.25.Fi
52.50.Jm (Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.)) 52.57.-z (Laser inertial confinement) 52.65.Ff (Fokker-Planck and Vlasov equation)