Vlasov-Fokker-Planck Simulations for High-Power Laser-Plasma Interactions  

作　　者：Su-Ming Weng Zheng-Ming Sheng Hui Xu Jie Zhang 

机构地区：[1]Beijing National Laboratory of Condensed Matter Physics,Institute of Physics,CAS,Beijing 100190,China [2]Key Laboratory for Laser Plasmas(MoE)and Department of Physics,Shanghai Jiaotong University,Shanghai 200240,China [3]Theoretical Quantum Electronics(TQE),Technische Universit¨at Darmstadt,D-64289 Darmstadt,Germany [4]Shandong Provincial Key Laboratory of Laser Polarization and Information Technology,Department of Physics,Qufu Normal University,Qufu 273165,China

出　　处：《Communications in Computational Physics》2012年第4期1236-1260,共25页计算物理通讯（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(Grants No.11075105,10947108);the National Basic Research Program of China(Grant No.2009GB105002);One of the authors(S.M.W.)wishes to thank Professor P.Mulser of Technische Universitat Darmstadt and Professor M.Murakami of Osaka University for fruitful discussions and suggestions and acknowledges support from the Alexander von Humboldt Foundation.H.Xu acknowledges support from the Natural Science Foundation of Shandong Province(Grand No.Q2008A05).

摘　　要：A review is presented on our recent Vlasov-Fokker-Planck(VFP)simulation code development and applications for high-power laser-plasma interactions.Numerical schemes are described for solving the kinetic VFP equation with both electronelectron and electron-ion collisions in one-spatial and two-velocity(1D2V)coordinates.They are based on the positive and flux conservation method and the finite volume method,and these twomethods can insure the particle number conservation.Our simulation code can deal with problems in high-power laser/beam-plasma interactions,where highly non-Maxwellian electron distribution functions usually develop and the widely-used perturbation theories with the weak anisotropy assumption of the electron distribution function are no longer in point.We present some new results on three typical problems:firstly the plasma current generation in strong direct current electric fields beyond Spitzer-H¨arm’s transport theory,secondly the inverse bremsstrahlung absorption at high laser intensity beyond Langdon’s theory,and thirdly the heat transport with steep temperature and/or density gradients in laser-produced plasma.Finally,numerical parameters,performance,the particle number conservation,and the energy conservation in these simulations are provided.

关 键 词：Vlasov-Fokker-Planck equation electric conductivity inverse bremsstrahlung nonlocal heat transport positive and flux conservation method finite volume method 

分 类 号：O53[理学—等离子体物理]