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A Vlasov-Fokker-Planck code for high energy density physics

机译:用于高能量密度物理学的Vlasov-Fokker-Planck代码

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摘要

OSHUN is a parallel relativistic 2D3P Vlasov-Fokker-Planck code, developed primarily to study electron transport and instabilities pertaining to laser-produced-including laser-fusion-plasmas. It incorporates a spherical harmonic expansion of the electron distribution function, where the number of terms is an input parameter that determines the angular resolution in momentum-space. The algorithm employs the full 3D electromagnetic fields and a rigorous linearized Fokker-Planck collision operator. The numerical scheme conserves energy and number density. This enables simulations for plasmas with temperatures from MeV down to a few eV and densities from less than critical to more than solid. Kinetic phenomena as well as electron transport physics can be recovered accurately and efficiently.
机译:OSHUN是平行相对论的2D3P Vlasov-Fokker-Planck编码,主要用于研究电子传输和与激光产生(包括激光融合等离子体)有关的不稳定性。它结合了电子分布函数的球谐展开,其中项数是确定动量空间中角分辨率的输入参数。该算法利用了完整的3D电磁场和严格的线性化Fokker-Planck碰撞算子。该数值方案节省了能量和数量密度。这样就可以对温度从MeV降至几个eV且密度从低于临界值到高于固体的等离子体进行仿真。动力学现象以及电子传输物理学都可以准确有效地恢复。

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