A Vlasov-Fokker-Planck code for high energy density physics
A Vlasov-Fokker-Planck code for high energy density physics
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DOI：
10.1016/j.jcp.2011.04.034
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发表时间：
2011-07
期刊：
影响因子：
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通讯作者：
M. Tzoufras;A. Bell;P. Norreys;F. Tsung
中科院分区：
文献类型：
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作者：
M. Tzoufras;A. Bell;P. Norreys;F. Tsung
Oshun是一个平行的相对论2D3P Vlasov-Fokker-Planck程序，主要用于研究激光产生的等离子体(包括激光聚变等离子体)的电子传输和不稳定性。它结合了电子分布函数的球谐展开，其中项数是决定动量空间中角分辨率的输入参数。该算法采用了全三维电磁场和严格线性化的Fokker-Planck碰撞算子。数值格式是能量守恒和数密度守恒的。这使得对温度从MeV到几eV，密度从低于临界到超过固体的等离子体进行模拟成为可能。可以准确、有效地恢复动力学现象和电子传输物理。
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.