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An Ingenious Plasma Simulation Model for Large-Scale System with Self-Consistent Electron Dynamics

机译：具有自洽电子动力学的大型系统的精巧等离子体仿真模型

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摘要

An ingenious model for large-scale plasma simulations is proposed. An artificial permittivity ε ? much grater than ε 0 (permittivity of free space) is introduced to the Poisson equation, ?· ( ε ?? φ ) = ? ρ ( φ is electrostatic potential and ρ is charge density), and the Debye length is artificially elongated. A large-scale system with a reasonable number of spatial grids can be treated stably even for including the self-consistent electron dynamics. A dielectric tensor is adopted for the three-dimensional global simulation of tokamak plasmas in the cylindrical coordinates ( R , θ , Z ). A diagonal element εθθ for toroidal axis θ is set much larger than those for the poloidal plane, εRR = εZZ = ε ?. Number of toroidal meshes Nθ can be reduced enough smaller than that of poloidal-plane meshes, NR and NZ , in comparison with N θ NR , NZ for the usual case of isotropic ε ?.
机译：提出了一种用于大规模等离子体模拟的巧妙模型。人工介电常数将比ε0（自由空间的介电常数）大得多的刨丝率引入泊松方程，？·（ε??φ）=？ ρ（φ是静电势，ρ是电荷密度），并且德拜长度被人为拉长。即使包含自洽的电子动力学，也可以稳定地处理具有合理数量的空间网格的大型系统。在圆柱坐标（R，θ，Z）中对托卡马克等离子体的三维整体模拟采用介电张量。环形轴θ的对角元素εθθ设置得比极向面的对角元素εθθ大得多，εRR=εZZ=ε。与各向同性ε？的Nθ> NR，NZ相比，环形网格的数量Nθ可以比极向面的网格NR和NZ减小得足够小。

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