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A generalized weight-based particle-in-cell simulation scheme

机译：一种基于重量的粒子内仿真方案

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摘要

A generalized weight-based particle simulation scheme suitable for simulating magnetized plasmas, where the zeroth-order inhomogeneity is important, is presented. The scheme is an extension of the perturbative simulation schemes developed earlier for particle-in-cell (PIC) simulations. The new scheme is designed to simulate both the perturbed distribution (δf) and the full distribution (full-F) within the same code. The development is based on the concept of multiscale expansion, which separates the scale lengths of the background inhomogeneity from those associated with the perturbed distributions. The potential advantage for such an arrangement is to minimize the particle noise by using δf in the linear stage of the simulation, while retaining the flexibility of a full-F capability in the fully nonlinear stage of the development when signals associated with plasma turbulence are at a much higher level than those from the intrinsic particle noise.
机译：呈现了一种适用于模拟磁化等级的磁化等级度重要性的广义重量的粒子仿真方案。 该方案是对粒子内（PIC）模拟的早期开发的扰动模拟方案的延伸。 新方案旨在模拟同一代码中的扰动分布（ΔF）和完整分布（全F）。 该开发基于多尺度扩展的概念，其将背景的尺度长度与与扰动分布相关联的人分开。 这种布置的潜在优点是通过在模拟的线性阶段中使用ΔF来最小化粒子噪声，同时当与等离子体湍流相关的信号时，在显影的完全非线性阶段保持全F级的灵活性 比来自内在粒子噪声的水平更高。

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