论文标题
具有较大粒子通量的多物种等离子体中的痕量杂质传输
Trace Impurity Transport in Multi-Species Plasmas with Large Particle Fluxes
论文作者
论文摘要
燃烧的融合等离子体具有巨大的燃料内通量和灰烬的外向通量。现有的杂质运输理论并不能说明如此大的通量的稳态环境。在本文中，我们扩展了古典运输理论，以说明这种通量的背景。在主要的两离子物种磁化等离子体中，两种物种的相反定向来源保持了相反的密度梯度，痕量杂质离子被证明与较大的质量离子一致。这种意外的行为是使用MITN（多离子传输数值求解器）代码在分析和模拟上得出的。结果表明，边缘燃料P-B11融合的潜在优势在提取高Z杂质以及基于等离子体的分离方法中的可能应用。
A burning fusion plasma has a large inwards flux of fuel and outwards flux of ash. Existing impurity transport theories do not account for a steady-state environment of such large fluxes. In this paper, we extend classical transport theory to account for a background of such fluxes. In a mainly two-ion species magnetized plasma, with oppositely directed density gradients maintained by oppositely directed sources of the two species, trace impurity ions are shown to align with the larger mass ions. This unexpected behavior is derived analytically and simulated numerically using the MITNS (Multiple-Ion Transport Numerical Solver) code. The result suggests a potential advantage of edge-fueled p-B11 fusion in extracting high-Z impurities, and possible applications in plasma-based separation methods.
