Downstream heat flux profile versus midplane T profile in tokamaks
Downstream heat flux profile versus midplane T profile in tokamaks
复制标题
托卡马克中的下游热通量分布与中平面 T 分布
DOI：
10.1063/1.3280011
复制
发表时间：
2010
影响因子：
2.2
通讯作者：
R. Goldston
中科院分区：
文献类型：
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作者：
R. Goldston
研究了托卡马克中平面刮离层(SOL)电子温度分布与偏滤器平行热流密度分布之间的关系。应用了一个考虑各向异性热扩散的等密度直线几何模型。将本征模分析应用于具有矩形几何和常数，但具有高度各向异性的热扩散系数的简化问题。对于具有各向异性温度依赖的热扩散系数的更现实的问题，也找到了一个非线性解。对于这两种情况，都开发了数值解，从等离子体中产生与空间相关的热通量，以及包括偏滤器支腿的模型的几何形状。对于恒定和随温度变化的热扩散率，发现在峰值的一半以下，偏滤器处的热流密度分布形状与中面温度分布形状相比，可以用最简单的两点模型的标度来描述。哈.。
The relationship between the midplane scrape-off-layer (SOL) electron temperature profile and the parallel heat flux profile at the divertor in tokamaks is investigated. A model is applied that takes into account anisotropic thermal diffusion in rectilinear geometry with constant density. Eigenmode analysis is applied to the simplified problem with rectangular geometry and constant, but highly anisotropic, thermal diffusivities. A nonlinear solution is also found for the more realistic problem with anisotropically temperature-dependent thermal diffusivities. Numerical solutions are developed for both cases, with spatially dependent heat flux emerging from the plasma, and geometry that includes a model for the divertor leg. For both constant and temperature-dependent thermal diffusivities, it is found that, below about one-half of its peak, the heat flux profile shape at the divertor, compared to the midplane temperature profile shape, is robustly described by the scaling of the simplest two-point model. H...