Two-fluid low-collisionality equilibrium model and application to spherical torus plasmas
Two-fluid low-collisionality equilibrium model and application to spherical torus plasmas
复制标题
二流体低碰撞平衡模型及其在球形环面等离子体中的应用
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Y
中科院分区：
文献类型：
--
作者：
A. Ishida;L. Steinhauer;Y
开发了一种低碰撞性的双流体平衡模型，包括新的流动奇异条件。该描述适用于快速旋转、高性能的国家球形环面实验 (NSTX) [Peng et al., Plasma Phys.受控融合 47，B263 (2005)]。该模型复制了示例平衡的主要特征，例如示例平衡的电子和离子温度、密度和环形流的分布。这是首次对接近热速度的快速离子流进行二维平衡的全双流体计算。结果出现了几个重要特征：（1）由于电子旋转流反转，离子环形电流超过环形等离子体电流； (2) 核心区域的离子流大致平行于磁场，即核心区域的离子流体几乎不受力； (3) E+ui×B 与零相差很大，因此 E×B 漂移无法描述垂直于磁体的离子和电子流......
A two-fluid equilibrium model with low-collisionality is developed including a new flow-singularity condition. This description is applied to the rapidly rotating, high-performance National Spherical Torus eXperiment (NSTX) [Peng et al., Plasma Phys. Controlled Fusion 47, B263 (2005)]. The model replicates the primary features of an example equilibrium, such as the profiles of electron and ion temperatures, density, and toroidal flow of an example equilibrium. This is the first full-two-fluid computation of two-dimensional equilibrium with rapid ion flow near the thermal speed. In consequence several important features emerge: (1) the ion toroidal current exceeds the toroidal plasma current as a result of electron rotational flow reversal; (2) the ion flow in the core region is roughly parallel to the magnetic field, i.e., the ion fluid in the core is nearly force free; (3) E+ui×B differs considerably from zero, so that the E×B drift fails to describe the ion and electron flows perpendicular to the magnet...