论文标题
用于刮擦层等离子体的四维漂移模型
Four-dimensional drift-kinetic model for scrape-off layer plasmas
论文作者
论文摘要
一个四维的等离子体模型，能够以任意碰撞的形式描述Tokamak设备的刮擦层区域，以漂移减少的极限得出。该模型的基础是由保留完整的非线性库仑碰撞算子的漂移式方程提供的，并任意描述远离平衡分布函数。通过扩大分布函数的依赖性，以laguerre多项式为基础，并在垂直速度上整合到垂直速度，这是获得分布函数扩展系数的一组四维矩方程。库仑碰撞算子以及泊松方程，根据分布函数的垂直速度矩进行明确评估。
A four-dimensional plasma model able to describe the scrape-off layer region of tokamak devices at arbitrary collisionality is derived in the drift-reduced limit. The basis of the model is provided by a drift-kinetic equation that retains the full non-linear Coulomb collision operator and describes arbitrarily far from equilibrium distribution functions. By expanding the dependence of distribution function over the perpendicular velocity in a Laguerre polynomial basis and integrating over the perpendicular velocity, a set of four-dimensional moment equations for the expansion coefficients of the distribution function is obtained. The Coulomb collision operator, as well as Poisson's equation, are evaluated explicitly in terms of perpendicular velocity moments of the distribution function.
