Equations for the evolution of the radial electric field and poloidal rotation in toroidally symmetric geometry
Equations for the evolution of the radial electric field and poloidal rotation in toroidally symmetric geometry
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DOI：
10.1063/1.872762
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发表时间：
1998-06
影响因子：
2.2
通讯作者：
A. Peeters
中科院分区：
文献类型：
--
作者：
A. Peeters
一组三个耦合的常微分方程，给出了密度的演变，径向电场，和极向等离子体旋转的连续性方程和动量平衡。它们包括那些被认为对L-（低）到H-（高）模式转变具有重要意义的过程的影响：中性摩擦，新古典粘度，径向压力梯度，轨道损失，通过探针的径向电流，异常应力和斯特林格自旋。该方程适用于任意环形对称几何形状，并包括磁表面中的非均匀性（例如中性摩擦）的影响。作为一个例子，非均匀中性摩擦在细长的几何形状进行了讨论。
A set of three coupled ordinary differential equations that give the evolution of the density, the radial electric field, and poloidal plasma rotation are derived from the continuity equation and momentum balance. They include the effect of those processes considered to be of importance for the L- (low) to H- (high) mode transition: neutral friction, neoclassical viscosity, the radial pressure gradient, orbit losses, a radial current through a probe, anomalous stresses, and Stringer spin up. The equations are valid for arbitrary toroidally symmetric geometry and include effects of non-uniformity (of for instance the neutral friction) in the magnetic surface. As an example, non-uniform neutral friction in an elongated geometry is discussed.