托卡马克等离子体边缘梯度和杂质辐射驱动的湍流理论

本文考虑了托卡马克等离子体边缘的物理性质，由电子连续性方程和离子动量平衡方程导出了电子密度演变方程。分析了各种驱动源在线性和非线性发展过程中的作用。电子密度梯度直接影响密度涨落，并通过杂质辐射与温度涨落相互耦合，进而影响静电势涨落。理论结果能够分别与高、低密度装置上的实验较好地相符合。

THEORY OF TURBULENCE DRIVEN BY EDGE GRADIENTS AND IMPURITY RADIATION IN TOKAMAKS

A new equation of density evolution is derived from the electron continuity equation and the ion momentum balance equation. The effects of different drive sources in linear and nonlinear process are discussed. During the impurity radiation, the density perturbation driven by density gradient couples with the temperature one and then affects the electrostatic potential one. Compared with the other models , the new theoretical conclusion is in better agreement with the experimental results from both the high and low density tokamaks.