High and low frequency Alfven modes in tokamaks

摘要

The article presents an analysis of the typical features of shear Alfven waves in tokamak plasmas in a frequency domain ranging from the ‘high' frequencies (ω≈＝υA/2qRo, where υA is the Alfven speed and qRo is the tokamak connection length) of the toroidal gap to the ‘low' frequencies, comparable with the thermal ion diamagnetic frequency ω_*pi and/or the thermal ion transit frequency ω_ti = υti/qRo (where υti is the ion thermal speed).