Further Numerical Study of the Dissipative Trapped-Electron Instability in Tokamaks Including Magnetic Curvature Drift Resonances.

摘要

The dispersion relation for the dissipative trapped-electron mode including the effects of magnetic shear, finite ion Larmor radius, banana-plateau velocity space separation, magnetic curvature drift resonance, and ion-ion collisions, etc. is used to examine the plasma stability of recent tokamak experiments. Regimes of importance of various effects in these experiments are also discussed. Instabilities mostly occur at (k sub theta)rho about = 1, where (k sub theta) is the azimuthal wave number and (rho sub i) is the ion Larmor radius. The often used anomalous heat conduction coefficient, gamma/(k sub theta, sup 2), predicts losses comparable to those observed in TFR, ST, and ATC.