Further Numerical Study of the Dissipative Trapped-Electron Instability in Tokamaks Including Magnetic Curvature Drift Resonances.
NAVAL RESEARCH LAB WASHINGTON D C
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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 thetarho 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, gammak sub theta, sup 2, predicts losses comparable to those observed in TFR, ST, and ATC.
- Fusion Devices (Thermonuclear)
- Plasma Physics and Magnetohydrodynamics