Numerical Study of the Dissipative Trapped-Electron Instability in Tokamaks.
Abstract
The dispersion relation for the dissipative trapped-electron mode including the effects of magnetic shear, finite ion Larmor radius, banana-plateau velocity space separation, ion temperature gradient, and ion-ion collisions is employed to examine the stability property of recent tokamak experiments. Instabilities, when they exist at all, mostly occur at k(rho sub i) about = 1, where (rho sub i) is the thermal ion Larmor radius. The often used anomalous heat conduction coefficient gamma/(k sup 2), predicts losses negligible compared to those observed experimentally.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1975
- Accession Number
- ADA013990
Entities
People
- Kworay Chu
- Wallace M. Manheimer
Organizations
- United States Naval Research Laboratory