Microtearing Modes and Anomalous Transport in Tokamaks
Abstract
Microtearing (high-m) modes driven by the electron temperature gradient are found to be unstable for present tokamak parameters. A self-consistent calculation of the nonlinear saturation of this instability yields magnetic fluctuations |B~|B~=ρeLT. The associated crossfield electron thermal conductivity is shown to be inversely proportional to density, consistent with Alcator scaling, and comparable in magnitude with that inferred from experiments.
- Publication:
-
Physical Review Letters
- Pub Date:
- April 1980
- DOI:
- 10.1103/PhysRevLett.44.994
- Bibcode:
- 1980PhRvL..44..994D
- Keywords:
-
- Magnetohydrodynamic Stability;
- Plasma Control;
- Tokamak Devices;
- Toroidal Plasmas;
- Transport Theory;
- Crossed Fields;
- Electron Energy;
- Electron Scattering;
- Energy Technology;
- Energy Transfer;
- Thermal Conductivity;
- Plasma Physics;
- 52.25.Fi;
- 52.35.Mw;
- 52.55.Gb;
- Transport properties;
- Nonlinear phenomena: waves wave propagation and other interactions