Cyclotron instability of trapped alpha-particles in a Tokamak with elliptic cross-section
Abstract
Cyclotron excitation of fast magnetosonic waves by trapped alpha-particles produced by fusion in a Tokamak with elliptic cross-section is studied. Earlier, this phenomenon was studied for a Tokamak with circular cross-section. It is shown that ellipticity of the Tokamak cross-section considerably affects the growth rate of oscillations. General expressions for the growth rate of the oscillations are obtained and are analyzed in a limiting case when the wave frequency is close to the cyclotron harmonics of strongly trapped particles. It is shown that the growth rate of oscillations excited by strongly trapped alpha-particles is considerably smaller at large ellipticity of the Tokamak cross-section, than in the case of a Tokamak with circular cross-section.
- Publication:
-
Nuclear Fusion
- Pub Date:
- July 1976
- Bibcode:
- 1976NucFu..16..465K
- Keywords:
-
- Alpha Particles;
- Controlled Fusion;
- Cyclotron Resonance;
- Magnetoacoustic Waves;
- Magnetohydrodynamic Stability;
- Plasma-Particle Interactions;
- Tokamak Devices;
- Cyclotron Frequency;
- Integral Transformations;
- Particle Trajectories;
- Plasma Oscillations;
- Reactor Technology;
- Trapped Particles;
- Plasma Physics