Cyclotron instability of trapped alphaparticles in a Tokamak with elliptic crosssection
Abstract
Cyclotron excitation of fast magnetosonic waves by trapped alphaparticles produced by fusion in a Tokamak with elliptic crosssection is studied. Earlier, this phenomenon was studied for a Tokamak with circular crosssection. It is shown that ellipticity of the Tokamak crosssection 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 alphaparticles is considerably smaller at large ellipticity of the Tokamak crosssection, than in the case of a Tokamak with circular crosssection.
 Publication:

Nuclear Fusion
 Pub Date:
 July 1976
 Bibcode:
 1976NucFu..16..465K
 Keywords:

 Alpha Particles;
 Controlled Fusion;
 Cyclotron Resonance;
 Magnetoacoustic Waves;
 Magnetohydrodynamic Stability;
 PlasmaParticle Interactions;
 Tokamak Devices;
 Cyclotron Frequency;
 Integral Transformations;
 Particle Trajectories;
 Plasma Oscillations;
 Reactor Technology;
 Trapped Particles;
 Plasma Physics