Boundedplasma theory of radiofrequency heating of toroidal machines
Abstract
A systematic study is made of the coupling of RF energy to a plasma column by means of an external set of current sources in the toroidal cavity constituted by the machine. The plasma is described by hotfluid theory with effective collision frequencies; the latter are either particularized to describe analytically linear collisionless damping or used as parameters to simulate other loss mechanisms like the nonlinear ones. Special emphasis is placed on the boundedplasma effects in the entire frequency range. In particular, magnetoacoustic resonances may strongly increase the efficiency of RF energy transfer when the physical absorption mechanisms are electron TTMP or ion cyclotron resonance. At higher frequency, resonance modes of the coaxial type are found in which the plasma plays the role of the central conductor of a coaxial toroidal cavity.
 Publication:

Nuclear Fusion
 Pub Date:
 February 1975
 Bibcode:
 1975NucFu..15...75M
 Keywords:

 Plasma Cylinders;
 Plasma Heating;
 Radio Frequency Heating;
 Toroidal Plasmas;
 Absorption Spectra;
 Coils;
 Collisional Plasmas;
 Frequency Response;
 Magnetosonic Resonance;
 Mathematical Models;
 Plasma Density;
 Plasma Resonance;
 Plasma Physics