Numerical investigation of ICRF antenna designs and heating schemes for Alcator C
Abstract
Intially, approximately 500 kW of RF power are launched through one port of Alcator C at a frequency of 180 to 220 MHz. A hot plasma slab model is used to examine antenna coupling and power deposition for second harmonic (H, B sub 0 = 6.7 T) heating regime. The plasma medium is assumed uniform in y and z and is stratified in x. Three dimensional, four mode field solutions are obtained by solution of the boundary condition equations in the x direction, and by Fourier transform methods in y and z. The dependence of radiation resistance upon coupling parameters such as antenna width and radial position are studied. This is interpreted in terms of the spectral (k/sub y/, k/sub z/) distribution of power, the effect of the evanescent region at the edge, and the attenuation length of the waves.
 Publication:

Presented at the 5th Topical Conf. on Radio Frequency Plasma Heating
 Pub Date:
 February 1983
 Bibcode:
 1983rfph.conf...22B
 Keywords:

 Antenna Couplers;
 Antenna Design;
 Plasma Slabs;
 Radiation Tolerance;
 Radio Frequency Heating;
 Boundary Conditions;
 Boundary Value Problems;
 Evanescence;
 Fourier Transformation;
 Hydrogen Plasma;
 Communications and Radar