Warm plasma dispersion relation of the fast Alfven wave for asymmetrical heating current drive

Author

Gahl, John M. ; Ishihara, Osamu ; Hagler, Marion O. ; Kristiansen, Magne

Author_Institution

Dept. of Electr. Eng., Texas Tech. Univ., Lubbock, TX, USA

Volume

17

Issue

3

fYear

1989

fDate

6/1/1989 12:00:00 AM

Firstpage

520

Lastpage

523

Abstract

Experimental observation of current drive by asymmetrical heating of ions in the Texas Tech Tokamak suggests that penetration of the fast Alfven wave near the fundamental ion-cyclotron resonance is restricted. A numerical study of the warm plasma dispersion relation near the ion-cyclotron resonance does indeed show this effect. The data reveal that, as the wave approaches the resonant layer from the high or low field side of the torus, it first passes through a region where asymmetrical heating takes place and the wave energy is absorbed by ions moving with high velocity parallel to the magnetic field

Keywords

cyclotron resonance; dispersion relations; plasma radiofrequency heating; plasma toroidal confinement; plasma waves; Texas Tech Tokamak; asymmetrical heating; asymmetrical heating current drive; fast Alfven wave; fundamental ion-cyclotron resonance; high field side; low field side; magnetic field; plasma dispersion relation; resonant layer; torus; wave energy; Dispersion; Drives; Frequency; Hydrogen; Magnetic resonance; Plasma waves; Probes; Space heating; Tokamaks; Toroidal magnetic fields;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.32265

Filename

32265