30-60 MHz FWCD system on DIII-D: power division, phase control and tuning for a four-event antenna array

Author

Pinsker, R.I. ; Mayberry, M.J. ; Petty, C.C. ; Cary, W.P. ; Pusl, J. ; Remsen, D. ; Baity, F.W. ; Goulding, R.H. ; Hofmann, D.J.

Author_Institution

General Atomics, San Diego, CA, USA

fYear

1991

fDate

30 Sep-3 Oct 1991

Firstpage

115

Abstract

The 2-MW fast wave current drive system on DIII-D is intended to provide near-term demonstration of up to 0.3 MA of current driven by the fast wave. The system used to drive the four-element phased antenna array which produces the required directional spectrum is presented. This system must be able to cope with strong coupling between antenna elements and the time-varying plasma load seen by the antennas. Computer modeling shows that this system should be able to maintain a directional spectrum at full power under most anticipated load conditions

Keywords

Tokamak devices; antennas in plasma; fusion reactor theory and design; plasma radiofrequency heating; 30 to 60 MHz; DIII-D; antenna elements; directional spectrum; fast wave current drive system; four-element phased antenna array; time-varying plasma load; Antenna arrays; Directive antennas; Feeds; Impedance matching; Inductance; Loaded antennas; Mutual coupling; Phase control; Phased arrays; Tokamaks;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering, 1991. Proceedings., 14th IEEE/NPSS Symposium on

Conference_Location

San Diego, CA

Print_ISBN

0-7803-0132-3

Type

conf

DOI

10.1109/FUSION.1991.218938

Filename

218938