Upgrade of the DIII-D RF systems

Author

Callis, R.W. ; Cary, W.P. ; Neill, R. C O ; Allen, J.C. ; Harris, T.E. ; deGrassie, J.S. ; Ferguson, S.W. ; Baity, F.W. ; Barber, G.C. ; Tooker, J.F. ; Phelps, D.A.

Author_Institution

Gen. Atomics, San Diego, CA, USA

Volume

1

fYear

1995

fDate

30 Sep-5 Oct 1995

Firstpage

812

Abstract

The DIII-D Advanced Tokamak Program requires the ability to modify the current density profile for extended time periods in order to achieve the improved plasma conditions now achieved with transient means. To support this requirement, DIII-D has just completed a major addition to its ion cyclotron range of frequency (ICRF) systems. This upgrade project added two new fast wave current drive (FWCD) systems, with each system consisting of a 2 MW, 30 to 120 MHz transmitter, an all ceramic insulated transmission line, and water-cooled four-strap antenna. With this addition of 4 MW of FWCD power to the original 2 MW, 30 to 60 MHz capability, experiments can be performed with centrally localized current drive enhancement. For off-axis current modification, plans are in place to add 110 GHz electron cyclotron heating (ECH) power to DIII-D. Initially, 3 MW of power will be available with plans to increase the power to 6 MW and to 10 MW

Keywords

antennas in plasma; fusion reactor design; fusion reactor ignition; fusion reactors; plasma radiofrequency heating; plasma toroidal confinement; 10 MW; 110 GHz; 2 MW; 3 MW; 30 to 60 MHz; 6 MW; DIII-D Advanced Tokamak Program; DIII-D RF systems upgrade; ICRF systems; centrally localized current drive enhancement; ceramic insulated transmission line; current density profile; electron cyclotron heating; fast wave current drive; ion cyclotron range of frequency systems; off-axis current modification; water-cooled four-strap antenna; Ceramics; Current density; Cyclotrons; Insulation; Plasma density; Plasma waves; Power system transients; Radio frequency; Tokamaks; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering, 1995. SOFE '95. Seeking a New Energy Era., 16th IEEE/NPSS Symposium

Conference_Location

Champaign, IL

Print_ISBN

0-7803-2969-4

Type

conf

DOI

10.1109/FUSION.1995.535957

Filename

535957