Publication Type
Conference Paper
Book Title
Radio Frequency Power in Plasmas
Publication Date
Page Numbers
305 to 308
Volume
1187
Publisher Location
Melville, New York, United States of America
Conference Name
18th Topical Conference on Radio Frequency Power in Plasmas
Conference Location
Ghent, Belgium
Conference Sponsor
Spinner GmbH; ITER Belgium; SCK CEN; Taylor & Francis Grp; Thomson Broadcast & Multimedia; Univ Gent
Conference Date
-
Abstract
A goal in the 5-year plan for the fast wave program on DIII-D is to couple a total of 3.6 MW of RF power into a long pulse, H-mode plasma for central electron heating. The present short-pulse 285/300 antenna array would need to be replaced with one capable of at least 1.2 MW, 10 s operation at 60 MHz into an H-mode (low resistive loading) plasma condition. The primary design under consideration uses a poloidally-segmented strap (3 sections) for reduced strap voltage near the plasma/Faraday screen region. Internal capacitance makes the antenna structure self-resonant at 60 MHz, strongly reducing peak E-fields in the vacuum coax and feed throughs.
