Design Concepts For A Long Pulse Upgrade For The DIII-D Fast Wave Antenna Array

Conference · Thu Jan 01 00:00:00 EST 2009

OSTI ID:1022693

Ryan, Philip Michael ^[1]; Baity, Jr, F Wallace ^[1]; Caughman, John B ^[1]; Goulding, Richard Howell ^[1]; Hosea, J. ^[2]; Greenough, Nevell ^[2]; Nagy, Alex ^[2]; Pinsker, R. ^[3]; Rasmussen, David A ^[1]

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1. ORNL
2. Princeton Plasma Physics Laboratory (PPPL)
3. General Atomics

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.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1022693
• Resource Relation: Conference: 18th Topical Conference on Radio Frequency Power in Plasmas, Ghent, Belgium, 20090624, 20090626
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANTENNAS
CAPACITANCE
DESIGN
DOUBLET-3 DEVICE
ELECTRONS
HEATING
PLASMA
SCREENS