Mode conversion heating and current drive in TFTR

Journal Article · Tue Apr 01 04:00:00 EST 1997 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.53394· OSTI ID:587017

Majeski, R; Bell, M; Bell, R; Bernabei, S ^[1]; Bush, C ^[2]; Darrow, D; Hill, K; Hosea, J C; LeBlanc, B; Medley, S; Ono, M ^[1]; Petrov, M ^[3]; Phillips, C K; Rogers, J H; Schilling, G ^[1]; Scharer, J ^[4]; Smithe, D N ^[5]; Synakowski, E J; Taylor, G; Wilson, J R ; Zweben, S ^[1]

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1. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540 (United States)
2. Oak Ridge National Laboratory, Oak Ridge, Tennessee (United States)
3. Ioffe Institute, St. Petersburg (Russia)
4. University of Wisconsin, Madison, Wisconsin 53706 (United States)
5. Mission Research Corporation, Newington, Virginia 22122 (United States)

Two new four-strap fast wave antennas, driven by 8 MW of rf source power at 30 MHz, were installed for the final run period of TFTR. These antennas were utilized with D-T target plasmas to perform experiments in mode conversion heating. Poor mode conversion efficiency seen in D-T during the 1996 run (typically {approximately}20{percent} of the coupled rf power) is now believed to be due to ion cyclotron absorption by a small ({approximately}0.5{percent}) impurity of {sup 7}Li. This problem was remedied through the use of {sup 6}Li for wall conditioning. In contrast to the 1996 results, experiments performed with {sup 6}Li wall conditioning produced strong ion and electron heating in D-T plasmas. {copyright} {ital 1997 American Institute of Physics.}

• Research Organization: Princeton Plasma Physics Laboratory
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 587017
• Report Number(s): CONF-9704102--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 403; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
D-T REACTORS
ICR HEATING
LITHIUM ADDITIONS
MODE CONVERSION
RF SYSTEMS
TFTR TOKAMAK