Analysis of IBW experiments on TFTR

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

DOI:https://doi.org/10.1063/1.53396· OSTI ID:570267

LeBlanc, B P; Bell, R E ^[1]; Bush, C E ^[2]; Cesario, R ^[3]; Hanson, G R ^[2]; Hosea, J; Majeski, R; Ono, M ^[1]; Paoletti, F ^[4]; Phillips, C K; Rogers, J H; Schilling, G; Wilson, J R ^[1]

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1. Princeton Plasma Physics Laboratory, Princeton University, New Jersey (United States)
2. Oak Ridge National Laboratory, Oak Ridge, Tennessee (United States)
3. C.R.E., Association EUR-ENEA, Frascati (Italy)
4. Department of Applied Physics, Columbia University, New York (United States)

A direct launch IBW antenna has been commissioned during the last TFTR experimental campaign. While we did observed IBW-induced poloidal drive, we did not reproduce the CH mode. In this first cut analysis, we concentrate on discharges with hydrogenic resonant species (D or T) combining IBW and neutral beam heating (NBI) at 76 MHz. The experimental data suggest poor power coupling to the main plasma as a limiting factor. A ray tracing code computes the power deposition and results are fed in data reduction code TRANSP to ascertain the coupling efficiency. The density increase observed during IBW is in part caused by influx of impurity, in particular during the latter part of the RF pulse. {copyright} {ital 1997 American Institute of Physics.}

• Research Organization: Princeton Plasma Physics Laboratory
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 570267
• 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
ANTENNAS
BERNSTEIN MODE
MHZ RANGE 01-100
NEUTRAL ATOM BEAM INJECTION
PLASMA DENSITY
PLASMA HEATING
TFTR TOKAMAK