Current drive by electron cyclotron waves in stellarators

Journal Article · Sat Oct 31 23:00:00 EST 1992 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.860376· OSTI ID:7027907

Castejon, F; Alejaldre, C; Coarasa, J A ^[1]

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1. Asociacion EURATOM / CIEMAT para la Fusion, Av. Complutense, 22. 28040, Madrid (Spain)

Electron cyclotron current drive studies in stellarators are justified for the potential the method holds in the control and compensation of unwanted, pressure-induced, plasma currents, as it has been shown experimentally in Wendelstain VII-AS stellarator (Fusion Technol. {bold 17}, 62 (1990)). In this paper, a method is described to estimate induced currents by electron cyclotron waves that is computationally fast enough to be included in a ray-tracing code, but is able to account for the complicated stellarator geometry. In particular, the modification of the current drive efficiency due to trapped particles effects is included in the calculation. A close-to-Maxwellian electron distribution function and a nearly linear regime are assumed. An application of the method to the magnetic configuration of the TJ-II stellarator under construction in Madrid (Fusion Technol. {bold 17}, 131 (1990)) is also presented.

• OSTI ID: 7027907
• Journal Information: Physics of Fluids B; (United States), Journal Name: Physics of Fluids B; (United States) Vol. 4:11; ISSN 0899-8221; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700330 -- Plasma Kinetics
Transport
& Impurities-- (1992-)
700350* -- Plasma Production
Heating
Current Drive
& Interactions-- (1992-)
CLOSED PLASMA DEVICES
CURRENT-DRIVE HEATING
CYCLOTRON RESONANCE
DISTRIBUTION FUNCTIONS
ELECTRIC HEATING
ELECTROMAGNETIC RADIATION
ELECTRON CYCLOTRON-RESONANCE
FUNCTIONS
HEATING
JOULE HEATING
MICROWAVE RADIATION
PLASMA HEATING
RADIATIONS
RESISTANCE HEATING
RESONANCE
STELLARATORS
THERMONUCLEAR DEVICES
TRAPPING