Minority ICRF current drive in toroidal devices
To determine the plasma parameters that are necessary to produce an asymmetric k parallel spectrum required for asymmetric heating, we consider antennae coupling in a slab geometry. The antennae are treated as current filaments infinite in the y-(poloidal) direction and backed by a perfect conducting sheet. The density gradient is taken to be in the x-direction and we consider coupling only to the fast waves. The wave equation is solved using an outgoing wave condition for large x. We show the k/sub z/ spectrum for four antennae phased at theta = ..pi../2 for two different thicknesses of the low density region in front of the antenna. The asymmetry of the spectrum is quite sensitive to this thickness with a thicker low density region producing a more asymmetric spectrum.
- Research Organization:
- GA Technologies, Inc., San Diego, CA (USA)
- DOE Contract Number:
- AT03-76ET51011
- OSTI ID:
- 6334800
- Report Number(s):
- GA-A-17087; CONF-830452-1; ON: DE83010957
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
ABSORPTION
ANTENNAS
CLOSED PLASMA DEVICES
COUPLING
CURRENT-DRIVE HEATING
DISPERSION RELATIONS
ELECTRIC HEATING
ELECTRICAL EQUIPMENT
EQUIPMENT
HEATING
HIGH-FREQUENCY HEATING
HYBRID RESONANCE
ICR HEATING
JOULE HEATING
PLASMA HEATING
RESISTANCE HEATING
RESONANCE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES