Major results of the electron cyclotron heating experiment in the PDX tokamak

Conference · Sun Jul 01 04:00:00 EDT 1984

OSTI ID:6536608

Hsuan, H; Bol, K; Bowen, N; Boyd, D; Cavallo, A; Dimits, A; Doane, J; Elder, G; Goldman, M; Grek, B

Electron Cyclotron Heating (ECH) experiments on PDX have been carried out with two 60 GHz pulsed gyrotrons each yielding up to approximately 100 kW. The ECH system used two waveguide runs each about 30 meters long. One run included 5 bends and the other, 7 bends. Predetermined waveguide modes were transmitted. The electron cyclotron waves were launched in narrow beams from both the high field and the low field sides of the plasma torus. The major new physics results are: (1) efficient central electron heating for both ohmic and neutral beam heated target plasmas; (2) alteration of MHD behavior using ECH; (3) identification of the trapped electron population with ECH; and (4) signature of velocity-space time evolution during ECH. In the best heating results obtained, Thomson scattering data indicated a central temperature increase from less than or equal to 1.5 keV to greater than or equal to 2.5 keV. This occurred with an average density of about 10/sup 13/ cm/sup -3/ and approximately 80 kW outside-launch ordinary-mode heating.

• Research Organization: Princeton Univ., NJ (USA). Plasma Physics Lab.; Maryland Univ., College Park (USA); AT and T, Inc., Princeton, NJ (USA); Hunter Coll., New York (USA). Dept. of Physics; FOM-Instituut voor Plasmafysica, Rijnhuizen (Netherlands)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6536608
• Report Number(s): PPPL-2114; CONF-840311-15; ON: DE84017066
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
AMPLIFIERS
CLOSED PLASMA DEVICES
ECR HEATING
EFFICIENCY
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUID MECHANICS
HEATING
HIGH-FREQUENCY HEATING
HYDRODYNAMICS
INELASTIC SCATTERING
MAGNETOHYDRODYNAMICS
MECHANICS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
PDX DEVICES
PLASMA HEATING
SCATTERING
THERMONUCLEAR DEVICES
THOMSON SCATTERING
TOKAMAK DEVICES
WAVEGUIDES