Preliminary electron-cyclotron-heating results on Doublet III using an outside launch

Conference · Tue Mar 01 04:00:00 EST 1983

OSTI ID:6153629

Prater, R; Moeller, C P; Lin, S H

Electron-cyclotron-heating experiments have been carried out on the Doublet III tokamak. Two 60-GHz gyrotrons were used to generate about 255 kW of power delivered to the plasma in the ordinary-mode polarization. The antenna launches a 16/sup 0/ FWHM beam from the large major radius side (outside) of the plasma at a beam center angle of 12/sup 0/ from a major radius. Pulses up to 85 msec long were applied, with the fundamental resonance (21.4 kG) near the plasma center. Plasma current was 300 to 350 kA, and the configuration was mostly expanded boundary with an elongation of 1.4 to 1.6 and density of 2 to 3 x 10/sup 13/ cm/sup -3/. Electron-temperature increases up to 1 keV at the plasma center due to ECH are found by Thomson scattering and electron-cyclotron radiation at the second harmonic. Soft x-ray analysis also shows central electron heating and profile broadening when the resonance is moved outside of the plasma center.

• Research Organization: GA Technologies, Inc., San Diego, CA (USA)
• DOE Contract Number: AT03-76ET51011
• OSTI ID: 6153629
• Report Number(s): GA-A-17026; CONF-830210-12; ON: DE83010196
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101 -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
700205* -- Fusion Power Plant Technology-- Fuel
Heating
& Injection Systems
AMPLIFIERS
DOUBLET REACTORS
ECR HEATING
ELECTROMAGNETIC RADIATION
ELECTRON TEMPERATURE
ELECTRONIC EQUIPMENT
EQUIPMENT
HEATING
HIGH-FREQUENCY HEATING
INELASTIC SCATTERING
IONIZING RADIATIONS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
PLASMA DENSITY
PLASMA HEATING
RADIATIONS
SCATTERING
SOFT X RADIATION
SPECTRA
THERMONUCLEAR REACTORS
THOMSON SCATTERING
TOKAMAK TYPE REACTORS
X RADIATION
X-RAY SPECTRA