Observation of parametric decay waves during seond harmonic ICRF heating experiment in JT-60
Conference
·
· AIP Conference Proceedings (American Institute of Physics); (USA)
OSTI ID:6600195
- JT-60 Team Naka Fusion Research Eastablishment Japan Atomic Energy Research Institute, Naka-machi, Naka-gun, Ibaraki-ken, 311-01 (Japan)
Parametric decay waves were observed during second harmonic ICRF heating experiments in JT-60. The parametric decay process is probably that the pump wave decays into ion Bernstein waves (IBW) and ion cyclotron quasi-modes. Because the decay wave frequency at a toroidal magnetic field of 3.3--4.5 T agreed with the predicted frequency of IBW which was assumed to be excited parametrically near the ICRF antennas. The decay wave intensity decreased with increasing toroidal magnetic field. Increase in radiation loss induced by ICRF heating at the plasma current of 1 MA was not proportional to the pump wave power. Those results suggest that the parametric decay wave was one of the sources of the impurity production during the second harmonic ICRF heating experiments.
- OSTI ID:
- 6600195
- Report Number(s):
- CONF-8905120--
- Conference Information:
- Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Journal Volume: 190:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
ANNULAR SPACE
BERNSTEIN MODE
CLOSED CONFIGURATIONS
CONFIGURATION
DECAY INSTABILITY
HEATING
HIGH-FREQUENCY HEATING
ICR HEATING
IMPURITIES
INSTABILITY
JT-60 TOKAMAK
MAGNETIC FIELD CONFIGURATIONS
OSCILLATION MODES
PARAMETRIC INSTABILITIES
PLASMA HEATING
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
SPACE
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
TOROIDAL CONFIGURATION
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
ANNULAR SPACE
BERNSTEIN MODE
CLOSED CONFIGURATIONS
CONFIGURATION
DECAY INSTABILITY
HEATING
HIGH-FREQUENCY HEATING
ICR HEATING
IMPURITIES
INSTABILITY
JT-60 TOKAMAK
MAGNETIC FIELD CONFIGURATIONS
OSCILLATION MODES
PARAMETRIC INSTABILITIES
PLASMA HEATING
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
SPACE
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
TOROIDAL CONFIGURATION