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Abstract

THE PROPERTIES OF THE RADIATION EMITTED BY THE SPECIFIC NON-MAXWELLIAN SYSTEM ARE STUDIED. NON-MAXWELLIAN ELECTRON DISTRIBUTION FUNCTIONS ARE PRODUCED IN TOKAMAKS DURING ELECTRON CYCLOTRON HEATING. THE ELECTRON DISTRIBUTION IS DETERMINED BY SOLVING THE TIME-DEPENDENT BOUNCE-AVERAGE QUASILINEAR/FOKKER-PLANCK CODE. THE COMPUTED STEADY-STATE DISTRIBUTION FUNCTION IS USED TO CALCULATE THE EMISSION AND TRANSMISSION SPECTRA FOR DIFFERENT LOCATIONS OF THE RECEIVING ANTENNAS, POLARISATIONS AND HARMONICS. A DETAILED ANALYSIS OF THOSE SPECTRA YIELDS INSIGHT INTO PROBLEMS LIKE THE IMPACT OF QUASILINEAR FLATTENING AND ELECTRON TRAPPING IN THE FORM OF THE STEADY-STATE DISTRIBUTION, WHICH RELATES TO EC HEATING AND CURRENT DRIVE IN TOKAMAK REACTORS. TYPICAL EXAMPLES OF T-10 EC HEATING EXPERIMENTS ARE DISCUSSED. THE IMPACT OF TOROIDAL EFFECTS ON THE GENERATION OF SUPERTHERMAL ELECTRON BY EC-WAVE ABSORPTION IS DEMONSTRATED. THE EFFECT IS SO LARGE THAT IT CAN BE DETECTED AT LOW WAVE POWER (0.5 MW). LOWER-POWER EXPERIMENTS IN SMALLER TOKAMAKS APPEAR TO BE SUITABLE FOR INVESTIGATING TOROIDAL EFFECTS ON THE WAVE-ELECTRON INTERACTION PROCESS AND TRAPPED ELECTRON DYNAMICS.

Additional information

Authors: GIRUZZI G FOM-INSTITUUT VOOR PLASMAFYSICA "RIJNHUIZEN", NIEUWEGEIN, NL, FOM-INSTITUUT VOOR PLASMAFYSICA "RIJNHUIZEN", NIEUWEGEIN, NL
Bibliographic Reference: PAPER PRESENTED: 15TH EUROPEAN CONFERENCE ON CONTROLLED FUSION AND PLASMA HEATING, DUBROVNIK/YU, MAY 16-20, 1988, AVAILABILITY: CEC-LUXEMBOURG, DG XIII/A2, BP 1907, MENTIONING PAPER ORA 33956 E
Availability: Can be ordered online
Record Number: 1989126228800 / Last updated on: 1989-04-01
Category: PUBLICATION
Available languages: en