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Abstract

A program of experimental and theoretical effort at Culham has been directed at the verification of the theory of ECRH driven current produced by the mechanism of asymetric plasma resistivity. Experiments on the superconducting Levitron device have established experimentally the existence of such a current and demonstrate that its amplitude and scaling are close to the theoretical predictions. Further experiments have been performed on the TOSCA experiment at high power with a directional antenna. The data from these experiments show a variation in plasma resistivity which is consistent with a unidirectional toroidal current driven by the wave. The variation of this current with resonance position demonstrates how the toroidal current is inhibited by the presence of a trapped electron population. Further experiments are planned both on TOSCA and on the CLEO experiment, where higher single pass absorption and the freedom to operate in an otherwise current free stellarator mode will facilitate interpretation.

Additional information

Authors: EDLINGTON T CULHAM LABORATORY, ABINGDON, OXON (UK), CULHAM LABORATORY, ABINGDON, OXON (UK)
Bibliographic Reference: NON-INDUCTIVE CURRENT DRIVE IN TOKAMAKS - IAEA TECHNICAL COMMITTEE MEETING, CULHAM LABORATORY (UK), APRIL 18-21, 1983 VOL. II, PP. 514-520 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31919 ORA
Availability: Can be ordered online
Record Number: 1989123047400 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en