EFFECT OF RF HEATING ON EDGE PARAMETERS IN THE TCA TOKAMAK
Detailed scrape-off measurements during Alfven wave heating experiments (P-RF +- 200 kW) in TCA are presented. The measurements are performed by means of electrical probes and by deposition probes fixed onto the antennae. It is shown that different antenna designs strongly influence the behaviour of the boundary plasma. Even during low power RF heating experiments it is found that the plasma - antenna interaction leads to a non-Maxwellian plasma. Low frequency density fluctuations are associated with gradient changes of the density and temperature profiles also during RF. High frequency fluctuations at the driving frequency and their harmonics are observed.
Bibliographic Reference: 6TH INTERNATIONAL CONFERENCE ON PLASMA SURFACE INTERACTIONS IN CONTROLLED FUSION DEVICES, NAGOY (JAPAN), MAY 14-18, 1984 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31536 ORA
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Record Number: 1989122075500 / Last updated on: 1987-01-01
Available languages: en