IMPURITY GENERATION AND EDGE PLASMA EFFECTS DURING IHR EXPERIMENTS IN THE PETULA-B TOKAMAK
The plasma in the scrape-off layer and the behaviour of impurities during application of LH waves have been studied in PETULA. In the current drive regime a decrease of impurities is observed during and after the R.F. pulse, which is due to a strong modification of the electron temperature profile and of the edge density. In the ion heating regime, sputtering from fast unconfined ions creates continuous flux of heavy impurities, which increases dramatically radiative losses.
Bibliographic Reference: 4TH INTERNATIONAL SYMPOSIUM ON HEATING IN TOROIDAL PLASMAS, ROMA (ITALY), MARCH 21-28, 1984 VOL. I, PP. 634 - 640 1478 P., VOL. I AND VOL. II, 1984 WRITE TO MONOTYPIA FRANCHI, ST. LUCIA - VIALE UMBRIA NO. 28, 06012 CITTA DI CASTELLO, PERUGIA (ITALY), PRIC
Record Number: 1989124035200 / Last updated on: 1987-01-01
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