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Abstract

Plasma currents up to 200 kA have been sustained in the iron core transformer Petula-B tokamak by lower hybrid waves at 1.25 GHz. This proved to be feasible even at q(a) about 2. For a density delta n-e = 1. x 10**13 cm**-3, 100 kW of RF power is sufficient to drive 150 kAmps without the help of ohmic current. This efficiency has a 1/delta n-e dependence up to delta n-e approximately equal to 2x10**13 cm**-3. The RF current, as inferred from the loop voltage drop, versus power dependence shows a saturation which can be explained by strong magnetic coupling to the primary winding and by the inclusion of the plasma resistivity decrease during the RF current drive.

Additional information

Authors: VAN HOUTTE D, CEA, FONTENAY-AUX-ROSES (FRANCE);BRIAND P, CEA, FONTENAY-AUX-ROSES (FRANCE);BRIFFOD G, CEA, FONTENAY-AUX-ROSES (FRANCE);CLEMENT M, CEA, FONTENAY-AUX-ROSES (FRANCE);GORMEZANO C, CEA, FONTENAY-AUX-ROSES (FRANCE);HESS W, CEA, FONTENAY-AUX-ROSES (FRANCE);HOW J, CEA, FONTENAY-AUX-ROSES (FRANCE);ICHTCHENKO G, CEA, FONTENAY-AUX-ROSES (FRANCE);MELIN G CEA, FONTENAY-AUX-ROSES (FRANCE), CEA, FONTENAY-AUX-ROSES (FRANCE)
Bibliographic Reference: WRITE TO CEA MENTIONING REPORT EUR-CEA-FC 1218 EN 1984
Availability: Can be ordered online
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