Evidence for separatrix formation and sustainment with steady inductive helicity injection.
Phys Rev Lett
; 107(16): 165005, 2011 Oct 14.
Article
em En
| MEDLINE
| ID: mdl-22107397
ABSTRACT
The first sustainment of toroidal plasma current of 50 kA at up to 3 times the injected currents, added in quadrature, using steady inductive helicity injection is described. Separatrix currents-currents not linking the helicity injectors-are sustained up to 40 kA. Decreases in the n=1 toroidal mode of the poloidal magnetic field at higher current amplifications indicate more quiescent, direct toroidal current drive. Results are achieved in HIT-SI (with a spheromak of major radius 0.3 m) during deuterium operations immediately after helium operation. These results represent a breakthrough in the development of this new current drive method for magnetic confinement fusion.
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MEDLINE
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En
Ano de publicação:
2011
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Article