Derivation of dynamo current drive in a closed-current volume and stable current sustainment in the HIT-SI experiment

作者：Hossack A C^*; Sutherland D A; Jarboe T R

来源：Physics of Plasmas, 2017, 24(2): 020702.

DOI：10.1063/1.4975663

A derivation is given showing that the current inside a closed-current volume can be sustained against resistive dissipation by appropriately phased magnetic perturbations. Imposed-dynamo current drive theory is used to predict the toroidal current evolution in the helicity injected torus with steady inductive helicity injection (HIT-SI) experiment as a function of magnetic fluctuations at the edge. Analysis of magnetic fields from a HIT-SI discharge shows that the injector-imposed fluctuations are sufficient to sustain the measured toroidal current without instabilities whereas the small, plasma-generated magnetic fluctuations are not sufficiently large to sustain the current. Published by AIP Publishing.

• 出版日期2017-2