Observation of a strong correlation between the positive floating potential near the edge and plasma current on EXL-50 ECW plasma

Mingyuan Wang, Dong Guo, Xin Zhao +12

Fully non-inductive plasma current start-up without the central solenoid in ECW plasma was used on EXL-50 Spherical Torus with a weak external vertical field (Bv). Generally, the n…