Magnetic Fluctuations During Plasma Current Rise of Divertor Discharge in JT-60

摘要

During a current rise phase in the JT-60 divertor discharge, a series of magnetic fluctuations which do not rotate poloidally (phase-locking) is observed. They cause a cooling of plasma periphery and an enhancement of H/sub alpha / emission in the divertor chamber. A significant increase in beta /sub P/ + 1/sub i//2 with minor disruptions during the phase-locked magnetic fluctuation suggests a relaxation of the current profile in the current rise phase of the divertor discharge. (Atomindex citation 18:007217)