Effect of Lower Hybrid Wave Current Drive with High Component N‖ on EAST

Abstract

Abstract: In EAST tokamak high confinement mode discharge, a plasma current belt was found experimentally at the edge plasmas region. For EAST plasma with non-circular cross-section equilibrium configuration, effect of high parallel refractive index N_‖ component of lower hybrid wave on current drive was numerically studied. Results of the ray-tracing platform shows that kA plasma current emerges in a region of normalized radius from 0.7 to 1.0 for 6≤N_‖≤8. For electron temperature profile with pedestal and higher plasma edge temperature, the region of drive current is r/a>0.9.A theoretical analysis of lower hybrid Landau damping in EAST tokamak was also performed. Effects of electron density profile and formation of lower hybrid wave spectrum on current drive were discussed.

Key words: lower hybrid current drive, tokamak, plasma current

CLC Number:

O532

LIU Zuguang, LI Xinxia, YANG Ming. Effect of Lower Hybrid Wave Current Drive with High Component N_‖ on EAST[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2020, 37(4): 467-472.

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Effect of Lower Hybrid Wave Current Drive with High Component N_‖ on EAST

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