The effect of collisional dissipation on the radial profiles of current driven by the lower-hybrid waves

Dehui Li; Guangli Kuang; Shaojie Wang
June 2008
Physics of Plasmas;Jun2008, Vol. 15 Issue 6, p062504
Academic Journal
A simulation of the collisional dissipation of fast electrons has been conducted in lower-hybrid-current drive (LHCD) tokamak plasmas. The simulation results show that the dissipation of fast electrons will counteract the effect of radial diffusion to some extent, thereby making the LHCD current profile closer to the power deposition profile. It seems that the dissipation is helpful to maintain a steady state “hole current profile” in LHCD plasmas; thereby, the desired reversed magnetic shear should be maintained.


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