Simulation of EAST off-axis neutral beam heating and current drive

Chen, Zhongjing
Fan, Tieshuan
Zhang, Cheng
Hu, Chundong
Wang, Xiaogang

Open link

Publication date

January 2012

DOI

10.1016/j.fusengdes.2012.01.046

Publisher

fusion engineering and design

ISSN

0920-3796

Journal

issn:0920-3796

Citation count (estimate)

Abstract

The capability of off-axis neutral beam heating and current drive has been investigated with NUBEAM for Experimental Advanced Superconducting Tokamak (EAST). Three different approaches to realize off-axis Neutral Beam Injection (NBI) have been studied. Simulation results for on- and off-axis NBI are reported. The effects of the alignment of NBI relative to the magnetic field pitch on off-axis neutral beam heating and current drive are observed and discussed qualitatively. By comparing the numerical results, a most favorable off-axis NBI configuration is recommended. The capability to control sawtooth is also investigated by comparing locations of the q = 1 rational surface and the peak of the fast ion density profile. (C) 2012 Elsevier B.V....