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Title: Numerical study on the influence of electron cyclotron current drive on tearing mode

Controlling tearing modes by localized current drive is explored by using numerical simulation with a set of compressible magnetohydrodynamics equations. By examining the effects of different characteristics of driven current, such as density distribution, duration time, and deposition location, it is found that a driven current with larger magnitude and more focused deposition region shows a better suppression effect on the tearing modes. Meanwhile destabilizing effects are also observed when a driven current over a certain magnitude is applied continuously. In comparison with those on the X-point of the magnetic island, the results are better when the current deposition is targeted on the O-point. In addition, the timing control of the current deposition will be also addressed.
Authors:
; ; ;  [1] ;  [2]
  1. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)
  2. Department of Physics, Dalian Maritime University, Dalian 116026 (China)
Publication Date:
OSTI Identifier:
22299649
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; CONTROL; DEPOSITION; ECR CURRENT DRIVE; EQUATIONS; MAGNETIC ISLANDS; MAGNETOHYDRODYNAMICS; NUMERICAL ANALYSIS; TEARING INSTABILITY