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Title: Island-induced bootstrap current on the saturation of a thin magnetic island in tokamaks

Abstract

It is shown that island-induced bootstrap current density, which results from the symmetry breaking of the vertical bar B vertical bar when an island is embedded in the equilibrium magnetic field B, modifies the evolution equation and the saturation level for a thin magnetic island in tokamaks. This modification is independent of the fraction of the equilibrium bootstrap current density. It is found that island-induced bootstrap current density increases the saturation level for modes with positive values of {delta}{sup '}. Here, {delta}{sup '} is the stability parameter for the linear tearing modes.

Authors:
 [1]
  1. Engineering Physics Department, University of Wisconsin, Madison, Wisconsin 53706 (United States)
Publication Date:
OSTI Identifier:
20974936
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 14; Journal Issue: 4; Other Information: DOI: 10.1063/1.2730500; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BOOTSTRAP CURRENT; EQUILIBRIUM; ISLANDS; MAGNETIC FIELDS; MAGNETIC ISLANDS; MAGNETOHYDRODYNAMICS; PLASMA; PLASMA CONFINEMENT; TEARING INSTABILITY; TOKAMAK DEVICES

Citation Formats

Shaing, K. C. Island-induced bootstrap current on the saturation of a thin magnetic island in tokamaks. United States: N. p., 2007. Web. doi:10.1063/1.2730500.
Shaing, K. C. Island-induced bootstrap current on the saturation of a thin magnetic island in tokamaks. United States. doi:10.1063/1.2730500.
Shaing, K. C. Sun . "Island-induced bootstrap current on the saturation of a thin magnetic island in tokamaks". United States. doi:10.1063/1.2730500.
@article{osti_20974936,
title = {Island-induced bootstrap current on the saturation of a thin magnetic island in tokamaks},
author = {Shaing, K. C.},
abstractNote = {It is shown that island-induced bootstrap current density, which results from the symmetry breaking of the vertical bar B vertical bar when an island is embedded in the equilibrium magnetic field B, modifies the evolution equation and the saturation level for a thin magnetic island in tokamaks. This modification is independent of the fraction of the equilibrium bootstrap current density. It is found that island-induced bootstrap current density increases the saturation level for modes with positive values of {delta}{sup '}. Here, {delta}{sup '} is the stability parameter for the linear tearing modes.},
doi = {10.1063/1.2730500},
journal = {Physics of Plasmas},
number = 4,
volume = 14,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2007},
month = {Sun Apr 15 00:00:00 EDT 2007}
}