skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effects of magnetic islands on drift wave instability

Abstract

Magnetic islands have been implemented in the gyrokinetic toroidal code to study the effects of the islands on microturbulence. The pressure profile flattening is verified in the simulation with the islands. Simulations of ion temperature gradient instability find that different toroidal modes are linearly coupled together and that toroidal spectra become broader when the island width increases. The real frequencies and growth rates of different toroidal modes approach each other with the averaged value independent of the island width. The linear mode structures are enhanced at the island separatrices and weakened at the island centers, consistent with the flattening of the pressure profile inside the islands.

Authors:
 [1];  [2]
  1. Department of Physics and Astronomy, University of California, Irvine, California 92697 (United States)
  2. Fusion Simulation Center and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)
Publication Date:
OSTI Identifier:
22403358
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 21; Journal Issue: 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; INSTABILITY; MAGNETIC ISLANDS; SIMULATION; TEMPERATURE GRADIENTS; WAVE PROPAGATION

Citation Formats

Jiang, P., E-mail: jiangp@pku.edu.cn, Department of Physics and Astronomy, University of California, Irvine, California 92697, Lin, Z., E-mail: zhihongl@uci.edu, Holod, I., and Xiao, C. Effects of magnetic islands on drift wave instability. United States: N. p., 2014. Web. doi:10.1063/1.4903910.
Jiang, P., E-mail: jiangp@pku.edu.cn, Department of Physics and Astronomy, University of California, Irvine, California 92697, Lin, Z., E-mail: zhihongl@uci.edu, Holod, I., & Xiao, C. Effects of magnetic islands on drift wave instability. United States. https://doi.org/10.1063/1.4903910
Jiang, P., E-mail: jiangp@pku.edu.cn, Department of Physics and Astronomy, University of California, Irvine, California 92697, Lin, Z., E-mail: zhihongl@uci.edu, Holod, I., and Xiao, C. 2014. "Effects of magnetic islands on drift wave instability". United States. https://doi.org/10.1063/1.4903910.
@article{osti_22403358,
title = {Effects of magnetic islands on drift wave instability},
author = {Jiang, P., E-mail: jiangp@pku.edu.cn and Department of Physics and Astronomy, University of California, Irvine, California 92697 and Lin, Z., E-mail: zhihongl@uci.edu and Holod, I. and Xiao, C.},
abstractNote = {Magnetic islands have been implemented in the gyrokinetic toroidal code to study the effects of the islands on microturbulence. The pressure profile flattening is verified in the simulation with the islands. Simulations of ion temperature gradient instability find that different toroidal modes are linearly coupled together and that toroidal spectra become broader when the island width increases. The real frequencies and growth rates of different toroidal modes approach each other with the averaged value independent of the island width. The linear mode structures are enhanced at the island separatrices and weakened at the island centers, consistent with the flattening of the pressure profile inside the islands.},
doi = {10.1063/1.4903910},
url = {https://www.osti.gov/biblio/22403358}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 12,
volume = 21,
place = {United States},
year = {Mon Dec 15 00:00:00 EST 2014},
month = {Mon Dec 15 00:00:00 EST 2014}
}

Works referenced in this record:

Turbulence spreading and transport scaling in global gyrokinetic particle simulations
journal, March 2004


Electromagnetic formulation of global gyrokinetic particle simulation in toroidal geometry
journal, December 2009


The nonlinear coupling between gyroradius scale turbulence and mesoscale magnetic islands in fusion plasmas
journal, September 2010


Small-scale dynamo action in multi-scale magnetohydrodynamic and micro-turbulence
journal, March 2012


Hamiltonian guiding center drift orbit calculation for plasmas of arbitrary cross section
journal, January 1984


Island bootstrap current modification of the nonlinear dynamics of the tearing mode
journal, January 1986


Chapter 3: MHD stability, operational limits and disruptions
journal, June 2007


RMP ELM suppression in DIII-D plasmas with ITER similar shapes and collisionalities
journal, January 2008


Behaviour of turbulent transport in the vicinity of a magnetic island
journal, May 2009


The influence of magnetic islands on drift mode stability in magnetized plasma
journal, October 2009


Gyrokinetic and gyrofluid investigation of magnetic islands in tokamaks
journal, November 2010


Interaction of turbulence with magnetic islands: effect on bootstrap current
journal, April 2011


Verification of Gyrokinetic Particle Simulation of Device Size Scaling of Turbulent Transport
journal, December 2012


Transport of Energetic Particles by Microturbulence in Magnetized Plasmas
journal, August 2008


Turbulent Transport of Trapped-Electron Modes in Collisionless Plasmas
journal, August 2009


Nonlinear Frequency Oscillation of Alfvén Eigenmodes in Fusion Plasmas
journal, July 2012


Radial Localization of Toroidicity-Induced Alfvén Eigenmodes
journal, October 2013


Observation of Nonlinear Neoclassical Pressure-Gradient–Driven Tearing Modes in TFTR
journal, June 1995


Neoclassical Transport in Enhanced Confinement Toroidal Plasmas
journal, January 1997


Wave-Particle Decorrelation and Transport of Anisotropic Turbulence in Collisionless Plasmas
journal, December 2007


Works referencing / citing this record:

Loss of bootstrap current in vicinity of magnetic islands
journal, May 2019


Effects of magnetic islands on bootstrap current in toroidal plasmas
journal, December 2016


Gyrokinetic simulations of nonlinear interactions between magnetic islands and microturbulence
journal, September 2019