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Title: Flux tube train model for local turbulence simulation of toroidal plasmas

Abstract

A new simulation method for local turbulence in toroidal plasmas is developed by extending the conventional idea of the flux tube model. In the new approach, a train of flux tubes is employed, where flux tube simulation boxes are serially connected at each end along a field line so as to preserve a symmetry of the local gyrokinetic equations for image modes in an axisymmetric torus. Validity of the flux tube train model is confirmed against the toroidal ion temperature gradient turbulence for a case with a long parallel correlation of fluctuations, demonstrating numerical advantages over the conventional method in the time step size and the symmetry-preserving property.

Authors:
 [1]; ; ;  [2]
  1. Department of Physics, Nagoya University, Nagoya 464-8602 (Japan)
  2. National Institute for Fusion Science, Toki, Gifu 509-5292 (Japan)
Publication Date:
OSTI Identifier:
22408102
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 2; Other Information: (c) 2015 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; AXIAL SYMMETRY; COHERENT TUBE MODEL; CORRELATIONS; FLUCTUATIONS; ION TEMPERATURE; PLASMA; SIMULATION; TEMPERATURE GRADIENTS; TOROIDAL CONFIGURATION; TURBULENCE

Citation Formats

Watanabe, T. -H., Sugama, H., Ishizawa, A., and Nunami, M. Flux tube train model for local turbulence simulation of toroidal plasmas. United States: N. p., 2015. Web. doi:10.1063/1.4907793.
Watanabe, T. -H., Sugama, H., Ishizawa, A., & Nunami, M. Flux tube train model for local turbulence simulation of toroidal plasmas. United States. https://doi.org/10.1063/1.4907793
Watanabe, T. -H., Sugama, H., Ishizawa, A., and Nunami, M. 2015. "Flux tube train model for local turbulence simulation of toroidal plasmas". United States. https://doi.org/10.1063/1.4907793.
@article{osti_22408102,
title = {Flux tube train model for local turbulence simulation of toroidal plasmas},
author = {Watanabe, T. -H. and Sugama, H. and Ishizawa, A. and Nunami, M.},
abstractNote = {A new simulation method for local turbulence in toroidal plasmas is developed by extending the conventional idea of the flux tube model. In the new approach, a train of flux tubes is employed, where flux tube simulation boxes are serially connected at each end along a field line so as to preserve a symmetry of the local gyrokinetic equations for image modes in an axisymmetric torus. Validity of the flux tube train model is confirmed against the toroidal ion temperature gradient turbulence for a case with a long parallel correlation of fluctuations, demonstrating numerical advantages over the conventional method in the time step size and the symmetry-preserving property.},
doi = {10.1063/1.4907793},
url = {https://www.osti.gov/biblio/22408102}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 2,
volume = 22,
place = {United States},
year = {Sun Feb 15 00:00:00 EST 2015},
month = {Sun Feb 15 00:00:00 EST 2015}
}