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Title: Coil current and vacuum magnetic flux calculation for axisymmetric equilibria

Abstract

In fixed-boundary axisymmetric equilibrium calculations the plasma shape is assigned from input. In several circumstances, the plasma shape may not be known a priori, or one may desire to also compute the magnetic field in the volume surrounding the plasma through the calculation of a free-boundary equilibrium. This requires either the coil currents or the magnetic poloidal flux on a curve in the vacuum region to be assigned as input for the free-boundary equilibrium calculation. The FREE-FIX code presented in this article is a general tool for calculating coil currents being given a fixed-boundary calculation. Finally, a new formulation is presented, which considerably reduces the computational cost of the calculation. FREE-FIX performs well for different geometries and experiments.

Authors:
ORCiD logo [1]
  1. Auburn Univ., AL (United States)
Publication Date:
Research Org.:
Auburn Univ., AL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1594951
Grant/Contract Number:  
SC0014196; FG02-93ER54215; S013799-F
Resource Type:
Accepted Manuscript
Journal Name:
Plasma Physics and Controlled Fusion
Additional Journal Information:
Journal Volume: 59; Journal Issue: 12; Journal ID: ISSN 0741-3335
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Guazzotto, L. Coil current and vacuum magnetic flux calculation for axisymmetric equilibria. United States: N. p., 2017. Web. https://doi.org/10.1088/1361-6587/aa8be4.
Guazzotto, L. Coil current and vacuum magnetic flux calculation for axisymmetric equilibria. United States. https://doi.org/10.1088/1361-6587/aa8be4
Guazzotto, L. Thu . "Coil current and vacuum magnetic flux calculation for axisymmetric equilibria". United States. https://doi.org/10.1088/1361-6587/aa8be4. https://www.osti.gov/servlets/purl/1594951.
@article{osti_1594951,
title = {Coil current and vacuum magnetic flux calculation for axisymmetric equilibria},
author = {Guazzotto, L.},
abstractNote = {In fixed-boundary axisymmetric equilibrium calculations the plasma shape is assigned from input. In several circumstances, the plasma shape may not be known a priori, or one may desire to also compute the magnetic field in the volume surrounding the plasma through the calculation of a free-boundary equilibrium. This requires either the coil currents or the magnetic poloidal flux on a curve in the vacuum region to be assigned as input for the free-boundary equilibrium calculation. The FREE-FIX code presented in this article is a general tool for calculating coil currents being given a fixed-boundary calculation. Finally, a new formulation is presented, which considerably reduces the computational cost of the calculation. FREE-FIX performs well for different geometries and experiments.},
doi = {10.1088/1361-6587/aa8be4},
journal = {Plasma Physics and Controlled Fusion},
number = 12,
volume = 59,
place = {United States},
year = {2017},
month = {10}
}

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    Numerical simulations of global Alfvén eigenmodes excitation and stabilization in NSTX-U
    journal, September 2019

    • Belova, E. V.; Fredrickson, E. D.; Lestz, J. B.
    • Physics of Plasmas, Vol. 26, Issue 9
    • DOI: 10.1063/1.5116357