Coil current and vacuum magnetic flux calculation for axisymmetric equilibria

Journal Article · 12 October 2017 · Plasma Physics and Controlled Fusion

DOI: https://doi.org/10.1088/1361-6587/aa8be4 · OSTI ID:1594951

Guazzotto, L.  ^[1]

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1. Auburn Univ., AL (United States)

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.

• Research Organization: Auburn Univ., AL (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: SC0014196; FG02-93ER54215; S013799-F
• OSTI ID: 1594951
• Journal Information: Plasma Physics and Controlled Fusion, Vol. 59, Issue 12; ISSN 0741-3335
• Publisher: IOP ScienceCopyright Statement
• Country of Publication: United States
• Language: English