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research article

Computation of multi-region, relaxed magnetohydrodynamic equilibria with prescribed toroidal current profile

Baillod, A.  
•
Loizu, J.  
•
Qu, Z.S.
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July 12, 2021
Journal of Plasma Physics

The stepped-pressure equilibrium code (SPEC) (Hudson et al., Phys. Plasmas, vol. 19, issue 11, 2012, 112502) is extended to allow the computation of multi-region, relaxed magnetohydrodynamics (MRxMHD) equilibria at prescribed toroidal current profile. Toroidal currents are expressed in the framework of the MRxMHD theory, exhibiting spatial separation between pressure driven and externally driven currents. Additionally, analytical force balance derivatives at constant toroidal current are deployed in order to maintain SPEC's advantageous speed. The newly implemented capability is verified in screw pinch and classical stellarator geometries, and is applied to obtain the equilibrium β-limit of a classical stellarator without net toroidal currents. This new capability opens the possibility to study the effect of toroidal current on three-dimensional equilibria with the SPEC code.

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Type
research article
DOI
10.1017/S0022377821000520
Author(s)
Baillod, A.  
Loizu, J.  
Qu, Z.S.
Kumar, A.
Graves, J.P.  
Date Issued

2021-07-12

Publisher

Cambridge University Press

Published in
Journal of Plasma Physics
Volume

87

Issue

4

Article Number

905870403

Subjects

Plasma confinement

•

Fusion plasma

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SPC  
Available on Infoscience
July 12, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/179862
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