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Numerical computation of magnetic fields of two- and three- dimensional equilibria with net toroidal current

MPS-Authors
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Strumberger,  E.
Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society;
Relativistic Plasmas, Max Planck Institute for Plasma Physics, Max Planck Society;

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Günter,  S.
Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society;

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Merkel,  P.
Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society;

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Schwarz,  E.
Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society;

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Tichmann,  C.
Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society;

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Zehrfeld,  H.-P.
Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society;

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Citation

Strumberger, E., Günter, S., Merkel, P., Schwarz, E., Tichmann, C., & Zehrfeld, H.-P. (2002). Numerical computation of magnetic fields of two- and three- dimensional equilibria with net toroidal current. Nuclear Fusion, 42(7), 827-832.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0027-42CE-E
Abstract
The MFBE-2001 code computes the magnetic field in a form suitable for field line tracing inside and outside the plasma boundary of two- and three-dimensional finite-beta equilibria. It is a modified version of the Magnetic Field Solver for Finite-beta Equilibria (MFBE) code which was developed for the investigation of stellarator equilibria without net toroidal current. The numerical method used in MFBE-2001 is based on the 'virtual casing' principle which also allows the computation of magnetic fields of equilibria with net toroidal current, such as quasi-axisymmetric and tokamak equilibria. The numerical accuracy of the code is tested for an axisymmetric tokamak- equilibrium and the corresponding three-dimensional one including the toroidal field ripple. For this purpose, the results obtained with the code system VMEC/NEMEC+MFBE_2001+GOURDON are compared with those computed with the axisymmetric equilibrium code DIVA.