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Journal of Plasma Physics
Article . 2025 . Peer-reviewed
License: CC BY
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Article . 2025
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Plasma pressure response to non-inductive current drive in axisymmetric visco-resistive magnetohydrodynamic steady states

Authors: Anna Krupka; Marie-Christine Firpo;

Plasma pressure response to non-inductive current drive in axisymmetric visco-resistive magnetohydrodynamic steady states

Abstract

We investigate self-consistent, steady-state axisymmetric solutions of an incompressible tokamak plasma using a visco-resistive magnetohydrodynamic model. A key contribution of this work is the formulation of Poisson’s equation that governs the pressure profile. Our analysis reveals that the current modelling fails to produce realistic pressure levels. To overcome this limitation, we introduce additional non-inductive current drives, akin to those generated by neutral beam injection or radio frequency heating, modelled as modifications to the toroidal current. Numerical simulations validate our enhanced model, showing significant improvements in pressure profile characteristics. In the cases examined, the effect of these current drives on the velocity profiles is moderate, except when the non-inductive current drives induce reversals in the total toroidal current density, leading to non-nested flux surfaces with internal separatrices.

Country
Belgium
Keywords

Science & Technology, plasma simulation, EQUILIBRIA, MHD, Physics, Fluids & Plasmas, fusion plasma, plasma flows, Physics, Fluids & Plasmas, TOROIDAL FLOWS, HARTMANN, Physical Sciences, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, OPERATION, 5106 Nuclear and plasma physics, 0206 Quantum Physics

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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Average
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