Nonlinear second order electromagnetic gyrokinetic theory for a tokamak plasma

Dudkovskaia, A. V.; Wilson, H. R.; Connor, J. W.; Dickinson, D.; Parra, F. I.

doi:10.1088/1361-6587/acb173

Title: Nonlinear second order electromagnetic gyrokinetic theory for a tokamak plasma

Journal Article · Fri Mar 03 00:00:00 EST 2023 · Plasma Physics and Controlled Fusion

DOI:https://doi.org/10.1088/1361-6587/acb173· OSTI ID:1963024

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University of York (United Kingdom)
Culham Science Centre, Abingdon (United Kingdom). Culham Centre for Fusion Energy (CCFE), EURATOM/UKAEA Fusion Association
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

The steep plasma pressure gradient that forms at the edge of the high confinement, H-mode regime of tokamak operation provides free energy to drive electromagnetic micro-instabilities that are widely believed to influence the transport processes in this so-called pedestal region. This high pressure gradient also provides a high current density (bootstrap current), known to influence ballooning mode stability and to be important for driving kink modes in the ideal magneto-hydrodynamic plasma model (so-called peeling-ballooning modes). Furthermore, efficient, steady state future tokamak power plants must operate with a large bootstrap current in the core and especially concerning spherical tokamaks, confinement will be influenced by electromagnetic turbulence. To accommodate these important situations, conventional electromagnetic gyrokinetic theory is extended to incorporate neoclassical effects in the equilibrium drives, allowing $$B_{\vartheta} ~ B_0$$ (B0 is the confining magnetic field, and $$B_{\vartheta}$$ is its poloidal component). This provides a global gyrokinetic model that self-consistently captures the consequences of large bootstrap current fractions on the equilibrium distribution functions.

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Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE; Engineering and Physical Sciences Research Council (EPSRC)

Grant/Contract Number:: AC02-09CH11466; EP/R034737/1

OSTI ID:: 1963024

Journal Information:: Plasma Physics and Controlled Fusion, Vol. 65, Issue 4; ISSN 0741-3335

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
gyrokinetic theory
tokamak pedestal
spherical tokamak plasma
bootstrap current
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peeling ballooning modes

Title: Nonlinear second order electromagnetic gyrokinetic theory for a tokamak plasma

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