Closure of the single fluid magnetohydrodynamic equations in presence of electron cyclotron current drive

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 01 Oct 2014Embargo end date: 01 Jan 2014 English Publisher:AIP PublishingJournal:Physics of Plasmas, volume 21 (issn: 1070-664X, eissn: 1089-7674,

Copyright policy )Funded by:EC | EUROfusion, NWO | Centre of Excellence for ...

Authors: Westerhof, E.; Pratt, J.;

doi: 10.1063/1.4900871 , 10.48550/arxiv.1409.5613

arXiv: 1409.5613

Closure of the single fluid magnetohydrodynamic equations in presence of electron cyclotron current drive

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Abstract

In the presence of electron cyclotron current drive (ECCD), the Ohm's law of single fluid magnetohydrodynamics is modified as E + v × B = η(J – JEC). This paper presents a new closure relation for the EC driven current density appearing in this modified Ohm's law. The new relation faithfully represents the nonlocal character of the EC driven current and its main origin in the Fisch-Boozer effect. The closure relation is validated on both an analytical solution of an approximated Fokker-Planck equation as well as on full bounce-averaged, quasi-linear Fokker-Planck code simulations of ECCD inside rotating magnetic islands. The new model contains the model put forward by Giruzzi et al. [Nucl. Fusion 39, 107 (1999)] in one of its limits.

Related Organizations

Dutch Institute for Fundamental Energy Research
Netherlands
Dutch Research Council
Netherlands

Keywords

Plasma Physics (physics.plasm-ph), FOS: Physical sciences, Physics - Plasma Physics

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