Model of a magnetic field in poloidal divertor tokamaks affected by resonant magnetic perturbations

Abdullaev, S. S.

doi:10.1063/1.3083293

Journal Article

PreJuSER-4641

Model of a magnetic field in poloidal divertor tokamaks affected by resonant magnetic perturbations

Abdullaev, S. S.FZJ*

2009
American Institute of Physics [S.l.]

Physics of plasmas 16, (2009) [10.1063/1.3083293]

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Please use a persistent id in citations: http://hdl.handle.net/2128/18152 doi:10.1063/1.3083293

Abstract: A generic analytical model for the description of magnetic field lines in poloidal divertor tokamaks in the presence of external resonant magnetic perturbations is proposed. It is based on the Hamiltonian description of magnetic field lines in tokamaks. The safety factor and the spectra of magnetic perturbations are chosen by the requirement to satisfy their generic behavior near the magnetic separatrix and at the magnetic axis. The field line equations of the model are integrated using symplectic efficient mappings of field lines. The analytical formulas for the quasilinear diffusion and convection coefficients of field lines are obtained. The latter describes the outwardly directed transport of field lines at the plasma edge. It was shown that they are in a good agreement with the corresponding numerically calculated coefficients.

Keyword(s): J ; plasma flow (auto) ; plasma toroidal confinement (auto) ; plasma transport processes (auto) ; Tokamak devices (auto)