Title :
Time evolution of tokamak plasmas in the presence of 3D conducting structures
Author :
Albanese, Raffaele ; Fresa, Raffaele ; Rubinacci, Guglielmo ; Villone, Fabio
Author_Institution :
DIMET, Univ. di Reggio Calabria, Italy
fDate :
7/1/2000 12:00:00 AM
Abstract :
This paper presents a method for the simulation of the time evolution of fusion plasmas in the presence of eddy currents induced in nonmagnetic 3D structures. The plasma is assumed to be 2D axisymmetric. The interaction between the plasma and the external currents is assumed to occur via the magnetic field averaged through the toroidal angle. The average poloidal field is computed by means of a 2D axisymmetric differential FEM formulation in terms of the poloidal magnetic flux. The 3D induced currents are calculated via an integral edge-element formulation in terms of a two-component current density vector potential. The method is also applied to derive a linearized plasma response model for the control of the plasma current position and shape in the presence of 3D conducting structures
Keywords :
Tokamak devices; current density; eddy currents; electromagnetic induction; finite element analysis; fusion reactor operation; magnetic flux; plasma instability; plasma magnetohydrodynamics; plasma toroidal confinement; 2D axisymmetric differential FEM; 2D axisymmetric plasma; 3D conducting structures; 3D induced currents; average poloidal field; external currents; fusion plasmas; induced eddy currents; integral edge-element formulation; linearized plasma response model; magnetic field; nonmagnetic 3D structures; plasma control; plasma current position control; plasma stabilisation; poloidal magnetic flux; time evolution; tokamak plasmas; toroidal angle; two-component current density vector potential; Coils; Current density; Eddy currents; Geometry; Magnetic flux; Plasma density; Plasma simulation; Shape control; Tokamaks; Toroidal magnetic fields;
Journal_Title :
Magnetics, IEEE Transactions on
