Three-dimensional fluid simulations of a simple magnetized toroidal plasma

摘要

Three-dimensional fluid simulations are performed in a simple magnetized toroidal plasma, in whichvertical and toroidal magnetic fields create helicoidal magnetic field lines that terminate on the torusvessel. The simulations are carried out in the three-dimensional flux tube that wraps around the torusand are able to describe both interchange and drift-wave dynamics. The presence of differentturbulence regimes is pointed out; in particular, it is shown that turbulence can be quenched byeither a sufficiently large plasma source, or a sufficiently small vertical field, or a sufficiently highparallel resistivity. The simulations considered herein reveal that interchange turbulence dominatesover the drift-wave dynamics. Considering the experimental observations, we finally discuss thelimitations of the present model.