Magnetohydrodynamic simulation on pellet plasmoid in torus plasmas

摘要

In order not only to clarify the difference on the motion of a plasmoid induced by a pellet injection between tokamak and helical plasmas but also to obtain the universal understanding on the motion in torus plasmas, magnetohydrodynamic simulations have been carried out in a tokamak, vacuum toroidal field, reversed field pinch (RFP) like- and Large Helical Device (LHD) configurations. It is found that the plasmoid motion depends on the initial location of the plasmoid in the LHD, whereas the plasmoids drift in the direction opposite to that of the curvature vector in a tokamak, vacuum toroidal field and RFP-like configurations. It is also verified that there are two main forces acting on the plasmoid, and the connection length determines the dominant force.