Eddy current induced vertical forces during a plasma disruption in KSTAR

We calculate eddy current induced vertical forces on poloidal field (PF) coils and plasma facing conductors during a plasma disruption in Korea Superconducting Tokamak Advanced Research (KSTAR). A system of axisymmetric circuit equations, taking into account a saddle-connected three-dimensional configuration of KSTAR passive plates, combined with a prescribed plasma disruption scenario, is solved using a symmetric and anti-symmetric decomposition technique. The maximum vertical force on each independent conductor, which is designed to have its own vertical support, is calculated. It is shown that the effect of initial equilibrium magnetic fields upon maximum vertical forces is significant, and it should be included in the design analysis of vertical supports for tokamak conducting structures.