Analysis of a plasma disruption in the fusion ignition experiment IGNITEX

Summary form only given. The IGNITEX plasma column is closely surrounded by massive conducting structural material. The conducting structure has proven to have significant effects on plasma equilibrium and stability. Although a minimum number of disruptions are expected in IGNITEX, there is no assurance that disruptions will completely be prevented. A hard disruption will have noticeable effects in the vessel and magnet systems. A possible disruption process in IGNITEX was investigated. The plasma behavior was analyzed with the finite-element MHD code ROTEUS. Both the plasma current effects on the structure and the eddy current effects on the plasma configuration are considered. The vacuum vessel, poloidal field system, toroidal field coil seams, and toroidal field magnet structure were simulated in detail. The effect of initial conditions on the eddy current distribution over the electromagnetic load on the IGNITEX structure was analyzed