[en] A method for numerical simulation of transient electromagnetic processes in conducting tokamak structures taking into account the evolution of location and shape of MHD-equilibrium plasma filament cross section is proposed. The plasma current disruption process in the compact tokamak designed for investigating the fusion burning physics is analyzed. It is shown that transition from static to dynamic plasma filament models results in the 1.5-2-fold increase of peaks and essential variation of the design electrodynamical loads on the discharge chamber. Plasma current profile flattening in the initial disruption phase leads to appearance of backswings on the time-dependent load curves, and vertical plasma displacement in the final current disruption phase taken into account results in the occurrence of vertical forces acting on the chamber as a whole body, as well as great horizontal forces applied to the sector faces. 12 refs.; 7 figs.; 2 tabs

[en] An analysis shows that the existing nuclear technology data bases are not sufficient to arrive at a DEMO with reasonable confidence in achieving target availability levels. In order to provide these data, a testing facility capable of simulating neutron environment in a fusion reactor is needed. A number of proposals for plasma-type neutron sources have been made recently to meet the testing requirements. In comparison with the other proposed schemes, which exclusively capitalize the advanced tokamak concepts, the neutron source based on gas-dynamic trap (GDT) concept has rather attractive design features stemming from its axial symmetry. Recently, significant progress in the pre-conceptual design of the source has been made. Firstly, application of up-to-date technology reduced the power consumption of the magnets also providing its longer lifetimes; secondly, the plasma parameters were revised using a self-consistent numerical model which, in particular, in contrast to that initially used, accounting for the collisions between the fast ions. Further development of the model was supported by experiments on the GDT facility at Budker Institute