果冻传媒

In present tokamak experiments the effect of the fast MHD induced energy losses to the first wall are mostly tolerable. However, in ITER and future fusion power plants the resulting heat fluxes are likely to be beyond the melting limits of the plasma facing components.

Large-scale computer simulation can give valuable insight in the underlying physics of MHD instabilities as well as the methods for their control. For this purpose, the MHD simulation code JOREK is under development within the European fusion program (). The JOREK code is unique in that it combines a (MHD) fluid description of the main plasma with realistic description of the plasma wall interaction. This includes a particle model for neutrals and impurities, describing the sputtering, ionization, recombination and collisions.

The main applications include so-called Edge Localised Modes (ELMs), radiative instabilities leading to disruptions and MHD instabilities driven unstable by the population of fast particles in the plasma originating from fusion reactions and external heating.