EXPERIMENTAL SIMULATION OF PLASMA HIGH HEAT FLUX-MATERIALS INTERACTION DURING ITER DISRUPTION

The main parameters of test facilities based on high-current coaxial p lasma accelerators developed at the Efremov Institute to study PFC can didate material damage under high heat plasma fluxes with a specific e nergy close to the PFC ITER disruptive load are given. The extremely h igh values of plasma heat flux density (up to 110 MJ m(-2)) and dynami c plasma pressure (up to 15 MPa) are unique features of these faciliti es. Research on parameters of plasma shielding layer (SL) formed durin g plasma-material interaction has shown that they are close to the SL parameters predicted for short (tau(d) < 1 ms) disruptions in ITER. Th at gives grounds for obtaining reliable results on PFC material damage in model experiments with such a disruption simulator. The test mater ial research on the VIKA facility has shown, in particular, that the m ain mechanism of metal damage is the melt layer movement due to high S L plasma pressure.