Tests of tungsten divertor mock-ups of tokamak-reactor with powerful plasma and e-beam loads

Abstract

Plasma-facing materials of divertor and the first wall of a hybrid thermonuclear reactor are studied in plasma and beam facilities with extreme high thermal and beam load. Tests of tungsten divertor mock-ups of tokamak reactor are tested with high-heat flux in the plasma device and in the e-beam facility. Water-cooled mock-ups are tested with the combination of plasma and e-beam loads: (1) thermocyclic tests with electron beam powerful load from 5 to 10 MW/m2 and then (2) plasma tests in the PLM device with stationary plasma loads up to 1 MW/m2. These two tests are carried out for the first time and simulate the variable load on divertor plates in tokamak-reactor during stationary discharges with transient ELM events. The e-beam facility provides a complete simulation of the conditions of heating and cooling of the tested components. The advantages of the tests are stationary plasma discharges in the PLM plasma device modeling reactor conditions in the divertor and SOL.