THE INFLUENCE OF PULSED PLASMAS ON EROSION OF THE SURFACE OF METAL MATERIALS

Abstract

Plasma focus are used as test beds for disruption simulation experiments on plasma facing materials, because the incident energy fluxes and the discharge duration are similar order as those expected during disruptions in ITER. The PF-30 facility was used for the testing of materials under incident energies up to 230 J/cm². In this work have been tested Fe-79 %, C-19 %, Si-1 %, Fe-68 %, Cr-14 %, Mn-8 %, C-7 %, Si-1 % and Ti-90 %, Al-6 %, O-2 %, C-1 % materials. From the experimental results a scaling of the ablation with incident energy density was derived. The maximal resulting ablation depth on materials is 0.2 μm per J/cm² of incident energy density.