Theoretical modeling of shielding for plasma flow and electron beam heating

Electron beam appears to be a good instrument for the simulation of heat loads because of low pressure to material and large depth of shielding layer, allowing for the application of higher loads. This work is focused on theoretical and numerical modeling of heating tungsten by plasma flow and electron beam heating to clarify differences in the heating process. The time necessary for vapor shielding development is found for both of them. Essential time differences between electron beams with various energies were found. It was explained by significant cooling by evaporation at one of the heating stages. The surface temperature is almost stabilized and the maximal temperature location shifts under the surface at this stage.