Dense Plasma Source Development for Fusion Application

The parameters of the plasma gun generating a fully ionized plasma jet with a high kinetic energy were improved. The modified gun produces fully ionised clean hydrogen jet with total number of accelerated particles (1-5) x 1019, the flow velocity 100-250 km/s and the pulse duration 10-15 μs. The jet with kinetic proton energy up to 300 eV may be used as a fuelling tool for tokamak Globus-M-like plasmas. Undisruptive fuelling the spherical tokamak Globus-M plasma core with the help of the developed plasma gun was achieved. A moderate density rise (up to 40%) in the central plasma region without plasma disruption was obtained. Preliminary surface investigations of the fusion reactor materials irradiated by the jet at power density 1 MW/cm2 were performed. (author)