Development of a magnetized coaxial plasma gun for simulation experiment of type-I ELM heat loads

Abstract

The magnetized coaxial plasma gun (MCPG) device at University of Hyogo for simulation experiments of type-I ELM heat loads has been upgraded to improve the performance. The characteristics of the upgraded MCPG device have been investigated and compared with the previous one. The capacitor bank energy for the power supply of the MCPG was increased from 24.5 kJ to 144 kJ. In the preliminary experiments, the plasmoid with duration of ∼0.6 ms, the incident ion energy of ∼40 eV, and the surface absorbed energy density of ∼2 MJ/m2 was successfully produced by the present MCPG device at the gun voltage of 6 kV.