Configuration for tungsten-inert gas arrangement: DC, atmospheric pressure, thermal, La-W cathode (length: 20 mm, radius: 2 mm, tip: 60° conical with 0.2 mm plateau radius), water-cooled copper anode (radius: 33 mm, thickness: 7 mm), cathode-anode distance: 8 mm, current: 100 A, Ar flow rate: 12 slm, nozzle inner radius: 8 mm