A high-power low-temperature air plasma generator with a divergent channel of the output electrode

We have developed and studied a powerful high-enthalpy ($H\ge$ 20 kJ/g) air plasma jet generator with a divergent channel of the output electrode, which belongs to the class of dc plasmatrons with a thermionic cathode. The plasma generator possesses an efficiency of about 80% and ensures the formation of slightly divergent (2$\alpha$ = 12$^\circ$) plasma jet with diameter $D$ = 50 mm and a mass-average temperature of 6000–9000 K.