ON ADDITIONAL INDUCTION HEATING OF PLASMA IN PULSED PLASMATRON
The possibility of additional induction heating of plasma in a pulsed plasmatron with induction discharge containing semi-open cylindrical chamber in which a cathode and an anode are installed near the ends and electrically exploding copper wires are located near the side wall. The operating principle of plasma torch is based on the creation of dense plasma between cathode and anode during electric explosion of wires, because of which quasi-spark discharge is formed, creating pulsed toroidal magnetic field that excites main induction discharge. Additional induction plasma heating is carried out by means of additional induction discharge excited by pulsed poloidal magnetic field created by exploding copper wires installed at some angle to the side wall of a chamber. It has been experimentally shown that with this method of energy input into plasma, a short-lived plasmoid is formed, after the explosion of which autonomous plasma formations with abnormally long afterglow time of 75 ms arise. The aim of the work is to evaluate the parameters of polar magnetic field required for additional plasma heating in a pulsed plasma torch with induction discharge, and to experimentally verify the operability of layout for such pulsed plasmatron.