DEVICE FOR GENERATING PLASMA AND FOR DIRECTING AN FLOW OF ELECTRONS TOWARDS A TARGET

摘要

Device (1) for generating plasma and for directing an flow of electrons towards a specific target (3); the device (1) comprises a hollow cathode (5); a main electrode (7) at least partially placed inside the cathode (5); a resistor (12), electrically earthing the main electrode (7); a substantially dielectric tubular element (21) extending through a wall (22) of the cathode; a ring-shaped anode (25) placed around the tubular element (21) and earthed; and an activation group (11) which is electrically connected to the cathode (5) and is able to reduce the electric potential of the cathode (5) of at least 8 kV in about 10 ns.