Jet generator for generating a focused plasma jet

摘要

Jet generator (1) for generating a focused plasma jet (2) by means of arc discharge (3) under the supply of a working gas (4) comprising– a pin electrode (5),– a concentrically with respect to the pin electrode (5) arranged hollow cylindrical, with respect to the pin electrode (5) insulated jacket (6) of electrically conductive material,– at its front end, an annular electrode (7) is arranged, which defines a nozzle opening (9) having a diameter smaller than the diameter of the hollow cylindrical jacket (6) is,– the on the opposite end face a supply for the working gas (4) comprises,– a voltage source (21) for applying a voltage between the pin - (5) and ring electrode (7), wherein the sheath (6) and / or the ring electrode (7) are grounded;and wherein– the hollow cylindrical jacket (6) on its front a conically in the direction of the annular electrode (7) has conical portion (8),– the pin electrode (5) in the hollow cylindrical sleeve (6) projects, but in front of the conical section..