| 摘要 |
PROBLEM TO BE SOLVED: To provide a plasma gun with a pressure gradient, which is resistant to heat and shocks, hardly causes damages to sealed part, being easy to position an insulation member at an assembly. SOLUTION: The plasma gun with pressure gradient I1, composed of a cathode part 11, and a cylindrical insulation member 14 with a first middle electrode 12 and a second middle electrode 13, forming a sealed space between the cathode part 11 and the first middle electrode 12, and sealing collars 3A, 3B with an insulation member 14 composed of a water cooled metallic cylindrical body 2 with a water-cooling jacket 1, interposed between the water-cooled metallic cylindrical body 2 and the cathode part 11, and between the water-cooled metallic cylindrical body 2 and the first middle electrode 12 respectively, keeping the water-cooled metallic cylindrical body 2 in a state of electrical isolation. |
