| 摘要 |
PURPOSE:To generate discharge in a gas laser tube, whose starting voltage has become high due to operation for a long time, readily at a relatively low voltage, by winding a trigger coil in a spiral form around the outer surface of an outer container on the side of the cathode of the laser tube, and applying the same potential as that of an anode. CONSTITUTION:A piece of wire 7 for triggering is wound in a spiral form around the outer surface of an outer container 16 on the side of the cathode of a laser tube 1 and connected to an anode 3. When a power source is operated and a high voltage is applied between the cathode 2 and the anode 3 through a coaxial cord 5, the high voltage is simultaneously applied between the spiral shaped trigger coil 7 and the cathode 2. A gas in the tube between the trigger coil 7 and the cathode 2 is excited and ionized through the outer wall of the outer container. Since the high voltage applied between the spiral-shaped trigger coil 7 and the cathode 2 is applied to the outer wall of the outer container, main discharge is not generated in this section. Meanwhile, since the same high voltage is applied between the cathode 2 and the anode 3, the main discharge is immediately generated, and laser light 12 can be obtained. |
