| 摘要 |
PURPOSE:To make an output of a laser large while making the scale of a device compact by a construction wherein a negative electrode for a DC glow discharge is formed in the shape of a sharpened cone, the fore end part of the negative electrode for the DC glow discharge is opposed to a positive electrode and the negative electrode for the DC glow discharge is embedded in a hole part provided in an electrically insulating plate. CONSTITUTION:On the lower side of an electrically insulating plate 1a, a plurality of hole parts 2 are provided linearly at equal intervals. In each hole part 2, a conical needle-shaped negative electrode 8 is installed with the fore end part directed downward. Under the electrically insulating plate 1a, an electrically insulating plate 1b is disposed oppositely to the insulating plate 1a in parallel thereto. On the upper side of the insulating plate 1b, a positive electrode 5 is disposed at a position corresponding to the negative electrode 8 of the electrically insulating plate 1a. Since the negative electrode 8 is embedded inside the electrically insulating plate 1a herein, a glow discharge is not affected by proximity actions of turbulence of a flow of a laser gas, fluctuation of temperature, etc. Accordingly, a stable glow discharge is maintained. |
