| 摘要 |
PURPOSE:To minimize the pulverization of graphite and prolong the life of a laser tube by coating the inner surface of the charging center hole in the graphite plate constituting a plasma thin tube with silicon carbide. CONSTITUTION:The graphite plate for the plasma thin tube of a laser tube is made of graphite and the inner surface of its charging small hole 8 is coated with silicon carbide 12. When the graphite plate of said structure is employed as a plasma thin tube in a rare gas ion laser tube, charging is performed through the center small hole 8, and the temperature of the whole plate rises. However, because the inner surface of the hole 8 is coated with silicon carbide 12, pulverization is restricted to the minimum. Moreover, the heat dissipation from the plate is mainly performed by the peripheral surface. however, there is no silicon carbide on said portion, where graphite itself is exposed. Therefore, there is no interference with the heat dissipation. |
