| 摘要 |
A laser construction utilizes a gas which assumes an ionic state at the discharge temperature and in the active discharge region the plasma is contained and "guided" by a tube exhibiting anisotropic and semi-conductor properties, pyrolytic carbon being used as an example. The tube utilizes the thermal and electrical characteristics of the material such that radially of the axis of discharge the tube exhibits high thermal conductivity and axially of the discharge the tube exhibits low thermal conductivity and a semi-conductor electrical character. The tube is held at an anodic potential which enables employment of a unique starting technique and reduction of ionic bombardment between the plasma and the bore of the tube. Other electrical and physical configurations for reducing ion bombardment or "sputtering" are disclosed.
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