In order to study the discharge characteristics of carbon- dioxide laser tube with distributing gold rings, a comparison experiment has been carried out with two carbon- dioxide laser tubes -- one was typical, the other was improved by putting a series of gold rings in the discharge capillary. Two kinds of gases -- helium and neon have been used in the experiment. The results showed that both the breakdown voltage and the terminal voltage of the laser tube having gold rings are increasing significantly in comparison with the tube without gold rings.
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