Impedance monitor to protect the thyratron in metal vapor lasers

C. E. Lin, C. Y. Yang, T. C. Wang, C. L. Huang

Research output: Contribution to journalArticlepeer-review


It is found that the appearance of high reverse-voltage spikes on the thyratron anode in the discharge of metal vapor lasers due to high laser impedances can easily be monitored by a dc current meter in series with the bypass inductor of the discharge circuit. Experiments are demonstrated using a copper vapor laser. Results show that the proposed impedance monitor is effective, reliable, and economical. The meter deflection corresponding to acceptable, well-behaved thyratron operation can be obtained easily by the residual ionization-control method using a clean laser tube. By keeping the deflection within a specified limit, the lifetime of thyratron can greatly be extended.

Original languageEnglish
Pages (from-to)2893-2895
Number of pages3
JournalReview of Scientific Instruments
Issue number9
Publication statusPublished - 1989

All Science Journal Classification (ASJC) codes

  • Instrumentation


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