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Stable and efficient operation of a large-bore copper vapor laser with funnel-shaped, grooved copper electrodes

Sadighi Bonabi, R ; Sharif University of Technology | 2017

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  1. Type of Document: Article
  2. DOI: 10.1088/1555-6611/aa533b
  3. Publisher: Institute of Physics Publishing , 2017
  4. Abstract:
  5. Using an appropriate design of electrodes and adjustment of the thyratron decoupling circuit as a high-repetition-rate and high-voltage switch, very stable operation of a copper vapor laser at high pressures was obtained. This was achieved by canceling the intense filamentation in the laser plasma at the higher pressures. The transverse grooves on the inner surface of the funnel-shaped copper electrodes permit operation of the laser up to 100 torr. This design reduces the cathode-fall voltage, and as a result reduces the thermal loading in the cathode-fall region. The optimum pressure was 80 torr. At this condition the output power was more than that observed with expensive molybdenum electrodes in a similar laser system. © 2017 Astro Ltd
  6. Keywords:
  7. Cathode-fall region ; Filamentation ; Cathodes ; Copper ; Laser produced plasmas ; Plasma interactions ; Appropriate designs ; Cathode fall ; Cathode fall voltage ; Copper vapor laser ; Filamentation ; High repetition rate ; High voltage switches ; Molybdenum electrodes ; Electrodes
  8. Source: Laser Physics ; Volume 27, Issue 3 , 2017 ; 1054660X (ISSN)
  9. URL: http://iopscience.iop.org/article/10.1088/1555-6611/aa533b