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Proceedings Paper

Long-time operation of a 5kW cw CO laser
Author(s): Osama Noda; Shizuma Kuribayashi; Shigenori Imatake; Motoe Kondo; Shunichi Sato; Kunimitsu Takahashi
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Paper Abstract

Investigation ofgas composition for a 5kW electric discharge cw CO laser was made to achievelong time operation. This device is a closed-cycle self-sustained discharge-excited cw CO laser with subsonic gas flow. Recirculating gas is cooled through heat exchangers operating with liquid N2. Under typical operating conditions, the laser is operated with a continuous fresh laser gas supply and a part of recirculating gas is exhausted to control operating pressure. As a result of removing contamination, especially CO2 gas, by the cold trap, continuous operation for more than 12 hours has been achieved at a power level of 5kW, with electrical conversion efficiency of 24%. Moreover, dependences of CO2 conceniration in the mixture on cathode materials were measured with a gas chromatograph. It has been revealed that the CO2 concentrations can be reduced to about a half by using the Molybdenum alloy or Tungsten alloy cathodes, when compared with the Copper ones.

Paper Details

Date Published: 1 February 1991
PDF: 6 pages
Proc. SPIE 1397, 8th Intl Symp on Gas Flow and Chemical Lasers, (1 February 1991); doi: 10.1117/12.26025
Show Author Affiliations
Osama Noda, Mitsubishi Heavy Industries, Ltd. (Japan)
Shizuma Kuribayashi, Mitsubishi Heavy Industries, Ltd. (Japan)
Shigenori Imatake, Mitsubishi Heavy Industries, Ltd. (Japan)
Motoe Kondo, Mitsubishi Heavy Industries, Ltd. (Japan)
Shunichi Sato, Institute of Research and Innovation (Japan)
Kunimitsu Takahashi, Institute of Research and Innovation (Japan)

Published in SPIE Proceedings Vol. 1397:
8th Intl Symp on Gas Flow and Chemical Lasers
Concepcion Maroto Domingo; Jose M. Orza, Editor(s)

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