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Proceedings Paper

Gas lasers with coaxial electrodes for ultrahigh beam power
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Paper Abstract

A new design for a rf-excited CO2-laser uses coaxial electrodes. A high frequency blower located at one end of the electrode system generates a fast axial gas flow between the electrodes. The gas flow is reversed after passing the blower and moves back to the other end of the electrode system along the outer electrode, that carries a water-cooled heat-exchanger. So the gas reaches the other end of the electrode system with lower temperature and after a second reversal it again enters the cooling system. This kind of geometry then allows a very efficient cooling. Since the plasma has a hollow cylindrical shape, the extraction of radiation is not trivial. Several possibilities are available, e.g., a multipass-zig-zag-beam geometry. A theoretical estimation shows that this geometry, where the electrode system, gas flow and heat exchanger arrangement, and the resonator are integrated in a very rugged module, allows the user to obtain -- at least theoretically -- a beam power of 15 kW with a length of approximately 1 meter and an overall diameter of 70 centimeters.

Paper Details

Date Published: 4 May 1993
PDF: 7 pages
Proc. SPIE 1810, 9th International Symposium on Gas Flow and Chemical Lasers, (4 May 1993); doi: 10.1117/12.144642
Show Author Affiliations
Markus Bohrer, Technische Univ. Wien (Austria)
Dieter Schuoecker, Technische Univ. Wien (Austria)

Published in SPIE Proceedings Vol. 1810:
9th International Symposium on Gas Flow and Chemical Lasers
Costas Fotakis; Costas Kalpouzos; Theodore G. Papazoglou, Editor(s)

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