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Proceedings Paper

Optical Diagnostics For The Investigation Of The Interaction Of Discharge And Supersonic Flow In A Pulsed Co-Laser
Author(s): R. Nowack; W. Mayerhofer; H. Hugel
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Paper Abstract

Several phenomena limiting the performance of a pulsed supersonically cooled CO-laser with 10 4s discharge excitation are investigated. Among these are density perturbations, which result from nonuniform heat release within the discharge volume due to the extreme high power density in the cathode fall. They are studied by high speed shadowgraphy. In addition, discharge instabilities, which also interact with the flow and lead to glow to arc transition are observed by high speed image converter photography. It is found that for an excitation pulse as short as 10 4m the density perturbations play a minor role, whereas the discharge instabilities limit the laser performance.

Paper Details

Date Published: 1 February 1985
PDF: 4 pages
Proc. SPIE 0491, 16th Intl Congress on High Speed Photography and Photonics, (1 February 1985); doi: 10.1117/12.968041
Show Author Affiliations
R. Nowack, DFVLR Institut fur Technische Physik (Germany)
W. Mayerhofer, DFVLR Institut fur Technische Physik (Germany)
H. Hugel, DFVLR Institut fur Technische Physik (Germany)

Published in SPIE Proceedings Vol. 0491:
16th Intl Congress on High Speed Photography and Photonics
Michel L. Andre; Manfred Hugenschmidt, Editor(s)

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