Optical Diagnostics For The Investigation Of The Interaction Of Discharge And Supersonic Flow In A Pulsed Co-Laser

R. Nowack; W. Mayerhofer; H. Hugel

doi:10.1117/12.968041

1 February 1985 Optical Diagnostics For The Investigation Of The Interaction Of Discharge And Supersonic Flow In A Pulsed Co-Laser

R. Nowack, W. Mayerhofer, H. Hugel

Author Affiliations +

Proceedings Volume 0491, 16th Intl Congress on High Speed Photography and Photonics; (1985) https://doi.org/10.1117/12.968041
Event: 16th International Congress on High Speed Photography and Photonics, 1984, Strasbourg, France

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.

Citation Download Citation

R. Nowack, W. Mayerhofer, and H. Hugel "Optical Diagnostics For The Investigation Of The Interaction Of Discharge And Supersonic Flow In A Pulsed Co-Laser", Proc. SPIE 0491, 16th Intl Congress on High Speed Photography and Photonics, (1 February 1985); https://doi.org/10.1117/12.968041

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