UV laser diagnostic system for combustion research under microgravity at drop tower Bremen

Hans Stephen Albrecht; Daniel Mueller; T. Schroeder; Wolfgang Triebel; Ch. Eigenbrod; Jens Koenig; T. Bolik; T. Behrens; Hartmut Renken; Hans J. Rath

doi:10.1117/12.221012

20 September 1995 UV laser diagnostic system for combustion research under microgravity at drop tower Bremen

Hans Stephen Albrecht, Daniel Mueller, T. Schroeder, Wolfgang Triebel, Ch. Eigenbrod, Jens Koenig, T. Bolik, T. Behrens, Hartmut Renken, Hans J. Rath

Author Affiliations +

Proceedings Volume 2506, Air Pollution and Visibility Measurements; (1995) https://doi.org/10.1117/12.221012
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany

Abstract

This paper describes a UV laser diagnostic system by means of which laser spectroscopic experiments were performed under microgravity conditions in a ground-based drop tower for the first time. A tunable, narrow bandwidth excimer laser is positioned at the top of the drop tower. The laser beam enters a falling drop capsule containing a specially adapted burner or combustion chamber. By the use of laser induced fluorescence spectroscopy measurements of 2D concentration and temperature profiles can be performed. Solutions of selected experimental problems such as laser beam collimation over a distance of more than 120 m, compensation of capsule drift, signal detection, and data acquisition (250 frames/s, 4.7 s measuring period), are discussed in detail. First measurements of laser induced predissociation fluorescence of OH radicals in a methanol flame under microgravity conditions are presented.

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Hans Stephen Albrecht, Daniel Mueller, T. Schroeder, Wolfgang Triebel, Ch. Eigenbrod, Jens Koenig, T. Bolik, T. Behrens, Hartmut Renken, and Hans J. Rath "UV laser diagnostic system for combustion research under microgravity at drop tower Bremen", Proc. SPIE 2506, Air Pollution and Visibility Measurements, (20 September 1995); https://doi.org/10.1117/12.221012

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