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Measurement of molecular electronic ground state oxygen O_2(^3sigma) in COIL device

Duschek F., and Grünewald K., and Handke J, and Schall W. O., (2004) Measurement of molecular electronic ground state oxygen O_2(^3sigma) in COIL device. In: XV International Symposium on Gas Flow, Chemical Lasers, and High-Power, 5777, pp. 74-77. SPIE. Prague, Czech Republic, 30. August – 3. September 2004. ISBN 0-8194-5760-4.

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Abstract

The improvement of the efficiency of singlet oxygen generators (SOG) in chemical oxygen iodine lasers (COIL) is still a key component for optimizing the performance of these lasers. Important parameters for the SOG operation are the utilization of chlorine and the singlet oxygen yield. In this work, the singlet oxygen yield is examined by two different methods: the absorption spectroscopy of ground state molecular oxygen O_2(^3sigma) based on a commercial diode laser system in conjunction with a multi-pass Herriott cell, and the measurement of spontaneous emission of the O_2(^3sigma)-O_2(^1delta) transition in the near infrared (1.27 ìm). A separate calibration cell has been build with geometry identical to the diagnostic duct of the DLR COIL for exact calibration of the absorption measurement. Results of simultaneously applied emission and absorption measurements are compared. This procedure allows the determination of the radiative lifetime of O_2(^1delta) to a value of 3730 s.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2005,
Title:Measurement of molecular electronic ground state oxygen O_2(^3sigma) in COIL device
Authors:
AuthorsInstitution or Email of Authors
Duschek F., UNSPECIFIED
Grünewald K., UNSPECIFIED
Handke J, UNSPECIFIED
Schall W. O., UNSPECIFIED
Date:2004
Journal or Publication Title:XV International Symposium on Gas Flow, Chemical Lasers, and High-Power
Volume:5777
Page Range:pp. 74-77
Editors:
EditorsEmail
Jarmila Kodymova, UNSPECIFIED
Publisher:SPIE
Series Name:Proceedings of SPIE
ISBN:0-8194-5760-4
Status:Published
Keywords:COIL, laser
Event Title:Prague, Czech Republic, 30. August – 3. September 2004
Organizer:Institute of Physics of Academy of Sciences CR
HGF - Research field:Energy
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Energy
DLR - Program:L - no assignement
DLR - Research theme (Project):UNSPECIFIED
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics
Deposited By: Dr.rer.nat. Hans-Albert Eckel
Deposited On:16 Sep 2005
Last Modified:06 Jan 2010 14:53

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