A diagnostic for microsecond time-resolved temperature measurements behind shock waves, using ultraviolet laser absorption of vibrationally hot carbon dioxide, is demonstrated. Continuous-wave laser radiation at 244 and 266 nm was employed to probe the spectrally smooth CO2 ultraviolet absorption, and an absorbance ratio technique was used to determine temperature. Measurements behind shock waves in both nonreacting and reacting (ignition) systems were made, and comparisons with isentropic and constant-volume calculations are reported.
© 2005 Optical Society of America
Original Manuscript: January 7, 2005
Revised Manuscript: April 22, 2005
Manuscript Accepted: May 17, 2005
Published: November 1, 2005
Matthew A. Oehlschlaeger, David F. Davidson, and Jay B. Jeffries, "Temperature measurement using ultraviolet laser absorption of carbon dioxide behind shock waves," Appl. Opt. 44, 6599-6605 (2005)