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Time resolved spectra in the infrared absorption and emission from shock heated hydrocarbonsThe wavelength range of a previously constructed multichannel fast recording spectrometer was extended to the mid-infrared. With the initial configuration, light intensities were recorded simultaneously with a silicon-diode array simultaneously at 20 adjacent wavelengths, each with a 20-micron time resolution. For studies in the infrared, the silicon diodes were replaced by a 20-element PbSe array of similar dimensions, cooled by a three-stage thermoelectric device. It is proposed that infrared emissions could be due to shock-heated low molecular-weight hydrocarbons. The full Swan band system appeared in time-integrated emission spectra from shock-heated C2H2; no soot was generated. At low resolution, the profiles on the high-frequency side of the black body maximum show no distinctive features. These could be fitted to Planck curves, with temperatures that declined with time from an initial high that was intermediate between T5 (no conversion) and T5(eq).
Document ID
19910056019
Document Type
Conference Paper
Authors
Bauer, S. H. (Cornell Univ. Ithaca, NY, United States)
Borchardt, D. B. (Cornell University Ithaca, NY, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1990
Subject Category
ATOMIC AND MOLECULAR PHYSICS
Meeting Information
International Symposium on Shock Waves and Shock Tubes(Bethlehem, PA)
Funding Number(s)
CONTRACT_GRANT: NAGW-1262
CONTRACT_GRANT: NSF AST-87-04623
Distribution Limits
Public
Copyright
Other