Characterization of vapor and aerosol flows by photothermal methods
- 1 September 1986
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Physics
- Vol. 64 (9) , 1121-1123
- https://doi.org/10.1139/p86-193
Abstract
Pulsed laser heating is used to label aerosols or absorbing vapors in a flow. In an absorbing vapor, the photothermal heating creates a travelling thermal lens that can be detected by a probe-beam deflection scheme yielding information on flow velocity and the concentration of absorbing species. The absorption by volatile aerosols is detected by transient variation in Mie scattering caused by particle evaporation. In addition, the velocity of a single moving aerosol can be measured by monitoring its infrared thermal emission induced by an excitation laser beam.Keywords
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