Spatially-and temporally-resolved multi-parameter interferometric rayleigh scattering system and method
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United States of America Patent
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Mar 10, 2015
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Jun 6, 2013
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Nov 7, 2012
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May 7, 2010
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Abstract
A system that simultaneously measures the translational temperature, bulk velocity, and density in gases by collecting, referencing, and analyzing nanosecond time-scale Rayleigh scattered light from molecules is described. A narrow-band pulsed laser source is used to probe two largely separated measurement locations, one of which is used for reference. The elastically scattered photons containing information from both measurement locations are collected at the same time and analyzed spectrally using a planar Fabry-Perot interferometer. A practical means of referencing the measurement of velocity using the laser frequency, and the density and temperature using the information from the reference measurement location maintained at constant properties is provided.
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