TY - JOUR
T1 - Experimental and numerical analysis of narrowband coherent Rayleigh-Brillouin scattering in atomic and molecular species
AU - Cornella, Barry M.
AU - Gimelshein, Sergey F.
AU - Shneider, Mikhail N.
AU - Lilly, Taylor C.
AU - Ketsdever, Andrew D.
PY - 2012/6/4
Y1 - 2012/6/4
N2 - Coherent Rayleigh-Brillouin scattering (CRBS) line shapes generated from all narrow-band pump experiment, Direct Simulation Monte-Carlo (DSMC) approach, and published kinetic line shape models are presented for argon, molecular nitrogen, and methane at 300 & 500 K and 1 atm. The kinetic line shape models require uncertain gas properties, such as bulk viscosity, and assume linearization of the kinetic equations from low intensities (<1 x 1015 W/m2) operating in the perturbative regime. DSMC, a statistical approach to the Boltzmann equation, requires only basic gas parameters available in literature and simulates the forcing function from first principles without assumptions on laser intensity. The narrow band experiments show similar results to broadband experiments and validate the use of DSMC for the prediction of CRBS line shapes.
AB - Coherent Rayleigh-Brillouin scattering (CRBS) line shapes generated from all narrow-band pump experiment, Direct Simulation Monte-Carlo (DSMC) approach, and published kinetic line shape models are presented for argon, molecular nitrogen, and methane at 300 & 500 K and 1 atm. The kinetic line shape models require uncertain gas properties, such as bulk viscosity, and assume linearization of the kinetic equations from low intensities (<1 x 1015 W/m2) operating in the perturbative regime. DSMC, a statistical approach to the Boltzmann equation, requires only basic gas parameters available in literature and simulates the forcing function from first principles without assumptions on laser intensity. The narrow band experiments show similar results to broadband experiments and validate the use of DSMC for the prediction of CRBS line shapes.
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U2 - 10.1364/OE.20.012975
DO - 10.1364/OE.20.012975
M3 - Article
C2 - 22714325
AN - SCOPUS:84863731683
SN - 1094-4087
VL - 20
SP - 12975
EP - 12986
JO - Optics Express
JF - Optics Express
IS - 12
ER -