TY - JOUR
T1 - Portable device to determine particle asymmetry parameter
AU - Heinson, Yuli W.
AU - Sorensen, Christopher M.
AU - Chakrabarty, Rajan K.
N1 - Publisher Copyright:
© 2019 Optical Society of America.
PY - 2019/4/1
Y1 - 2019/4/1
N2 - Accurate characterization of the asymmetry parameter g is of crucial importance for radiative transfer calculations. Here, we present a portable light scattering (PLS) device designed for in situ, real-time, and contact-free measurements of the particle phase function. The integration time is 20ms for each measurement. Using this device, we measured g values for laboratory-generated brown (organic) carbon aerosol and soot, and commercially available Arizona Road Dust. For the three types of aerosol, the g values were 0.664 ± 0.002, 0.506 ± 0.004, and 0.701 ± 0.020, respectively. The smallest angle our PLS device approaches is 0.7°, which is an order of magnitude smaller than that of commercial nephelometers, thus facilitating more accurate determination of g.
AB - Accurate characterization of the asymmetry parameter g is of crucial importance for radiative transfer calculations. Here, we present a portable light scattering (PLS) device designed for in situ, real-time, and contact-free measurements of the particle phase function. The integration time is 20ms for each measurement. Using this device, we measured g values for laboratory-generated brown (organic) carbon aerosol and soot, and commercially available Arizona Road Dust. For the three types of aerosol, the g values were 0.664 ± 0.002, 0.506 ± 0.004, and 0.701 ± 0.020, respectively. The smallest angle our PLS device approaches is 0.7°, which is an order of magnitude smaller than that of commercial nephelometers, thus facilitating more accurate determination of g.
UR - https://www.scopus.com/pages/publications/85064397570
U2 - 10.1364/OE.27.010152
DO - 10.1364/OE.27.010152
M3 - Article
C2 - 31045160
AN - SCOPUS:85064397570
SN - 1094-4087
VL - 27
SP - 10152
EP - 10158
JO - Optics Express
JF - Optics Express
IS - 7
ER -