The IAA cosmic dust laboratory: Experimental scattering matrices of clay particles

Details The IAA cosmic dust laboratory: Experimental scattering matrices of clay particles The IAA cosmic dust laboratory: Experimental scattering matrices of clay particles

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011icar..211..894m&link_type=abstract

Icarus, Volume 211, Issue 1, p. 894-900.

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Scientific paper

We present the first results of measurements on solid particles performed at the Instituto de Astrofísica de Andalucía (IAA) cosmic dust laboratory located in Granada, Spain. The laboratory apparatus measures the complete scattering matrix as a function of the scattering angle of aerosol particles. The measurements can be performed at a wavelength (λ) of 483, 488, 520, 568, or 647 nm in the scattering angle range from 3° to 177°. Results of special test experiments are presented which show that our experimental results for scattering matrices are not significantly contaminated by multiple scattering and that the sizes/shapes of the particles do not change during the measurements. Moreover, the measured scattering matrix for a sample of green clay particles is compared with measurements previously performed in the Amsterdam light scattering setup for the same sample. New measurements on a white clay sample at 488 and 647 nm are also presented. The apparatus is devoted to experimentally studying the angle dependence of scattering matrices of dust samples of astrophysical interest. Moreover, there is a great interest in similar studies of aerosols that can affect the radiative balance of the atmosphere of the Earth and other planets such as silicates, desert dust, volcanic ashes, and carbon soot particles.

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