Light scattering from spherical and irregular particles over a wide angular range скачать в хорошем качестве

Light scattering from spherical and irregular particles over a wide angular range

Speaker Information: Dr. Prakash Gautam is a postdoctoral research associate at the Desert Research Institute (DRI) and completed his PhD at Kansas State University. Dr. Gautam is engaged in research combining experimental and theoretical aspects of electromagnetic and light scattering, particularly in atmospheric, climate, and aerosol physics. His work involves designing and developing a multi-angle light scattering setup for real-time, in situ characterization of the optical properties of aerosol particles such as mineral dust, ice crystals, pollen, and bioaerosols. These optical properties include phase function, extinction (scattering + absorption), asymmetry parameter, single scattering albedo (SSA), lidar ratio (LR) , linear depolarization ratio (LDR), and other scattering matrix elements. His recent research has been particularly focused on the development of several key instruments and concepts: 1) a cost-effective sensor for monitoring ambient particulate matter using near-forward scattering, 2) a polar nephelometer capable of measuring light scattering from an extreme forward scattering angle to near exact backscattering angle, 3) theoretical and experimental analysis of the sensitivity of key backscattering phenomena in relation to particle properties such as size, shape, and complex refractive index, 4) the optical properties of soot in various stages of aging, including soot coated with sulfate and other organic materials; and 5) optimizing current aerosol measurement technologies, such as integrating nephelometers by incorporating novel optical schemes.