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Incidence of rough and irregular atmospheric ice particles from Small Ice Detector 3 measurements
(2013)
The knowledge of properties of ice crystals such as size, shape, concavity and roughness is critical in the context of radiative properties of ice and mixed phase clouds. Limitations of current cloud probes to measure these ...
Modelling diffraction by facetted particles
(2012-01-23)
A method to approximate azimuthally resolved light scattering patterns and phase functions due to diffraction and external reflection by strongly absorbing facetted particles is demonstrated for a cube and compared with ...
Classifying atmospheric ice crystals by spatial light scattering
(2008)
We describe preliminary results from an optical scattering instrument designed to assess the shapes and sizes of microscopic atmospheric cloud particles, especially the smallest ice crystals, that can profoundly affect ...
Measurement and modeling of light scattering by small particles
(University of Bremen, 2008)
At the University of Hertfordshire we measure and model light scattering by small particles, in particular by such relevant for climate research. The measurements comprise phase functions, linear polarization of single ...
Characterization of small ice crystals using frequency analysis of azimuthal scattering patterns
(2007)
Azimuthal scattering patterns obtained from ice crystals using the Small Ice Detector 2 are examined. They are converted to frequency spectra using Fast Fourier Transform. To classify the shape of the crystals, the spectra ...
Light scattering by complex ice-analogue crystals
(2006)
Angle-dependent light scattering measurements on single ice analogues crystals are described. Phase functions and degree of linear polarization are measured for electrodynamically levitated crystals. A procedure for ...
Introducing phase tracing into a computational method which combines ray-tracing with diffraction on facets
(University of Bremen, 2005)
The viability of introducing phase tracing into our ray tracing with diffraction on facets model is investigated. In order to prove the method, Monte Carlo ray-tracing results for a slit, based on our diffraction formula ...
Stability characteristics of cylindrical fibres in an electrodynamic balance designed for single particle investigation
(2002)
An electrodynamic balance (EDB) of the double ring double disc type has been designed for studying single microparticles. It allows electrostatic particle injection and recovery as well as alignment of elongated particles. ...