Optics and Fluid Dynamics Department annual progress report 1 January - 31 December 1991

Research in the Optics and Fluid Dynamics Department covers quasi-elastic light scattering, optics and electronic information processing, continuum physics
and activities in connection with the Euratom fusion association. A summary of
activities in 1991 is presented. Optical diagnostic methods based on quasi-elastic light scattering have been developed. Beam propagation in random and nonlinear media has been investigated. Spatial and temporal processing schemes, especially for pattern recognition, have been investigated. Within the area of fluid dynamics spectral models for studying the dynamics of coherent structures have been developed. Coherent structures have ben investigated in a plasma and are now also investigated in a rotating fluid. Fusion relevant work performed under the Euratom association includes investigations of turbulent transport and the development of diagnostic methods. A special activity is concentrated on the development of pellet injection systems for fusion research.