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Lidar system applied in atmospheric pollution monitoring

A lidar system, incorporating tunable dye lasers and a 25-cm diam Newtonian telescope, has been constructed and applied in atmospheric pollution monitoring. The system, which is fully controlled by a specially designed microcomputer, has been used in several field tests, where stack effluents as well as the ambient air have been monitored. Results from particle, NO2, and SO2 measurements are discu

Transient electromagnetic pulse propagation in temporally dispersive materials

Popular Abstract in Swedish Avhandlingen behandlar elektromagnetisk vågutbredning i dispersiva material. Ett material är dispersivt om vågor med olika frekvenser propagerar genom det med olika hastigheter, dvs om materialparametrar är frekvensberoende. Pulsutbredning i dispersiva media karakteriseras av att pulsens form ändras under utbredning genom materialet. Traditionellt behandlas vågutbredninThis thesis treats the problem of transient electromagnetic pulse propagation in temporally dispersive media. The analysis is performed using time-domain techniques. In particular, the dispersive wave splitting which decouples the Maxwell equations both in vacuum and inside the medium is utilized. Complex time-dependent electromagnetic fields are introduced. These fields simplify the Maxwell equat