Nanosecond photography of fast processes in invisible (UV) light with a nitrogen laser and new study of a train of shock waves
Askar'yan G. A. , Yurkin A. V.
A simple and effective method for nanosecond photography of fast processes is described. It uses self-shortened UV pulses from a nitrogen laser. This method has been used to detect new processes in shock-wave physics: a generation of a train of shock waves in air and water during fluctuations of energy release (oscillations of the current in a discharge circuit). It thus becomes possible to study the interior of the shock wave and a directed propagation of shock waves in the flow of a heated or light gas. A train of shock waves can be used for effective reflection of rf and visible radiation.