Speaker
Description
Recent results on implosion of strong shock wave (SSW) generated by underwater electrical explosion of a spherical wire array are presented. Microsecond pulse generator (≤38 kV, ≤380 kA, rise time ~1.3 µs) was used for explosion of Cu and Al arrays with radii of 20mm, 25mm and 30mm. A strong light emission from water in the vicinity of the array origin was used to determine the SSW time-of-flight (TOF) and the time-resolved spectrum of this emission was analyzed to estimate the temperature of the surface of the light emitted volume. The experimental results coincides with the results of the 2D hydrodynamic simulation coupled with equation of state for water and radiative transfer model showing that the water density, temperature and pressure at radii < 25 µm should be larger than ~3 g/cm3, ~1.4 eV and ~0.2 TPa, respectively.
In addition, the recent results on development of the compact ns-time duration hard x-ray source for study of radial density distribution of the single wire during its underwater electrical explosion will be presented. The x-ray flux is generated in vacuum diode with external magnetic field and powered by all solid state pulse generator (200 kV, 1 kA, 5 ns).
