Detection of shocks generated by intense pulsed ion beam irradiation

Because the shocks induced by intense pulsed ion beam (IPIB) irradiation are responsible for long range effect, it is necessary to analyze the behavior of shocks theoretically and experimentally. But it is very difficult to find stress signals due to the 50 ns pulse duration of IPIB. In this paper, a detecting system was designed and manufactured carefully. A polyvinylidene fluoride (PVDF) film with 100 μm in thickness was selected as the piezoelectric probe in our detecting system. With this system, shocks, induced by IPIB irradiation, were caught at the backside of Al target successfully. The thicknesses of the Al samples were 1 mm and 2 mm respectively. Samples were irradiated by IPIB with different current density ranging from 250 A/cm2 to 800 A/cm2. Wave profiles were caught and record by oscilloscope of model TDS2024 (200 MHz, 2 Gs) and TDS3052B (500 MHz, 5 Gs). Experimental results have shown in good accordance with our theoretical calculations.