Initiation of PETN by millisecond duration laser pulses

摘要

We propose a method to identify the thermal laser triggering mechanism, while the more efficient photochemical mechanism of initiation. The method relies on a different dependence of the efficiency of these mechanisms on the intensity and duration of the initiating radiation. The experimental verification of the method is carried out. It is shown that the threshold for initiation of thermo-chemical pure PETN with luminosity of about 10~4 W/cm~2 than 75 J/cm~2, the threshold for initiation of a thermo-chemical PETN with light-absorbing inclusions (0.1 wt%. Carbon black) drops to 14 J/cm~2.