Study on Characteristics of the Light-Initiated High Explosive-Based Pulse Laser Initiation

Abstract

The silver acetylene silver nitrate loading technology of the light initiated high explosive, as one of important means to simulate the structural response of powerful pulsed X-ray, adopts the pulse laser initiation. It has advantages of improvement of practical control, heterogenous loading realization and simultaneous loading timeliness. In this paper, the physical and mathematical models of hot spot initiation and photochemical initiation of energetic materials under the action of laser are firstly established, and then the laser initiation mechanism of the light initiated high explosive is specifically analyzed, and the laser initiation experiment is conducted based on the optical adsorption property of the light initiated high explosive. From this study, the laser initiation thresholds of 193 nm, 266 nm, 532 nm, 1064 nm wavelengths are given, and they are 5.07 mJ/mm2, 6.77 mJ/mm2, 7.21 mJ/mm2 and 10.61 mJ/mm2, respectively, and the complete detonation process is verified by detonation velocity. This work technically supports the study of pulse laser initiation process, mechanism and explosion loading rule as well as the loading technology of the light initiated high explosive to simulate the structural response of X ray.

Profiled Detonation Waves in the Technologies of Explosion Treatment of Metals

“…The total duration of the light pulse exposure was about 6 µs. However, an impact with the duration of less than one microsecond can be satisfactory, which was not achieved by the authors of [59]. To simulate subshort pulses, it is necessary to search for new explosives being anomalously sensitive to the initiating action of a pulse light source.…”