Volume 32 Issue 1
Dec 2017
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SONG Yunfei, ZHENG Zhaoyang, WU Honglin, ZHENG Xianxu, WU Qiang, YU Guoyang, YANG Yanqian. A Desktop Laser Driven Shock Wave Technique and Its Applications to Molecular Reaction Mechanism of Energetic Materials[J]. Chinese Journal of High Pressure Physics, 2018, 32(1): 010107. doi: 10.11858/gywlxb.20170599
Citation: SONG Yunfei, ZHENG Zhaoyang, WU Honglin, ZHENG Xianxu, WU Qiang, YU Guoyang, YANG Yanqian. A Desktop Laser Driven Shock Wave Technique and Its Applications to Molecular Reaction Mechanism of Energetic Materials[J]. Chinese Journal of High Pressure Physics, 2018, 32(1): 010107. doi: 10.11858/gywlxb.20170599

A Desktop Laser Driven Shock Wave Technique and Its Applications to Molecular Reaction Mechanism of Energetic Materials

doi: 10.11858/gywlxb.20170599
  • Received Date: 26 Jun 2017
  • Rev Recd Date: 11 Jul 2017
  • The miniature desktop pulse laser equipment can be used to drive shock wave and load dynamic high pressure (DHP) in materials, a technique marked by its low cost, high experimental repetition frequency and ultra high loading rate.The present paper presents the work we have done so far on the desktop laser driven shock wave technique and its corresponding application in exploring the molecular reaction mechanism of energetic materials under shock.We have built an experimental system using nanosecond laser pulses and developed a method to characterize the features of shock wave.The laser driven shock wave obtained in our experiment has a rise-time of only a few nanoseconds and a peak pressure of no less than 2 GPa.This experimental system has been used to study the shock sensitivity of the typical energetic materials RDX.It was found that the intramolecular charge transfer induced by DHP is a key factor influencing the sensitivity.Under high pressure, the electrons on the C-N heterocycle will transfer to the nitro group, leading to the increase of the sensitivity of NO2.This result can provide experimental reference for understanding the shock ignition mechanism of RDX.Through the present and the future subsequent work, we expect to develop a comprehensive experimental technique that can support the investigation about the shock ignition mechanism of energetic materials on the molecular level.

     

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