Sensitization of PETN to laser radiation by opaque film coating

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This work present experimental results of PETN ignition and of numerical simulations of PETN, RDX, HMX, and TATB ignition by a copper oxide (CuO) film heated using a millisecond fiber laser YLS‐150. It was established that the dynamic ignition threshold of organic explosive materials (EM) in a three‐layer system (glass – CuO – EM) by a laser pulse has a minimum at the CuO film thickness of 12 μm . The density of the critical ignition energy of EM is increasing in the sequence of PETN, RDX, HMX, and TATB with PETN having the smallest and TATB having the highest density of the critical ignition energy.

Section: Description Of the Numerical Calculationsmentioning

confidence: 99%

Section: Ignition Of Organic Explosive Materials By a Copper Oxide Fimentioning

confidence: 99%

Section: Ignition Of Organic Explosive Materials By a Copper Oxide Fimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ignition of Organic Explosive Materials by a Copper Oxide Film Absorbing a Laser Pulse

Dolgachev

Khaneft

Mitrofanov

2018

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“…Pulsed laser radiation can induce local overheat of the sample surface and subsequent gas relief [8]. The latter can be critical for self-sustaining reaction propagation in many energetic materials [9,10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ammonium Perchlorate and Aluminum Composition Density on Characteristics of Laser Ignition

Medvedev

Tsipilev

Forat

2018

Laser ignition of stoichiometric mixture based on aluminum nanopowder and ammonium perchlorate were studied experimentally. The laser with a radiation wavelength of 1.06 μm and a pulse duration of 0.8 ms was used as a source of heat. The ignition thresholds were determined for open samples in the air and for samples confined with transparent dielectric. The difference in the obtained data is discussed within the thermal ignition theory.

Effect of Decomposition of CuO Film on Ignition of Organic Explosives by a Laser Pulse

Khaneft

Mitrofanov

Зверев

2019

Self Cite

This work presents experimental results of the PETN ignition in a three-layer system: glass -copper oxide ( CuO) -explosive materials (EM) and results of numerical simulations of the ignition of PETN, RDX, HMX, and TATB with a CuO film heated by a YLS-150 fiber laser with a pulse duration of 20 ms. In the numerical simulations, the endothermic reaction of decomposition of the CuO film and decomposition reaction of EM were taken into account. It has been established that the endothermic effect of the CuO decomposition reaction increases the dynamic ignition delay time of EM. The expression for an estimation of width of a reaction layer in EM at heating by a constant heat stream is obtained. Calculations have shown that the dynamic threshold of ignition of organic explosives by laser pulse in a three-layer system (glass -CuO -EM) has a minimum for the thickness of the copper oxide film of 5 mm. The density of the critical ignition energy of an explosive laser pulse increases in the sequence of PETN, RDX, HMX, and TATB. The calculated dependence of the PETN dynamic ignition delay time on the thickness of the CuO film is consistent with the experimental data.