Effect of Variations in the Gas-Dynamic Unloading on the Laser Initiation of the PETN-Aluminum Composite

被引：4

作者：

Aduev, B. P. ^{[1
]}

Nurmukhametov, D. R. ^{[1
]}

Zvekov, A. A. ^{[1
]}

Liskov, I. Yu. ^{[1
]}

Belokurov, G. M. ^{[1
]}

Nelyubina, N. V. ^{[1
]}

机构：

[1] Russian Acad Sci, Siberian Branch, Inst Coal Chem & Mat Sci, Kemerovo 650000, Russia

来源：

TECHNICAL PHYSICS | 2019年 / 64卷 / 02期

关键词：

ABSORPTION; ADDITIVES;

D O I：

10.1134/S1063784219020026

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Thresholds of explosive decomposition H-cr under irradiation using the first harmonic of a pulsed neodymium laser (14 ns) are experimentally determined for pentaerythritol tetranitrate (PETN) with aluminum nanoparticles (100 nm) at concentrations ranging from 0.05 to 1 wt %. Amplitudes of optoacoustic signals are measured versus concentrations of impurities in the sample at a fixed laser fluence. The experiments are performed in two regimes. In the first one, the irradiated surface of the sample is covered with a finite-weight glass plate that impedes the gas-dynamic unloading. In the second regime, an external pressure of no less than 10(7) Pa is applied to the glass plate to prevent the gas-dynamic unloading. The interpretation of the experimental effects is proven by the results of theoretical simulation.

引用

页码：143 / 147

页数：5

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