Detonation of Insensitive High Explosives by a Q-Switched Ruby Laser

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Abstract
Immediate longitudinal detonations have been observed in confined small‐diameter columns of PETN, RDX, and tetryl by using a focused Q‐switched ruby laser. The energy ranged from 0.8 to 4.0 J in a pulse width of 25 nsec. A 1000‐Å‐thick aluminum film deposited on a glass window was used to generate a shock wave at the window‐explosive interface when irradiated by the laser. In some cases steady‐state detonations were reached in less than ½ μsec with less than 10% variation in the detonation velocity.

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