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TIME-SEQUENCED X-RAY OBSERVATION OF A THERMAL EXPLOSION

The evolution of a thermally-initiated explosion is studied using a multiple-image x-ray system. HMX-based PBX 9501 is used in this work, enabling direct comparison to recently-published data obtained with proton radiography [1]. Multiple x-ray images of the explosion are obtained with image spacing...

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Bibliographic Details
Main Authors: Tringe, J W, Molitoris, J D, Smilowitz, L, Kercher, J R, Springer, H K, Henson, B F, Glascoe, E A, Greenwood, D W, Garza, R G, Wong, B M, Batteux, J D, Maienschein, J L
Format: Conference Proceeding
Language:English
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Summary:The evolution of a thermally-initiated explosion is studied using a multiple-image x-ray system. HMX-based PBX 9501 is used in this work, enabling direct comparison to recently-published data obtained with proton radiography [1]. Multiple x-ray images of the explosion are obtained with image spacing of ten microseconds or more. The explosion is simultaneously characterized with a high-speed camera using an interframe spacing of 11 us. X-ray and camera images were both initiated passively by signals from an embedded thermocouple array, as opposed to being actively triggered by a laser pulse or other external source. X-ray images show an accelerating reacting front within the explosive, and also show unreacted explosive at the time the containment vessel bursts. High-speed camera images show debris ejected from the vessel expanding at 800-2100 m/s in the first tens of us after the container wall failure. The effective center of the initiation volume is about 6 mm from the geometric center of the explosive.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.3295164