Direct observation of the phenomenology of a solid thermal explosion using time-resolved proton radiography |
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Authors: | Smilowitz L Henson B F Romero J J Asay B W Schwartz C L Saunders A Merrill F E Morris C L Kwiatkowski K Hogan G Nedrow P Murray M M Thompson T N McNeil W Rightley P Marr-Lyon M;pRad Collaboration |
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Institution: | Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. |
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Abstract: | We present a new phenomenology for burn propagation inside a thermal explosion based on dynamic radiography. Radiographic images were obtained of an aluminum cased solid cylindrical sample of a plastic bonded formulation of octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine. The phenomenology observed is ignition followed by cracking in the solid accompanied by the propagation of a radially symmetric front of increasing proton transmission. This is followed by a further increase in transmission through the sample, ending after approximately 100 micros. We show that these processes are consistent with the propagation of a convective burn front followed by consumption of the remaining solid by conductive particle burning. |
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