Color Imaging of Shock Front Emergence in TNT

Report No. ARL-TR-6181
Authors: Kevin McNesby, Gerrit Sutherland, and Richard Benjamin
Date/Pages: October 2012; 20 pages
Abstract: This report describes the use of high speed color digital optical imaging of light emission at the shock/detonation front to determine the planarity (or lack thereof) of a detonation wave produced in an explosive sample using a 4-inch diameter plane wave generator (lens). A high speed, color digital framing camera (Cordin Company Model 570) was used to record images of detonation front emergence from samples of the solid high explosive TNT (trinitrotoluene, C7H5N3O6). Frame-by-frame images of the event are deconstructed into red, green, and blue matrices used by the digital camera system to produce color images. CTH-based calculations (CTH-based calculations (a hydrodynamic computer code developed at Sandia National Laboratories), predicting the spatial profile of the shock/detonation front as it emerges from the solid explosive surface, are compared with bandwidth-specific contour maps made using the color matrices. The correlation between contour maps of light emission at different bandwidths and predicted shock/detonation profiles is discussed.
Distribution: Approved for public release
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Last Update / Reviewed: October 1, 2012