PHOTOGRAPHY OF AN EXPLODING 100-TON TNT CHARGE
EDGERTON GERMESHAUSEN AND GRIER INC BOSTON MA
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The detonation of a 100-ton TNT charge took place on 3 August 1961 at the Suffolk Proving Ground near Medicine Hat in Alberta Province, Canada. The EGG effort on the explosion was intended to 1 measure electromagnetic EM signals, and 2 perform high speed photographic measurements to assist in the analysis of the EM data. This report contains only a description of the photo graphic phase of the effort. A 35 mm Fastax framing camera operating in a conventional manner, and a similar instrument modified for streak camera operation were used. Both cameras operated in nearly every respect as intended. The record for the framing camera lasted for 4.5 seconds, however at 30 msec, the entire field of-view was filled by the fireball. The streak camera recorded for a similar length of time, but useful radius vs time data could only be obtained during the first 18 msec of the explosion, at which time the streak cameras field of-view was filled by the fireball.