ABSTRACT
me
The objective of beta-densitometer instrumentation at Ivy Mike shot was, primarily, to
measure material density near ground surface as a function of time and, secondarily, to test
the latest modifications to previous densitometer models.
The results showed (1) that thermal or preshock dust is absent at a ground range of about
23,000 {t (Station 690.02), (2) that it is possible to calculate the overpressure due to air shock
alone from the measured density change, provided that preshock turbulenceis not excessive,
and (3) that the modifications to the densitometer proved to be satisfactory. The calibration
and electronic engineering of the Ivy model densitometer were considerably improved over
previous models.
3-4
h
RESTRICTED DATA —Q3RIP- SECURITY INFORMATION