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weapons for wide area mine clearance by influence moans,
The specific ob~
jectives of their experimentation program were to:
1.
Measure and record the amplitude, duration, and extent of mine act~-
uating influences (pressure, acoustic, and magnetic) that .cev be gene»ated at the sea bottom by the explosion of a loweyield nuclear -veapon
in shallow water (approximately 150-depth).
2e
Determine the reaction of certain instrumented naval mincs to ‘re
influences generated,
Three LOU instrumentation platforms were located at distances of 5% °
20,150, and 44,750 feet from the Umbrella surface zero.
Instrumentation vas
provided to obtain:
1.
The time=pressure history resulting from the shot, including p..es-
2.
The time-history of the magnetic-field changes.
3.
The time-history of the sound-pressure leve, 2 cps to 40 kew
4.
The *imeshistory of displacement of the bottom.
sure charges due to waves, swells, and the shock wave.
~
5. The mine reedtion, inciuding such items as search-coil output,
plate-voltage rise, pressurc-switch opening, fires, and "looks".
6.
Correlation of all influence measurements enc mine reactions with
respect to time.
From the Umbrella snot the following tentative conclusions were made:
‘oe
oe
208
€% The fifth project studied the effects
of nuclear radiation on electronic
fuse components and materials, erensered Uy the Diemond O-dranre Fuze L-bora~
swam
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