samples were removed. ?
However, only one of the three F6F drones returned
with a usable sample ,4°
Evaluation of CROSSROADS Sampling
. The Manhattan Project scientists left no doubt they had received
valuable information from the sampler drones during Operation CROSSROADS.
Sampling papers from both shots were good, although only one B-17 and one
F6F got samples on BAKER Shot,
Subsequent chemical tests indicated that
no fractionation had taken place.
The rubber air bags, carried aboard
the B-17 drone aircraftworked very well for collecting samples,
They
had been opened for about 30 seconds while in the cloud; and scooped up
air and debris samples.
However, technicians were unable to use these
because ", . . we were unable to learn in time how to get the activities
out of the bag without fractionation, #2
Finally, a B-29 tracked the
atomic cloud in an attempt to sample if all other methods failed.
On
ABLE Shot the B-29 attempted a sample several hours after the shot, but
the radiation intensity was barely detectable 3
After a look at the data back at Los Alamos, Mr. Rubinson made these
recommendations for future attempts to sample nuclear clouds:
If it is at all possible, samples should be collected
by the drone air filter method. These were our most
reliable samples, . . . It should also be important
to try to collect a sample about 2); hours after shot,
with precipitron on a B-29, in order to see if an
accurate efficiency determination is feasible with
such a sample,
ce
Operation SANDSTONE
-
The following spring, on 3 April 1947, the Tos Alamos Scientific
13
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SWEH-2-003),
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