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4.5.3, Alpha Measurements
General.
On Operation Hardtack, EG&G performed reaction history
measurements on nineteen devices: fourteen detonated as part
of the Los Alamos Scientific Laboratory test program and five
detonated as part of the University of California Radiation
Laboratory test program.
These measurements included alpha
vs time throughout the required portion of the measurable
history;
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_
Originally the alpha effort was planned for nine LASL
experiments; however, LASL added several shots, and late in
the operation five UCRL shots were moved from Bikini to
Eniwetok.
Thus EG&G was requested to employ its existing
instrumentation on eight additonal shots.
The complexity of
the measuring system varied from experiment to experiment,
depending upon the diagnostic requirements of the laboratories
Table 7 indicates the amount of instrumentation for each shot
and the extent of the reaction history measurement.
Instrumentation.
Except for surface shots Koa, Quince, and Fig, all devices
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on which alpha was measured were detonated from barge locations.
On seven tests, EG&G mounted detectors at the ground
zero location and recorded the complete measurable reaction
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