"wh

AY

Brow)
Project 22.1 - Measurement of Alpha and Boost - L. F. Wouters

EXPERIMENTAL
The gamma rays produced by the sucleer reaction were detected by
fluor-photocell detectors locate? in a lead lined “doghouse” 890 feet from
the sero point.

A 27 foot lead pipe served to collimate the game rays

onto an array of four fluors,

The four fluors vere positioned in tandes

along the gamma path and vere observe’ by « total of three photodiodes
and four photomultiplier units.

Combinations of gama attenuators betveen

fluors and optical attenuators between different detector unite on the
same fluor enabled the attainment of complete coverage from the 3th
generation level to well above the peak expected farma signal,

The detector

outputs vere trangitted by cable to recording oscillographs located in
the blockhouse where cameras provided a permanent fils record of the signals.
In adtition to the “oghouse® detectors «a fluor-photomultiplier unit
logated two feet ‘rom the Jevice in the cab enabled individual neutrons
to be detecte? po that the initiation time might be determined.

BESULIS
The reaction history experiment wes successful in poamunipe the high

explosive transit time and the reaction rate of cee device.
yrapeit Tipe:

The high explosive transit time was measured to

to MIN«con tne raunit pulee to the tine of rise
Me

of the ENS neutron pulse.

Alpbe:

Preliminary reaction history results are indicated in Pig.

22.l-]1 an? 22,1-2.

Pig, 22.1-1 is a plot of the equivalent gama Mev

BEST AVAILABLE COPY
-ihe

quam

co)

Select target paragraph3