Project 12.2 - Phonex = D, Prillips
The phonex experiment as described in GREENHOUSE Report wT-68 was
performed at two nuclear explosions during Operation REDALNG.
(HKRIZ) shot there were tro stations (300 yds. and 600 yds. from ground
zero) looking throush holes in the J-13 shield.
Two stations (450 yds
and 750 yds. ) were eliminated a few days before shot time.
The reason
for this was the dzinzer of lip seattering by hydrogen in the ccncrete
anc paraffin shield as pointed cut py Louis Rosen.
To alleviate this situetion, the aperture
recuced usinz heavy material,
through the shield vas
In the case of the 300 yd. station, the
line of sisht pussed alons a 3" I.D, transite pipe through the shies d.
This pipe wes lines vith steel tuoins 21" long, 2" 1.D., and 2" wa
thickness,
Tue lines cf sizht to the other stations 411 passed throuzh
an operninz of rectunzuler cress section ezhout 6" x 10",
Tivo steel
tubes aprroxvinately 30" lonzt, 2)" 1,9., 2" wall were cut and hard soldered tozether in such a way thst one could te placed along the line of
sisht to the £00 yd, stution and the other along the J-13 line.
rest of the space through
The
the rectangular aperture wes filled by pack=
inz it with about 136 lbs of lead wool,
sivht to the 450 yd. and 750 yd, stetions.
Tnis elininated the lines of
However, it should have
materially reduced the number of neutrons scettered through small anzles
by hydrogen and then passing elonz the line to the 300 yd. and 600 yd.
stations.
Both stations were heavily send bassed, particularly the near
stetion.
At this station, extra shielding in the form of lead wool was
placed on top of the collim-tor and in front of the forward blast plate.
a
4"