ae Sarsae BL ESWAR a 6 ego Pe MT mf elgg. Gry 8 perpeniieular te the plate. The lines of sight of the threes eallimator tubes passed through theee three extensions. Thirty-two pieces of 1/8 lead sheet vere cut eo as to fit over the front blast plate, leaving three holes for the lines of sight. The line of eight was of course not entirely clear, having to pase through the 3/8" steel blast plate as vell as 3/4° of B°°. . An old phonex collimator block which hat broken ints three pleces was used for additional shielding. One section was pleced om edge along eneh side of the station and the third section ws Ppleeed across the top of the collimator. Thia section was reteted throagh 90° so that it was flush vith the froat of the station bat projeeted about 10° over each side. The whole station was then omdunanttes. BEST AVAILABLE COPY Ta addition te extra shielding, tvo bar magnets vere fastened ene on each aide of the radiator so that the magnetic Meld between them waa perpendicular to the axis of the camera. Tt was hoped ly this method to reduce blackening of the plates ty Compton, elestrons. This method had teen shown to reduce blackening of amalstous tn phonex cameras at the Nevada Tost Site. 41) eemeras at the 300 yi. station vere equipped with these magnets. Purthermore, a twoim h lead plug was placed in the 1)” pipe in front of the top collimator tube, #0 as to reduce the gemma ray flux dow the collimter tube. Recovery vas made ty Allen, Prye ent two #4 NW men (Brennan ead Kaneshire) late in the afternoon of B-day. «Dicorter resovery hed_-«\ teen ed after a boon uted afterMBIMon), tue aftr (BLACKPOOT) 0 6 x 6 truck was landed fron a T-boet, The trusk carried a heavy recovery bax vith 3° of lead ehielding all around it, and epace inside for six phonex cameras. Reoovery from the, 300 yi, station was