= piennn —]|—_—_— ~ * PROGRAM 13 Project 13.1 = sniwetok Alpha = Bob Patten - EG&G Grier has mentioned the participation of BG&G in the alpha program; I will elaborate on this. Project 13.1 is the participation for close-in measurements of alpha at Eniwetok and Bikini. We have two large blockhouses; one is located at Eniwetok on Runit (Yvonne) and the other one is located at Namu in the Bikini AtolL., Three shots will take place on Runit; Erie, Blackfoot, Lacrosse I. One shot, Cherokee, will be at Bikini. The Runit shot is a straightforward alpha measurement which consists of detectors located up in the tower cab, base of the tower and along the line back to the blockhouse. On Runit we will have anaverage of 10 detectors and28 oscilloscopes for each of the three shots. | DELETED VELA SELES 1. \ \ The two types of detectors which will be used are photomultiplier detectors, the scintillation photomultiplier unit, and the coaxial photoediode detectors, These send signals down the transmission lines into the blockhouses, and into three basic types of oscilloscopes. We hope to try out a new type of oscilloscope to increase the range of our measurements in each detector so we can cover a factor of 20,000 with one detector, The main problem we have at the moment is the one on Nam which is a measure- ment of the alpha of the first stage of the gadget. Now, alpha is a measurement of the rate of reaction or the rate of rise of the neutron reaction. We measure this by detection of the gammas from the bomb. On the Namu air drop, the 5,000! altitude is based primarily on whether we can detect the primary gammas from the reaction. The fireball is expected to come down and almost touch the ground, so at the moment the best place for the station, from an experimental standpoint, is right at GZ. The station will be a small station at GZ which should take the blast, we hope, and we hope to recover data from the station. Recovery of data will depend on how well the reaction takes place. If the bomb goes as expected, data will not be recovered immediately. If it doesn't go as expected, a quick recovery is under consideration. On Runit, the station is standard and no problems exist there e Herb Grier has already mentioned the participation of the BG&personnel which will be shifted around for the various projects. Project 13.2 - Remote Alpha (Scintillation) = John S. Malik = LASL 13.3 = ENS Measurement Most of the field work of Program 13 is done by EG&, Bob Patten in this particular ca:e., Measurements in this operation will be more than the usual straight alpha measurements in that we also intend to, in most cases, go up over ‘