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Machine-read from the scan, so expect some errors. Lines that couldn’t be read are left out.
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1.3 Cloud Samplingon Mike Shot .............. l-5 3.3 and 3.4 Hot-epot Obeervetion and Bomb Case Motion ... 3-13 4.1 Slow Neutron Observations................ 4-2 Shock Wind, Xteruind, and Sound Velocity ...... 6-3
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Underwater Pressures as f(t) end Peak Water Pressure _ -l’?“- Propagation of Seismic Waves ............ 7-5 Trampohxtion of Airborne Debris .......... 7-5 Detection of Fireball Lights at Distances ...... 7-5 Thermal Radiation Measurements by NFL ............ 8-2 8.1 Integral Thermal Radiation Meeearements ....... 8-2 8.5 Thermal Radiation as f(t) in Free Air, Utilizing gation of Radio Waves ................. 9-4 9.3 Measurement of Effect6 of an Atomic Exploelon on 9.4 Evaluation of Indirect Bomb Damage heseeaaent
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mi13 program ua8 concerned with the measurb3nt of the gamma rey intensity as a Punction of time arxi position, tame. The close up work, under the direction of largely diagnostic, and proposed to determine th8 including that duo John Kalik, urn two min reactions, ax-d the fission yield. The more distant wor’k uas concerned largely with fall-out, and u-as conducted by Harold
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GAMMA INTENSITYAs k FUNCTION OFTIME The gamms-ray intensity vB time with a time reeolutioa of 0.1 peec ~88 recorded at a blockhouse on Ruchi 2500 yde from ground zero, uelng 8 system of ecopee with linear sweeps ranging from 3 peec to 1000 Psec Gaw inteneity VB time qeasuremcnte vith better than nlllisecond reeolution,us- strip film unite ~~lng for eeveral eeconda, vere attez@ed at etatiom on San 11 de Fonso (1200 yds), Cochitl (iBoO yde), md Bogombogo (4300 yde) to supplement the etrlp film data of the blockhouse aa to tie Lime dependence of the total doee and the effect8 of the shockvave upon the gam~~ radiation. The near stati& va8 at the edge Of the crater and hence wrecked; the etation on Cochiti loat the protective Plue a dual strip film unit deeigned to give data for about 30 Bet. on the strip-film .unite up to shock arrival, vhich broke through the r dcxzeeprotecting the detectore. dtxe permitting the ahock uave to wreck stetlm gave deta down to about 30 ,.#ec shovingthe pronounced influence of the the record- unit. The Bogozbogo and lasting for ame second6 shock uave on the go radlation--
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lhe level rlelng aftar shock arrival to 8 factor of 50 above preahock egreezlectwith celcxlated valuee. indicate a total of 3 x 103 no18 of ne;ltroneware Both nwzbere are very rough a:_rlcethey involve vorkiq back through a large mount of air aabjacted to e etrong ijhr)ck vith u&:lczn loading. An integration of the Zogozbogo data, making a gdeae as to the Figire 5.2-l and 5.2-2 are plots of the g--rag lntemity
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GAMMARAY INTEXITT VSTIHE Gamma-rayIntensityveraus time detsctorewere placed in operationon the followingislandsof placed on Bikini, Ku8aie, on Bogallua,Ruchi anl Bogon Islandswere destroyedby blast and thermaldamage. Accordingly,no data are forthcomingfrom these Land-linetelemeteringfrom Engebi to Parry was installed but the line did not survive the 8hOL Bogonwad plannedbut an inadequate Parry,Eniwetokard Rigill. Thus far no data have been recovered fromthe off-atollstation8althoughsop13fall-outhas been recorded Inclrrledherein is a plot of do88 rate ver8u8 time for Engebi, BiiJiri, Rigili and Bunit (Fig. 5.3-l). The data plotted are pre; lininaryin nature in so far a8 the ab8olutemagnitudeof tb dose rate i8 concernedbut are well within a factor of two in accuracy vith the exceptionof Engebi ubre the ionizationchamber sust&ned4
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e dsmage which has altered the sensitivity of the chamber. The decor iate a~ plotted arYl calculated are judged to be accurate dab plw or minus ten percent. The decw rates indicate the e i&sument; !k/hp to 51 lrr/hx has been recordedon Eniuetokand prrry. No data are reported for Aniysaniia8 the motor of the recorderfailedbefore shot time. The scatter of points for times in excess of nine houra in romeuhat greater than would be expected for a continuousrecording system.It is hoped that a rnwe detailedstudy may resolvean . dditionalcomponentof the decay scheme such as an exponential lactca.This vould give rise to a general eqxession for the decq
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FAILOUT DISTRIBUTION2RD PARTICLE SIZE The objectivesof the experFPlenthave remained unchanged 1 and are essentiallyas written in the TurquoiseBook, The method ! and proceduresvaried slightlyfrom that outlinedin the Turquoise (a) The Type A collectorshouldbe called a total collectCr ratherthan an integratingcollectoras it was called on page S.ha.3 : z+_ ratherthan greased plates. collectorsuere installedat Bikini and Kwajaleln, shipa: Rendova,~Eates, Curtis, Leo, Oak Hill, Agawam, Carpenter, stationsthese papers uere changedeach twenty-four period of H-T.day to about X+7 days. On board ship On the island hours during the collectorswere changed each 12 hours arriwere placed at a height whichwould have been above the washdawn system* If it had been
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a flask) and Type P Igum paper) collector6were mountedon Navy dan 'F,;r.- buoys. In order to make locationof the dan buoys eaeier, a ~~-138~ z~.i-.-. . cornerradar reflectorwas mountedat the top of the dan buoy staff. planned,was to ring EniuetokAtoll, except for the by the ships,with buoy6 80 positionedas to be at a distan& of 30 miles from the shot islandat H Hour. 'Also plannedwere two arc6 of buoys in the pretiicted.upperair down ti sector (i.e., be placed in such a manner that t&ey would drift to 100 mile6 from tfie ahot island at H Hour; the secondarc was to be positionedat 150 milelo 2. tiE& OF SUCCESS OF THE EXPERIHEM or the eight land stations,Bogallua,Engebi,T&i, Piiraai, ard Runit zero within the fall-outarea and, at all stationsexcept differential solid fall-out collectm, was triggered by a "BlueBox" i of our own design, On Yafrl, Runit,Aniyaaniiand Eniwetok the "Blue
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the buoys I&;' also~&&g it ia aaaumed that failure a storm; -*our more rafts broke loons. On checkingit cut by the rire cable about four feet fromthe buoy. The Une,' aa t ; raft swung, apparentllyworked its way up to the "VW &ere the cable ml8 clampedand was cut due to the heavy working of the raft during the &mu. Tvo of the four that broke loose lodged on the reef be_ixeen bgillua and Riglli and were atill there after the shot. Tocorrect on H-2 day. On H-day, 14 of the 20 originalrafts were in position,, OF approximately80) since the tuo lodged on t5e reef uere within + were recovered. The "Blue Box" on all rafts triggered. AU of the rafts recoveredwere within the fall-outarea and it Is believed*that excellentaarnpleswre obtained. One of the rafts was at 5 miles from Elugelaband anotherua8 63 tilea. These rafts suffered mm blast axrl The first casualtyto the dan buoy sea stationsvaa an
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sampleshave not been recoveredas‘of the date rep no difficultiesare arrticipatbd. Since no analysisof the fall-outsamples'Gasconduc cements and conclusicm can only be verg gcncrdl~'-All collectcdat Eniuetok were placed on the & Easy ktra s*.. aanplee will ;bc analyeed et the U. Si Naval Radioi~gical'Def~I;se.~Labl that, the majority arrivedin the fmn of small round spheres. The spheresvary in size :fkoma pin point to about l/16 Inch in diameter. They are white and will usually shatterat the touch. Some_oi them appear to be hollow and others appearto have concentricrings. They are insolublein water and are very tightlystuck to the surface.on which they landed. Their tenacityis illustratedby the fkt that two of the rafts were towed acrossthe lagoon from a positionnesr plowingunder water for the entiredistance,'tk sphzrcewere not disraft platformwas constructedin such a manner Umta 2 x 6 board was coveredby a 1 x 6 board with a gap of l-J/&"bet&en thca,~ One of
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It ia not only on the top of the 2 x 6 but ia on the undersideof the 1 x 6. Vertical surface8of the spacer8al80 show the Spherea. In orderto have penetratedthe aforemntionedgap the fall-outmust have arrivedeither in 8 rolling action,or with a driving force acting almosthorizantally. Another interestingnote uas that the particle8 8eemto have clung just a8 tightJyto the slofacdof a wooden grating whichshould have been below tlm was on tb undersideof the raft water at all tims. This grating arxiform8 a platkorminside the raft Figure 5.4a-1 Is a print of a radioautograph,made by placinga 4..., pieceof tri-X film wrapped in black paper on the surfaceof the 2 x 6 and leaving it there for a period of 15 Lutes. The print clearlyillustratestha generalnature of the distributionof the tivelyblocked out most of the film. This double sectionvery effechave been more heavilyconcentratedon the and extmded dovn to at least15 miles. to prove the operationalfeasibilityof such a scheme,i,e, could they be found after driftingfree for severaldays. It is belhved that the successfil r&zovlery of 635 of the buoys definl.tely.provesthat such a schemais feasible. Improved8aa an&m connectionsshould increase the recoveq percentkge. All of the buoy8 except ona which on recovery
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obscUred by eurface contamine Current report8 from Washington, D.C., indicate that eix etatione receivedetrong eignele, one station fair, one etation queetioqsble, .... t= _-. I it ie believed that the negative result from this station wae due to It h@ aleo been reported that home Coaet and Gaodetlc fb’V837 selemicetatione have reported positive Bigtxile. locationa are not currentlyavailable at thle headquarters. D&e were obtained to determine cloud height end movement after that criticalevaluationof all data will yield the noet probailehei& NL RC ad path of the Mike cloud. .~-. Ro res&ts of this &og& iz evei&e at ihie tti.
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altitude unleee othemlee epeclfled. Intensity on ground wae roughly four times air read +.(, Theee number8 should be coneidored with caution since. they were taken under verg adveree ditione and aleo are, in sane casea, interpolated. M repreeente the day of Mike Shot. , pa’::