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Al
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F4ATICUAL ARCHIVES
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ADMINISTRATIVE
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Yage 3- Mr; C. L: TyleIr
- August11, 1947-
1
,lo
It is stzphasizad
that all photogr~~ shouldbe from groundmountedcameras.
TheLos AlamosLaboratorywill supplya few individds as consultants
to
thisoperationif deslridtle.
It ie extremelyimportcntthat there%e at leastmicimal
obenervations
of prestie end blastfrom each detonation.The Los Alamola
Laboratorybelievesthat eithertheEoreauof Ordnanoeor AMW Ordnauceis
far more qualifiedthanLos Alaaoato reoozzzend
and oonducta progr~ of
blastmeasurement.The erperianoe
g tdnedby the Bureauof Ordnanceand
theirexcellentresultsat Bildniaaggestthatit nuuldthereforebe
&esiirable
to make arrangements
with theBureauof Ordinance
ta supply
appropriate
snsoior
end Juniorpersonnelto theTeohnioalDireatorto formulate
and conduot,upn raoeiptof approval,a programof blast memament.
At
the presenttime,it is thou@t thatminimalobservations
wouldincludeOEJY
selfrecosdingdeformationtypesof blast gages. However,thO dtisab~i@’
of inoludingds@cea whichwill givepreesureas a functionof time in the
shodcwave and shookwaye velocityshouldbe sefiouslyconeider~
1
12
I
Thereexistsa numberof teohnicalobservations
whichmi@ be
made in connection
with the gammaradiationemittedby the titonatingatomic
weapon. The simplestof thoseinvolveeplacing8hida8d fIlm at mrioua
dietencesaxi undervarious00nditions
of shielding in the vicinityof the
bombs. F’mm the de~ee of hlaokening,
one ~
obtainsome information
as
to epectrumand integratedintensityat eaohlocationi Sinoes- a
measurement
has primaryradiologi
o&l healthaignif
icwce, It is proposed
th@ m.oha measurement
be conduoteiby the radiological
ede~ .kzrouP
as a
teahnic.doperationin acblition
to their.ftznction
as a healthsafetyorganizati
Thisteohniceloperationwould oomeunderthe specificdirectionof the !laohnio
Mreotor whereas theirhe~th safetyfunotionswild comeunderthe Atomic
tir~ Oomnisslon
Direotoro In the eventthatit seam more desirableto
conduotthe film operationdireotlyunderthe !l%ohnical
Direotor,the LOe
Alamoo Laboratorywill investigate
the possibilityof obtainingunder oontraot
the serviceeof Dri OerhardtDessof the Universityof Rochester,and
staffto conduotUs measurement.
13
There exietsanotherrtiation meazurmmsnt
whiohwouldb e destrdle
to conductbut whichpresentsmuch more formidablediffioultiesiThis deals
with the speotroiz
of the ait ted radiationas a functionof timeand ie
particularly
conoerned
with the verypenetrating
radiationobserved
at
Cmesroadsi
TIUSLos Alamos Laboratorywill invest%
ate thef eaeibility
of
conductingthis e~eriment eitherwith our personn~ or withpersonnelunder
However,theLaboratory
wouldwelcume
direotcontraotto tie)iaboratorgg
suggestions
as to my possible~enog of the Arnw,Navy,or publichealth
eervicewhichmightbe competentto oonduotthisr atber tiffid.t measurement;
14
The Lao AlamosLaboratoryfeelsthatmeasurements
of therate
and time at whichneutronmultiplication
occursintheweaponat the start
of the ohainreactionare teohnicalobservations
of the highestimportance
particularly
In the uventthatotherthanthe anticipated
b ehavior of the
succeseftlly
at Alamogorde
weaponom.u% 9Ms measursmnt was accomplished
but only withthe ~eateat cliff
icultyand the meet skilledand senior
persomnel~The Los AlamosLaborato~will investigate
of
. the possibility
,