Description of document: Title Pages of (four of the) Five Oldest Still-Classified Documents in the Los Alamos National Laboratory (LANL) Research Library (as of May, 2008)

Requested date: 02-May-2008, 02-May-2008, 03-May-2008 Released date: 16-September-2008 Posted date: 02-October-2008 Date/date range of document: Various dates in 1943 (some items undated) Source of document: Source of document: Department of Energy

National Nuclear Security Administration Service Center P.O. Box 5400 Albuquerque, NM 87185 Freedom of Information Act U.S. Department of Energy 1000 Independence Ave., S.W. Washington, DC 20585 (202) 586-5955 FOIA-CENTRAL@hq.doe.gov http://management.energy.gov/foia_pa.htm

Note: See release letter for information about aggregated FOIA

requests and a list of all five oldest still-classified LANL documents

The governmentattic.org web site (“the site”) is noncommercial and free to the public. The site and materials made available on the site, such as this file, are for reference only. The governmentattic.org web site and its principals have made every effort to make this information as complete and as accurate as possible, however, there may be mistakes and omissions, both typographical and in content. The governmentattic.org web site and its principals shall have neither liability nor responsibility to any person or entity with respect to any loss or damage caused, or alleged to have been caused, directly or indirectly, by the information provided on the governmentattic.org web site or in this file.

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National Nuclear Security Administra~on

Department of EnergyNational Nuclear Security Administration

Service CenterP. O. Box 5400

Albuquerque, NM 87185

CERTIFIED MAIL - RETURN RECEIPT REQUESTED

This letter is a partial response to your three Freedom of Information Act (FOIA) requeststhat we aggregated in to one (1) request. You requested on May 2, 2008 a copy of thetitle page of the five oldest still-classified documents at LANL (excluding documents inthe LANL Research Library), on May 2,2008 a copy of the bibliography of still­restricted or classified LANL historical reports and a copy of the title page only of eachstill-restricted or classified LANL historical reports, and on May 3,2008 a copy of thetitle page of the five (5) oldest still-classified documents held in the LANL ResearchLibrary as determined by the library catalogue, or alternately a printout of the list of thefive oldest still-classified documents held in the LANL Research Library.

I contacted the Los Alamos Site Office (LASO) that has oversight responsibility for theLos Alamos National Laboratory (LANL) about your request. LASO asked LANL tosearch for the requested records. LANL searched at the LANL Research Library and thestaff at the Library advised they no longer handle classified reports; the classified reportsare in the LANL Records Center. With this informatidm, LANL contacted the RecordsCenter and the five oldest still-classified reports were located. The reports are:

1. LA-00002, cover and first page, The Los Alamos Conference, Report ofthe FirstMeeting on April 15, 1943;

2. LA-00004, cover and first page, First Los 'Alamos Conference, Post-ConferenceDiscussions, Week of April 27, 1943;

3. LAMS-000I4, cover and first page, Memorandum to Cap. W. S. Parsons from D.R. Inglis, dated September 28, 1943, Subject: Sudden assembly oftwo diffusemasses compared with two dense masses;

4. LA-00022, cover, Neutron Multiplication during the Uniform Expansion ofaTamped Gadget, September 1, 1943; and

5. LA-00026, cover and first page, Critical Radii ofLong Cylinders, October 16,1943.

2 SEP 16m

Enclosed and responsive to your three requests are the requested records for Items 2through 5 above. Item 1 is not provided as the cover and first page of the document arestill classified today and would have to go through two reviews for release. As you knowthese reviews are very time intensive and can result in receiving at the end of the reviewslittle more than page numbers. Before we continue the review of the cover and first pageof Item 1, please let me know if you want us to continue this process for release withinten days of your receipt of this letter. If! do not hear from you within this timeframe, Iwill consider your request satisfied with what is provided in this letter and will close myfile.

There are no charges to you for processing your request.

If you have questions, please contact me bye-mail at cbeckne11@doeal.gov or write tothe address on the first page. Please reference Control Number FOIA 08-165-C in yourcommunication.

Carolyn A. Bec 11Freedom of Information Act OfficerOffice ofPublic Affairs

4 Enclosures

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AL.::JW3 CONFERZNCE

Week of April 27, 1943

Post-Conference Dis~~ions ~p.,-~__~ _

, '" ,.: I fOf" /dat t.. oniy1at revlew r s, atu. I Cl' 1 i'L.-.roI"- SA, __IJ.!.A-.--.,

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Derived From. ~-- So roe DocUment and Date)(GUld or u

4. ) I:o,uipInor.. t for J.. h;l d r~()8 s urcmo!l.ts, GUC h as rcmot e controland inc1icatio'1 (:oviccs for obscrvir.c results of critical exper­irnonts .

Classification of instrtun.ont~,tionwas f,1J:lde cs follm'!s:

1. Spocial TecIDligu0s and Equipment-- Mc Millan,

I. Discuss ion by Mc Millan

.5.) Squipmcnt for ordncnce II1,.;Gsur0Ir.ents.

1.) Equipl!lCnt built IJy individuals for their o':m usc.

2. ) A group to bL~i Id equipment for .general usc in 1r. bora tory .

. 3.) StaadcTdizL.<tio!l. r-:ro'lp to propClro, acquire, and cure forstandards, ,:In<l be res... oi1s:Lbla for thoir 9roper usc.

It V'CS rocoffi!ncmdod tl'.at croups be sc t u.! to tate c:..tre of.2.) and 3.), to bu 11l;,1ded by 5'roJ11an 2nd L~r..0ly respectively-.Group 2.) is not SL~!ipos(.,(l to int0rfuro v,-it!l or rc.Gtrict 1.),but it is CX9'jctccl tha t cvc,r,:Guslly it ':.'111 t;",l{(; over ", ,::;oodsh~rc of the work thlt ic n~~ un~er 1.), rclievi~g tho ro-se '.1rc h group s of some :yt' t h ..., ir load. GroL~p ~~.) "\vill In vc; adouble function: to design, impr~v0, produc~, 2nd stond~rdizG

mcasurine. Ot~,uipmcnt; "'Iud to build cqui!')ror:.t ;Jrd0r~ d by researchcroups to the ir ::;~~x: cificatj ons. Gro~I~s 2.) end 3.) will bocxpuctsd to work ~n very closo C000CrGtion.

Tho question of space for thos~ t~o srorp3 ~as considered,vlith the c oncensus of opinion the.. t roons 0-13, 0-14, ;:.;nd A-15should be r(;lol:,sod "'rOLl .'Ires, nt ;":,:'·siznrflcr.ts for their usc.

Bechor \'/8 s l1oI!lcd provision21lj-r to huod Group 4. ). T!lcroVF"',S no di sc ussio!l of Group 5.)

After tho mCoJtins, From.<:n c~nd ";'"ldI:l.-:ln m~A(; tcntntivv es-r.timotes of the 9crsonn01 ,-,nd SP0CC roqu:irtJd for their grou.ps.Those rGcommf;:ld.:~tions wc;ro consi(lcrcd b("' the committr:o :;t ashor t ffi0G tin.c; .:J. ftcr lunch, L.nd the f i.nul reeo mw.::nd.J tions 81'0

conts.incd. in tllC ;lttQchod rODorts. Thos'; ':icr(, cpprovcd by t os~_

attending the rocord rr:..oti.r:g. C1assificat\O d\ang to: ' :Jl AOe/ADO, o.

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THE ENEIVIY ':JArTS THE INFORi"lATIOf\l Cm:TAU.ED U. THIS DOCmL~;T.

Dm IT LZT Hr;'~ GST IT THROUGH YJUR t,ii:GLIG~I\CE.

FOR REFERENCE

NOT TO BE TAKEN FROM THIS ROOM

CAT. NO. 1935

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IS-4 REPORT SECTION

L A REPORT 22

This is copy _ of~ copies

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September 1. 1943. This document contains -.::..-. plges

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WORK DONE BY:

Paul Olum

NEUTRON MULTIPLICATIOn DURING

TIlE UNIFOIUl EXPANSION OF A TAMPED GADGET

REPORT WRITTEN BY:

Paul Olum

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LA REPORT 2~

This is oOPY 2 of~ copies

Ootober 16. 1943. This document contains. -!! PS&~8

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CRITICAL ~~DII OF LONG CYLINDSRS

LOS ALAMOS EDITION; This edition (Copies 1 - 10)contains Parts 1 and 2. The abstr at to Part 1is found on pa~a 2. and the ~!J~traot to Part 2is found on p~e 190 Part 2. which deals withapplications, has been omitted from the distrib­ution edition (copies 11 - 20).

WORK DONE BY: REfORT WRITT~N BY:

V D. Inglis D. Inglis

he: t J.:..

• au ..lor ze~o j4m1n1strativQ an4 Cr1~ir~1 Sanotions.

This work was done under the general supervls~on ofdiscussions have bean enjoyed also with S. Franke1~

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