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APPENDIX "H"'
INCOMING TELETYPE
OCTOBER 16, 1957
FM UNIV OF CALIF RADIATION LAB LIVERMORE, CALIF
LASL, LOS ALAMOS NMEX
ATTN: N. E, BRADBURY
DMA USAEC, WASHDC
ATTN: A. D, STARBIRD
REFERENCE: TWX SWID 8767 NORTHRUP TO BROWN,
IN OUR OPINION A
DEMONSTRATION TEST CAN BE CONDUCTED SO AS TO AVOID REVEALING
FURTHER IMPORTANT DESIGN INFORMATION,
THIS WILL, HOWEVER,
REQUIRE SOME- PRECAUTIONS AND ALSO AN EFFORT TO PROVIDE
|
CONVINCING EVIDENCE,
WE ASSUME DEMONSTRATION DEVICE WILL HAVE TO APPROXIMATE
THE MAGIC NUMBER 96 PERCENT, WE ALSO BELIEVE THAT, TO BE
CONVINCING,
OBSERVERS WILL HAVE TO OBTAIN TOTAL AND FISSION YIELD
VALUES, THE LATTER EITHER BY RADIOCHEMISTRY OR ABSOLUTE
MEASUREMENT OF PAST SHOT GAMMA SOURCE,
THE NEED FOR CONFIDENCE
AS TO CLEANLINESS LEVEL REQUIRES SHOT OF SOME PRE-TESTED DEVICE
WHICH MUST EITHER BE LIKE NAVAHO OR A REPEAT OF SOME HARDTACK
,
MODEL.
AND THIS MIGHTITSELF BE DIFFICULTINTHE YIELD RANGE WHERE
HIGH CLEANLINESS MAY BE AVAILABLE,
ABSOLUTE MEASUREMENT OF GAMMAS APPEARS LESS DIRECT. AND
HARDERTHAN RADIOCHEMISTRY.
THCUGH IT REVEALS LESS INFORMATION ©
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Appendix "H"