atLerte= ae poe
weltFt.
aSee Loe er
oeee
a nee et
20, Highlights of the second necting, held in Albuquerquey
September 15- 7; are set forth below.
21k We providea the Settish
#
ith blueprints, material specifications, and velévant theoretical and experimerital information
related to our XW-47 warhead; Mark 28, ih, is, and ke warheads}
and the”
BELElED
‘for our TX-41 and TX-46 weapons nol under
development,
2e. The British provided similar information on their highyield fission bomb, now in stockpile; 2,200-pound thermonuclear
bomb; small
eceerep
device; two boosted fission designs; -
planned 1,500-pound thermonuclear weapon; and proposed 6-inch gun
device,
23. Both parties discussed in detail neutron sources for
initiators, high explosive specifications, yields and designs,
and mechanical and electrical components.
24. We have several observations resulting from these meeting.
The British have performed experiments in
i
and their program in this regard approxima’es
Looebt
our own experiments of 1954-55,
They have tested radiation-imp1o-
Sion, two-stage devices corresponding to our state of knowledge
of about 1954-55.
me
ee
tal
They fully understand the advantage of the
land their state of knowledge is about the same
Lo pebsaz b ba
or somewhat better than ours of 1956,
they do not have the
In regard to initiators,
ears
initiator, but
have proceeded toward developrent of en external neutron source
of initiation.
These sources,
eae
FryETED
In high explosive
7 development, they have devised
-15-
at
Part Itt