Wikileaks Releases Early Atomic Bomb Diagram

An anonymous reader writes "Wikileaks has released a diagram of the first atomic weapon, as used in the Trinity test and subsequently exploded over the Japanese city of Nagasaki, together with an extremely interesting scientific analysis. Wikileaks has not been able to fault the document or find reference to it elsewhere. Given the high quality of other Wikileaks submissions, the document may be what it purports to be, or it may be a sophisticated intelligence agency fraud, designed to mislead the atomic weapons development programs of countries like Iran. The neutron initiator is particularly novel. 'When polonium is crushed onto beryllium by explosion, reaction occurs between polonium alpha emissions and beryllium leading to Carbon-12 & 1 neutron. This, in practice, would lead to a predictable neutron flux, sufficient to set off device.'"

Comments

Sounds like a short-lifed design

[Lonewolf666]

"When polonium is crushed onto beryllium by explosion, reaction occurs between polonium alpha emissions and beryllium leading to Carbon-12 & 1 neutron. This, in practice, would lead to a predictable neutron flux, sufficient to set off device."
Wikipedia gives the half-life of the most commonly used Polonium isotope with about 138 days:
http://en.wikipedia.org/wiki/Polonium
This may be fine for a bomb that is to be used shortly after manufacture, but not for a warhead that is supposed to sit in a missile silo for years. Of course, the USA wanted to use the bomb on Japan, so long-term storagewas not an issue ;-)

Novel?

[deglr6328]

What exactly is so "novel" about the description of the neutron initiator? This design of the "urchin" has been known for decades and hasn't been novel since the 50's. No one even uses them anymore due to unpredictability, all implosion weapons use pulsed neutron generators based on fusion of deuterium with tritium. If anything, the document merely serves to confirm that we've been right about our ideas on how the thing originally worked.

Home made atomic bomb

[OzPeter]

Back in the mid 70's, Electronics Australia (hobbyist HAM radio and electronics magazine - now defunct) did a mock project that showed you how to make a non-portable atomic bomb. The design was based on firing a large uranium bullet at a uranium target. The target was encased with several tonnes of concrete in order to contain the critical mass long enough for an explosion to occur. In the article they talked about how construction of the bomb would basically kill the workers, which at the time seemed stupid, but in these days of suicide bombers seems reasonable.

the secret that exploded

[peterxyz]

for all of those complaining about the publication of this, you're about 30 years behind the times.
In a high-profile First Ammendment case Howard Morland and the Progressive tried to publish Fusion-bomb (aka "Hydrogen bomb") design details in 1979. The government eventually dropped its case

Here's the book; http://www.amazon.com/Secret-That-Exploded-Howard-Morland/dp/0394512979
and a background artcile by Howard on his deductions and something of the legal case http://www.fas.org/sgp/eprint/cardozo.html

oh yeah - even Greenpeace seem to have pretty pictures - wouldn't trust those guys to assemble one though http://archive.greenpeace.org/comms/nukes/fig05.gif

peter xyz