Attention Deficit Disorder Prosthetic Memory Program

Demon Core

ADDPMP358
Demon Core - © Attention Deficit Disorder Prosthetic Memory Program

The demon core was a spherical 6.2-kilogram (14 lb) subcritical mass of plutonium 89 millimetres (3.5 in) in diameter, manufactured during World War II by the United States nuclear weapon development effort, the Manhattan Project, as a fissile core for an early atomic bomb, that was involved in two criticality accidents, on August 21, 1945, and May 21, 1946. The core was intended for use in a possible third nuclear weapon to be dropped on Japan, but when Japan’s surrender made this unnecessary, it was used for testing.

It was designed with a small safety margin to ensure a successful explosion of the bomb. The device briefly went supercritical when it was accidentally placed in supercritical configurations during two separate experiments intended to guarantee the core was indeed close to the critical point. The incidents happened at the Los Alamos Laboratory in 1945 and 1946, resulting in the acute radiation poisoning and subsequent deaths of scientists Harry Daghlian and Louis Slotin, respectively. After these incidents the spherical plutonium core was referred to as the “demon core”.

Organisms Named After Famous People - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP424
Organisms Named After Famous People
Yellow - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP577
Yellow
Tanzanite - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP252
Tanzanite
The Decline of Western Civilization - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP396
The Decline of Western Civilization
Plants In Space - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP551
Plants In Space
On The Art Of The Cinema - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP172
On The Art Of The Cinema
Catatumbo Lightning - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP560
Catatumbo Lightning
The Raven Paradox - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP353
The Raven Paradox
33 Thomas Street - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP339
33 Thomas Street
Moving Sofa Problem - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP487
Moving Sofa Problem
Philadelphia Experiment - © Attention Deficit Disorder Prosthetic Memory Program
ADDPMP461
Philadelphia Experiment

You are using an outdated browser.
Please upgrade your browser to improve your experience.