How did the world’s first atomic bomb get its name?
August 29, 2022
The world’s first-ever atomic bomb is called The Gadget.
According to the longtime lore, the bulbous-looking Fat Man bomb’s name was inspired by British Prime Minister Winston Churchill. After the Thin Man bomb, whose moniker was inspired by the U.S. President Franklin Roosevelt, didn’t come to fruition, the gun-type uranium atomic bomb named Little Boy was developed. It was likely dubbed as such because it was smaller in size.
But how did The Gadget get its name? Was it a codename? Just a nickname? A tribute to being the first?
Many Los Alamos veterans, including historian Ellen McGehee, retired scientists Bill Archer and Glen McDuff, and staff of the National Security Research Center (NSRC) recently looked into the origins of The Gadget’s name.
As it turns out, Director J. Robert Oppenheimer suggested using the term as work began at the Laboratory.
The term “gadget” was commonly used during the 1940s to describe experimental scientific and engineering devices.
The Gadget versus a gadget
At the April 1943 Los Alamos Primer Conference, physicist Robert Serber used the word “bomb” as he began his now-famous lectures. According to Serber, this prompted Oppenheimer to take action: “After a couple of minutes Oppie sent (physicist) John Manley up to tell me not to use that word. Too many workmen around, Manley said. They were worried about security. I should use ‘gadget’ instead.” The term “gadget” was commonly used during the 1940s to describe experimental scientific and engineering devices.
Because gadget is a generic term, it was applied to multiple weapons types during the war and not exclusively to the Trinity device. For instance, records in the NSRC refer to “the gun gadget” (Little Boy) and “the implosion gadget” (Fat Man). In most cases, though, the term applies to the imploding bomb.
By the summer of 1945, the concept became reality when the Trinity device was tested. At the time, the Trinity device was the only nuclear weapon in the world – quite literally The Gadget. As such, it would be accurate to refer to Manhattan Project-era weapons designs (including gun-type devices like Little Boy) and also implosion systems (like Fat Man) as gadgets, and the Trinity device as The Gadget.
Also noteworthy, the name Fat Man is used as a term for both a type of weapon as well as the specific weapon detonated above Nagasaki, Japan, on Aug. 9, 1945. 🔎
