6 Nov 1942
United States
United States
- Groves and Oppenheimer visited Los Alamos, New Mexico, United States and agreed that it was suitable as the location for Site Y for the Manhattan Project. ww2dbase [Operation Trinity and Manhattan Project | Los Alamos, New Mexico | CPC]
5 Apr 1944
United States
United States
- At Los Alamos, New Mexico, United States, Emilio Segrè received the first sample of reactor-refined plutonium from Oak Ridge, Tennessee, United States. He would soon discover that the spontaneous fission rate of this plutonium was too high for use in a gun-type fission weapon. ww2dbase [Operation Trinity and Manhattan Project | Los Alamos, New Mexico | CPC]
4 Jul 1944
United States
United States
- J. Robert Oppenheimer revealed Emilio Segrè's final measurements to the Manhattan Project scientists at Los Alamos, New Mexico, which concluded that the "Thin Man" design for a gun-type plutonium weapon was not feasible. ww2dbase [Operation Trinity and Manhattan Project | Los Alamos, New Mexico | CPC]
20 Jul 1944
United States
United States
- The staff at the Los Alamos site of the Manhattan Project shifted focus to work on the implosion mechanism for the atomic bomb. ww2dbase [Operation Trinity and Manhattan Project | Los Alamos, New Mexico | CPC]
10 May 1945
United States
United States
- Manhattan Project Target Committee met at Los Alamos, New Mexico, United States to compile a list of potential atomic weapon targets in Japan. ww2dbase [Atomic Bombing of Hiroshima and Nagasaki | Los Alamos, New Mexico | CPC]
21 Aug 1945
United States
United States
- At Los Alamos, New Mexico, United States, American physicist Harry Daghlian, Jr. of the Manhattan Project accidentally dropped a tungsten carbide brick onto a plutonium bomb core and received a fatal dose of 510 rems of radiation. ww2dbase [Harry Daghlian | Los Alamos, New Mexico | CPC]
29 Aug 1945
Photo(s) dated 29 Aug 1945
Photo(s) dated 29 Aug 1945
15 Sep 1945
United States
United States
- American Manhattan Project physicist Harry Daghlian, Jr., after receiving a fatal dose of radiation during an accident on 21 Aug, died from radiation poisoning in Los Alamos, New Mexico, United States. ww2dbase [Harry Daghlian | Los Alamos, New Mexico | CPC]
16 Oct 1945
United States
United States
- Robert Oppenheimer resigned as the director of the Los Alamos, New Mexico, United States facility of the Manhattan Project. ww2dbase [Operation Trinity and Manhattan Project | Robert Oppenheimer | Los Alamos, New Mexico | CPC]
17 Oct 1945
United States
United States
- Norris Bradbury succeeded Robert Oppenheimer as the director of the Los Alamos, New Mexico, United States facility of the Manhattan Project. ww2dbase [Operation Trinity and Manhattan Project | Los Alamos, New Mexico | CPC]
Timeline Section Founder: Thomas Houlihan
Contributors: Alan Chanter, C. Peter Chen, Thomas Houlihan, Hugh Martyr, David Stubblebine
Special Thanks: Rory Curtis
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