US DEPARTMENT OF ENERGY / SCIENCE PHOTO LIBRARY US DEPARTMENT OF ENERGY / SCIENCE PHOTO LIBRARY
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Berkeley cyclotron physicists. Meeting of US scientists on 29 March 1940 to consider the feasibility of the 184-inch cyclotron (diagram on blackboard) at what was then the Berkeley Radiation Laboratory, Berkeley, California, USA. Over the following two years, this would become the S-1 project, and then part of the Manhattan Project, helping to enrich uranium for use in the atomic bombs used in World War II. Present here (left to right) are: US physicist Ernest O. Lawrence (1901-1958), US physicist Arthur H. Compton (1892-1962), US engineer Vannevar Bush (1890-1974), US chemist James B. Conant (1893-1978), US physicist Karl T. Compton (1887-1954), and US physicist Alfred L. Loomis (1887-1975).
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