Ernest Orlando Lawrence was an American physicist who received the Nobel Prize in Physics in 1939 for his invention of the cyclotron. He is known for his work on uranium-isotope separation for the Manhattan Project, as well as for founding the Lawrence Berkeley National Laboratory and the Lawrence Livermore National Laboratory. The Nobel Prize in Physics 1939, announced November 9, 1939. Ernest Lawrence, “for the invention and development of the cyclotron and for results obtained with it, especially with regard to artificial radioactive elements”. Ernest Lawrence: born 1901, Canton, SD, USA. Wiki link Data: the Nobel Foundation (CC0).