Hughes, Arthur Llewelyn, 1883-1978

Arthur Llewelyn Hughes (born 1883-died 1978), British/Welsh physicist. He worked on the Manhattan Project in St. Louis on the cyclotron and plutonium production and at Los Alamos, NM. He served as an assistant director at Los Alamos.

He studied physics at Liverpool University under Charles Barkla, and later worked at Cavendish Laboratory under J. J. Thomson. He researched cloud chambers, as well as the photoeletric effect. In 1923 he became a professor and chair of the physics department at Washington University in St. Louis, Missouri.