Description: Papers of Donald W. Kerst (1911-93), professor of physics (1938-57), including correspondence and laboratory notebooks (1939-47) on betatron design and research, Physics Department matters, Office for Scientific Research and Development reports, and the Midwest Universities Research Association - MURA (1953-59). The papers include patents, correspondence (1940-45), blueprints, information on betatron construction, drafts of articles, research notes, memoranda to coworkers, and correspondence while Kerst was working at the University of Illinois (1938-39, 1941-42, 1945-56), at the General Electric laboratories in Schenectady (1940-41), at Los Alamos New Mexico (1943-45), and Madison, Wisconsin with the MURA (1956-57). The main correspondents are Gail D. Adams, Gerald M.Almy, P. Gerald Kruger, F. Wheeler Loomis, and Bob Serber. Correspondents also include Roger Adams, Clinton P. Anderson, Robert D. Carmichael, James B. Conant, William D. Coolidge, Robert J. Vande Graaff, Leslie R. Groves, Frank B. Jewett, Robert Oppenheimer, William Proxmire, Duane Roller, Emilio Segre, I. Melville Stein and Arthur C. Willard.