Robert Lee Walker was an American physicist.
Walker was born in 1919 in Saint Louis. He received a B.S. in physics from the University of Chicago.
During World War II, Walker was hired to work on the Manhattan Project at the Chicago Met Lab as a research assistant. He would also work at Los Alamos.
After the war, Walker went on to receive a Ph.D. from Cornell University, for which he built a miniature cyclotron. He then taught physics for many years at the California Institute of Technology, where he helped to build the Caltech Synchrotron.
Walker died on January 5, 2005, in Tesuque, New Mexico.