the 27-inch cyclotron at the Radiation Laboratory in 1934. During that year, Livingston applied to graduate schools for teaching fellowships, and was accepted by both
Harvard University and the
University of California. He accepted the latter and returned to California. a topic suggested by
Ernest Lawrence, who had noticed that ions of mass M and charge e moving in a uniform magnetic field B circulate at a constant frequency \omega independent of energy: : = { eB \over Mc } In theory, therefore, if a particle traversed an electrode with a voltage V N times, it would acquire energy of NeV. Stanley's task was to verify if this would work. In January 1931, Stanley managed to do just that, using a voltage of 1 kV to accelerate hydrogen ions to 80 keV. At Lawrence's prompting, Stanley quickly wrote up his thesis and submitted it in April 1931 so that he would be eligible for an instructorship the following year. In the cyclotron, they had a powerful scientific instrument, but this did not translate into scientific discovery. In April 1932,
John Cockcroft and
Ernest Walton at the
Cavendish laboratory in England announced that they had bombarded
lithium with
protons and succeeded in transmuting it into
helium. The energy required turned out to be quite low—well within the capability of the 11-inch cyclotron. On learning about it, Lawrence wired the Berkeley and asked for Cockcroft and Walton's results to be verified. It took the team until September to do so, mainly due to lack of adequate detection apparatus. Between 1932 and 1934, Livingston authored or co-authored over a dozen papers on nuclear physics and the cyclotron, but he felt overshadowed by Lawrence, and did not think that he had gotten sufficient credit for his part in designing the cyclotron, for which Lawrence would receive the
Nobel Prize in Physics in November 1939. Livingston therefore accepted an offer of an
assistant professorship from
Cornell University in 1934. He also teamed up with Bethe to demonstrate for the first time that the
neutron has a
magnetic moment. Livingston recalled that Bethe: Physicists at the
Massachusetts Institute of Technology (MIT) had decided that they too needed a cyclotron, and
Robley Evans hired Livingston to build a cyclotron there in 1938. Livingston became an instructor at MIT the following year, and an assistant professor the year after. The cyclotron was completed in 1940. During
World War II, he worked with the cyclotron for the Office of Medical Research of the
Office of Scientific Research and Development (OSRD), producing radioactive isotopes of phosphorus and iron that were used as tracers in medical experiments. The result of this research was new methods of stabilizing blood, so that it could be shipped to the troops in remote theaters of war. In 1944, Livingston joined
Philip Morse's
operations research group at the
Office of Naval Research, and he worked in Washington, D.C., and London on radar countermeasures to the
U-boats. == Later life ==