sentences:  After World War II, he emigrated to the United States to work at Wright-Patterson Air Force Base, in Ohio, for the Air Force Materiel Command.In 1950, he became a professor at the University of Illinois at Urbana–Champaign, where he became director of the Cyclotron Laboratory there in 1951.In 1956, he became a professor of physics at the University of Hamburg and spearheaded the effort to build the 7.5 GeV electron synchrotron DESY, the foundation of which was in December 1959.