 After the war ended , Creutz accepted an offer to come to the Carnegie Institute of Technology , where he became the head of its Physics Department and its Nuclear Research Center in 1948 . In 1955 he returned to Los Alamos to evaluate its thermonuclear fusion program for the Atomic Energy Commission . While there he accepted an offer to become Vice President for Research and Development and the Director of its John Jay Hopkins Laboratory for Pure and Applied Science at General Atomics . Under his leadership , General Atomics developed TRIGA , a nuclear reactor for universities and laboratories . 
