Donald William Kerst
Donald William Kerst was an American physicist who worked on advanced particle accelerator concepts and plasma physics. He is most notable for his development of the betatron, a novel type of particle accelerator used to accelerate electrons.
Donald William Kerst was born in Galena, Illinois November 1, 1911, the son of Herman Samuel Kerst and Lillian E Wetz. He entered the University of Wisconsin, where he earned a Bachelor of Arts degree in 1934, and then his Doctor of Philosophy in 1937, writing his thesis on The Development of Electrostatic Generators in Air Pressure and Applications to Excitation Functions of Nuclear Reactions. This involved building and testing a 2.3 MeV generator for experiments with the scattering of protons.
Source: Wikipedia