Donald William Kerst

Donald William Kerst (November 1, 1911 – August 19, 1993) was an American <a href="/facts/Physicist/cQcgvSIm">physicist</a> who worked on advanced <a href="/facts/Particle_accelerator/Pkuc08xC">particle accelerator</a> concepts (<a href="/facts/Accelerator_physics/2cgsbvQ6">accelerator physics</a>) and <a href="/facts/Plasma_physics/1d3btMVU">plasma physics</a>. He is most notable for his development of the <a href="/facts/Betatron/dguFUEYW">betatron</a>, a novel type of particle accelerator used to accelerate <a href="/facts/Electrons/L0KBo5cW">electrons</a>.
A graduate of the <a href="/facts/University_of_Wisconsin%E2%80%93Madison/Rfj54YvS">University of Wisconsin–Madison</a>, Kerst developed the first betatron at the <a href="/facts/University_of_Illinois_at_Urbana_Champaign/gusw7HoS">University of Illinois at Urbana Champaign</a>, where it became operational on July 15, 1940. During <a href="/facts/World_War_II/2efV5L1U">World War II</a>, Kerst took a leave of absence in 1940 and 1941 to work on it with the engineering staff at <a href="/facts/General_Electric/bBm5CzVY">General Electric</a>, and he designed a portable betatron for inspecting <a href="/facts/Dud/DcG4L4nI">dud</a> bombs. In 1943 he joined the <a href="/facts/Manhattan_Project/gtg8yRK2">Manhattan Project</a>'s <a href="/facts/Los_Alamos_Laboratory/8eL6rj8N">Los Alamos Laboratory</a>, where he was responsible for designing and building the Water Boiler, a <a href="/facts/Nuclear_reactor/8xqjIbge">nuclear reactor</a> intended to serve as a laboratory instrument.
From 1953 to 1957 Kerst was technical director of the <a href="/facts/Midwestern_Universities_Research_Association/Y9eXcePc">Midwestern Universities Research Association</a>, where he worked on advanced particle accelerator concepts, most notably the <a href="/facts/FFAG_accelerator/LCwlCws5">FFAG accelerator</a>. He was then employed at <a href="/facts/General_Atomics/u8jAsX9y">General Atomics</a>'s John Jay Hopkins Laboratory from 1957 to 1962, where he worked on the problem of plasma physics. With <a href="/facts/Tihiro_Ohkawa/5wc8eXI0">Tihiro Ohkawa</a> he invented <a href="/facts/Toroid/EzsnyLtR">toroidal</a> devices for containing the plasma with magnetic fields. Their devices were the first to contain plasma without the instabilities that had plagued previous designs, and the first to contain plasma for lifetimes exceeding the <a href="/facts/Bohm_diffusion/L4Ap5It4">Bohm diffusion</a> limit.

Donald William Kerst open-in-new

Donald William Kerst