File:Berkeley 60-inch cyclotron.jpg

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Description
English: Photograph shows the 60-inch cyclotron at the University of California Lawrence Radiation Laboratory, Berkeley, in August, 1939. The metal frame at left is the machine's huge electromagnet. The flat vacuum chamber in which the particles are accelerated is located in the narrow space between the magnet's 60 inch (152 centimeter, 5 foot) pole pieces. The beamline which analyses the particles resulting from the collisions is at right.

The machine was the most powerful particle accelerator in the world at the time. It had started operating early in the year. During the period of the photograph Dr. Edwin M. McMillan was doing the work which led to the discovery of neptunium (element 93) a year later. The instrument was used later by Dr. Glenn T. Seaborg and his colleagues for the discovery of element 94 (plutonium) early in 1941. Subsequently, other transuranium elements were discovered with the machine, as well as many radioisotopes, including carbon-14. For their work, Drs. Seaborg and McMillan shared the Nobel Prize in 1951. The machine was used for the "long bombardments" which produced the first weighable and visible quantities of plutonium, which was used at Chicago by Seaborg and his colleagues to work out the method for separating plutonium on an industrial scale at the Hanford, Washington, plutonium pro...
Русский: Фотография показывает 60-дюймовый циклотрон в университете Лаборатории California Lawrence Radiation, Беркли, в августе 1939. Машина была самым сильным ускорителем частиц в мире в то время.
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This media is available in the holdings of the National Archives and Records Administration, cataloged under the National Archives Identifier (NAID) 558594.

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Author Department of Energy. Office of Public Affairs
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Public domain This image is a work of a United States Department of Energy (or predecessor organization) employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.

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Photo of the 60 inch cyclotron particle accelerator at the University of California Lawrence Radiation Laboratory in 1939

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Date/TimeThumbnailDimensionsUserComment
current18:27, 20 October 2009Thumbnail for version as of 18:27, 20 October 20093,000 × 2,409 (2.3 MB)Pieter Kuiperhigher resolution from http://narademo.umiacs.umd.edu/cgi-bin/isadg/viewobject.pl?object=95114
19:12, 17 August 2008Thumbnail for version as of 19:12, 17 August 2008600 × 482 (104 KB)Pieter Kuiper{{Information |Description={{en|1=60-inch cyclotron at the University of California Lawrence Radiation Laboratory, Berkeley.}} |Source={{NARA-image|id=558594}} |Author=Department of Energy (?) |Date=1939 |Permission={{PD-USGov-DOE}} |other_versions= }} <

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