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    LRL Accelerators, The 184-Inch Synchrocyclotron
    LRL Accelerators, The 184-Inch Synchrocyclotron
    LRL Accelerators, The 184-Inch Synchrocyclotron
    Ebook67 pages27 minutes

    LRL Accelerators, The 184-Inch Synchrocyclotron

    By Lawrence Radiation Laboratory

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    LanguageEnglish
    PublisherArchive Classics
    Release dateNov 25, 2013
    LRL Accelerators, The 184-Inch Synchrocyclotron

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      Book preview

      LRL Accelerators, The 184-Inch Synchrocyclotron - Lawrence Radiation Laboratory

      Project Gutenberg's LRL Accelerators, by Lawrence Radiation Laboratory

      This eBook is for the use of anyone anywhere at no cost and with

      almost no restrictions whatsoever. You may copy it, give it away or

      re-use it under the terms of the Project Gutenberg License included

      with this eBook or online at www.gutenberg.org

      Title: LRL Accelerators

      The 184-Inch Synchrocyclotron

      Author: Lawrence Radiation Laboratory

      Release Date: August 10, 2010 [EBook #33397]

      Language: English

      *** START OF THIS PROJECT GUTENBERG EBOOK LRL ACCELERATORS ***

      Produced by Erica Pfister-Altschul, Mark C. Orton, and the

      Online Distributed Proofreading Team at http://www.pgdp.net

      LRL Accelerators

      THE 184-INCH SYNCHROCYCLOTRON

      LAWRENCE RADIATION LABORATORY

      UNIVERSITY OF CALIFORNIA, BERKELEY, CALIFORNIA

      Synchrocyclotron Building

      Contents

      Page

      THE 184-INCH SYNCHROCYCLOTRON2

      PRINCIPLE OF OPERATION OF A CONVENTIONAL CYCLOTRON3

      THE PRINCIPLE OF PHASE STABILITY6

      DESIGN AND CONSTRUCTION OF THE 184-INCH SYNCHROCYCLOTRON8

      Magnet8

      Vacuum System9

      Ion Source10

      Radiofrequency System10

      Internal Targets and Beam Extractor12

      CYCLOTRON EXPERIMENTS15

      Nuclear Physics15

      Biophysics18

      Nuclear Chemistry19

      BIBLIOGRAPHY20

      APPENDIX21

      THE 184-INCH SYNCHROCYCLOTRON

      His success with the 60-inch cyclotron in 1939 led Dr. E. O. Lawrence to propose a much more powerful accelerator, one which could produce new types of nuclear rearrangements and even create particles. Grants totaling $1,225,000 permitted work to start on the 184-inch cyclotron in August 1940.[1] It was designed to accelerate atomic particles to an energy of 100 million electron volts (Mev), five times that possible with the 60-inch machine.

      Fig. 1. The electromagnet under construction during the period 1940 to 1942.

      Before the new cyclotron could be finished World War II began. Construction on the cyclotron was therefore halted. However, because of interest in separating the isotopes of uranium by the electromagnetic method, work on the giant magnet continued at an even faster pace. This magnet would contain 3700 tons of steel in its yoke and pole pieces, and 300 tons of copper in its exciting coils (Fig. 1). By May 1942 the magnet was completed. During that summer it was used in a pilot plant to separate the first significant amounts of U²³⁵ ever obtained. The 184-inch magnet remained in use in

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