Pulsed ferrite core tests for 50-ns linear induction accelerator

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The Lawrence Livermore Laboratory undertook an investigation of the properties of ferrite materials to be used in a 5-MeV, 50-ns linear induction accelerator. The investigation, on a part-time basis, lasted about one year and had the cooperation and helpful suggestions of several manufacturers: TDK of Japan, Phillips of Holland, and Stackpole of the U.S.A. Ferrites have been widely used as tuning cavities for proton synchrotron accelerators at radio frequencies. In such an application, the ..mu..Qf factor is used in describing the figure of merit for ferrites where a high duty factor requires low loss ferrites. In a linear induction accelerator ... continued below

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Pages: 4

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Reginato, L.; Cook, E.; Dexter, W. & Schmidt, J. February 28, 1978.

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  • Lawrence Livermore Laboratory
    Publisher Info: California Univ., Livermore (USA). Lawrence Livermore Lab.
    Place of Publication: Livermore, California

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Description

The Lawrence Livermore Laboratory undertook an investigation of the properties of ferrite materials to be used in a 5-MeV, 50-ns linear induction accelerator. The investigation, on a part-time basis, lasted about one year and had the cooperation and helpful suggestions of several manufacturers: TDK of Japan, Phillips of Holland, and Stackpole of the U.S.A. Ferrites have been widely used as tuning cavities for proton synchrotron accelerators at radio frequencies. In such an application, the ..mu..Qf factor is used in describing the figure of merit for ferrites where a high duty factor requires low loss ferrites. In a linear induction accelerator with an average reprate of 5-Hz, the ferrite losses are negligible and the concept of complex permeability in describing the losses will not be introduced, but a large signal ..delta..B/..delta..H will be used to describe their properties. The properties of interest in designing the accelerating cavity were (1) flux swing ..delta..B = B/sub r/ + B/sub m/ greater than 0.5T; (2) a residual flux density B/sub r/ greater than or = to 0.15T with a reset no greater than 2 Oer; (3) a relatively high incremental ..mu.. greater than 400 to keep the excitation current small in relation to the load current; and (4) a high resistivity for the 250-kV voltage hold-off.

Physical Description

Pages: 4

Notes

Dep. NTIS, PC A02/MF A01.

Source

  • International magnetics conference, Florence, Italy, 9 May 1978

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  • Report No.: UCRL-80811
  • Report No.: CONF-7805107-1
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 6644054
  • Archival Resource Key: ark:/67531/metadc1186766

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • February 28, 1978

Added to The UNT Digital Library

  • July 3, 2018, 8:14 a.m.

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  • Feb. 15, 2019, 2:47 p.m.

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Reginato, L.; Cook, E.; Dexter, W. & Schmidt, J. Pulsed ferrite core tests for 50-ns linear induction accelerator, article, February 28, 1978; Livermore, California. (https://digital.library.unt.edu/ark:/67531/metadc1186766/: accessed March 18, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.