Nu shifts in betatron oscillations from uniform perturbations in the presence of non-linear magnetic guide fields

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Uniform magnetic field perturbations cause a closed orbit distortion in a circular accelerator. If the magnetic guide field is non-linear these perturbations can also cause a Nu shift in the betatron oscillations. Such a shift in radial Nu values has been observed in the Bevalac while studying the low energy resonant extraction system. In the Bevalac, the radial perturbation comes from the quadrants being magnetically about 0.8% longer than 90/sup 0/. The normal effect of this type of perturbation is a radial closed orbit shift and orbit distortion. The Nu shift, associated with this type of perturbation in the presence ... continued below

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Pages: 6

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Crebbin, K.C. May 1, 1985.

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Uniform magnetic field perturbations cause a closed orbit distortion in a circular accelerator. If the magnetic guide field is non-linear these perturbations can also cause a Nu shift in the betatron oscillations. Such a shift in radial Nu values has been observed in the Bevalac while studying the low energy resonant extraction system. In the Bevalac, the radial perturbation comes from the quadrants being magnetically about 0.8% longer than 90/sup 0/. The normal effect of this type of perturbation is a radial closed orbit shift and orbit distortion. The Nu shift, associated with this type of perturbation in the presence of a non-linear guide field, is discussed in this paper. A method of handling the non-linear n values is discussed as well as the mechanism for the associated Nu shift. Computer calculations are compared to measurements. 2 refs., 4 figs.

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Pages: 6

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NTIS, PC A02/MF A01.

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  • Particle accelerator conference, Vancouver, Canada, 13 May 1985

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  • Other: DE85015248
  • Report No.: LBL-18938
  • Report No.: CONF-850504-233
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 5419384
  • Archival Resource Key: ark:/67531/metadc1068461

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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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  • May 1, 1985

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

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  • April 25, 2018, 4:48 p.m.

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Crebbin, K.C. Nu shifts in betatron oscillations from uniform perturbations in the presence of non-linear magnetic guide fields, article, May 1, 1985; [Berkeley,] California. (digital.library.unt.edu/ark:/67531/metadc1068461/: accessed September 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.