Modification of the horizontal dispersion in the Fermilab Main Ring with additional quadrupoles

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In the normal Main Ring lattice, the horizontal dispersion includes a dispersion wave'' which peaks at 6.2 meters because the horizontal dispersion of the arcs is not matched into the straight sections. Six additional small quadrupoles have been installed, one in each sector, and powered at low energies (up to 30 GeV) in order to reduce the amplitude of the dispersion wave. The maxima of the dispersion function were thereby reduced to less than 4.7 meters, thus improving the momentum acceptance of the Main Ring. Measurements of the modified dispersion function agree well with the expected values. 3 refs., 5 ... continued below

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Trbojevic, D.; Kourbanis, I. & Ankenbrandt, C. May 1, 1991.

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In the normal Main Ring lattice, the horizontal dispersion includes a dispersion wave'' which peaks at 6.2 meters because the horizontal dispersion of the arcs is not matched into the straight sections. Six additional small quadrupoles have been installed, one in each sector, and powered at low energies (up to 30 GeV) in order to reduce the amplitude of the dispersion wave. The maxima of the dispersion function were thereby reduced to less than 4.7 meters, thus improving the momentum acceptance of the Main Ring. Measurements of the modified dispersion function agree well with the expected values. 3 refs., 5 figs.

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Pages: (4 p)

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OSTI; NTIS; INIS; GPO Dep.

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  • 1991 Institute of Electrical and Electronics Engineers (IEEE) particle accelerator conference (PAC), San Francisco, CA (USA), 6-9 May 1991

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  • Other: DE91014837
  • Report No.: FNAL/C-91/156
  • Report No.: CONF-910505--331
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 5660495
  • Archival Resource Key: ark:/67531/metadc1094131

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Office of Scientific & Technical Information Technical Reports

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  • May 1, 1991

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  • Feb. 10, 2018, 10:06 p.m.

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  • May 9, 2018, 4:24 p.m.

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Trbojevic, D.; Kourbanis, I. & Ankenbrandt, C. Modification of the horizontal dispersion in the Fermilab Main Ring with additional quadrupoles, article, May 1, 1991; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc1094131/: accessed May 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.