Hybrid permanent magnet quadrupoles for the Recycler Ring at Fermilab

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Hybrid Permanent Magnet Quadrupoles are used in several applications for the Fermilab Recycler Ring and associated beam transfer lines. Most of these magnets use a 0.6096 m long iron shell and provide integrated gradients up to 1.4 T-m/m with an iron pole tip radius of 41.6 mm. A 58.4 mm pole radius design is also required. Bricks of 25. 4 mm thick strontium ferrite supply the flux to the back of the pole to produce the desired gradients (0.6 to 2.75 T/m). For temperature compensation, Ni-Fe alloy strips are interspersed between ferrite bricks to subtract flux in a temperature dependent ... continued below

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6 p.; Other: FDE: POSTSCRIPT; PL:

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Brown, B.C.; Pruss, S.M.; Foster, G.W.; Glass, H.D.; Harding, D.J.; Jackson, G.R. et al. October 1, 1997.

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Hybrid Permanent Magnet Quadrupoles are used in several applications for the Fermilab Recycler Ring and associated beam transfer lines. Most of these magnets use a 0.6096 m long iron shell and provide integrated gradients up to 1.4 T-m/m with an iron pole tip radius of 41.6 mm. A 58.4 mm pole radius design is also required. Bricks of 25. 4 mm thick strontium ferrite supply the flux to the back of the pole to produce the desired gradients (0.6 to 2.75 T/m). For temperature compensation, Ni-Fe alloy strips are interspersed between ferrite bricks to subtract flux in a temperature dependent fashion. Adjustments of the permeance of each pole using iron between the pole and the flux return shell permits the matching of pole potentials. Magnetic potentials of the poles are adjusted to the desired value to achieve the prescribed strength and field uniformity based on rotating coil harmonic measurements. Procurement, fabrication, pole potential adjustment, and measured fields will be reported.

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6 p.; Other: FDE: POSTSCRIPT; PL:

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INIS; OSTI as DE98051406

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  • 15. international conference on magnet technology, Beijing (China), 20-24 Oct 1997

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  • Other: DE98051406
  • Report No.: FNAL/C--97/337
  • Report No.: CONF-9710127--
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 577216
  • Archival Resource Key: ark:/67531/metadc695090

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  • October 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 1, 2016, 5:29 p.m.

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Brown, B.C.; Pruss, S.M.; Foster, G.W.; Glass, H.D.; Harding, D.J.; Jackson, G.R. et al. Hybrid permanent magnet quadrupoles for the Recycler Ring at Fermilab, article, October 1, 1997; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc695090/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.