Test Results for RD3c, A Nb3Sn Common-Coil Racetrack Dipole Magnet

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The Superconducting Magnet Group at Lawrence Berkeley Laboratory has been developing racetrack technology for economical, high-field accelerator magnets from brittle superconductor. Recent tests have demonstrated (1) robust, reusable, double-layer, flat racetrack, wind and react Nb{sub 3}Sn coils, (2) a reusable, easily assembled, coil-support structure that can minimize conductor movement, and (3) 15T dipole fields, with no degradation. RD3c is our first attempt to compare measured and calculated field harmonics. A single-layer, Nb{sub 3}Sn, flat racetrack inner-coil was wound on both sides of a bore-plate, and then reacted and potted (as previously). Hard spacers were wound into the inner coils, to ... continued below

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Lietzke, A.F.; Caspi, S.; Coccoli, M.; Dietderich, D.R.; Ferracin, P.; Gourlay, S.A. et al. August 1, 2002.

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The Superconducting Magnet Group at Lawrence Berkeley Laboratory has been developing racetrack technology for economical, high-field accelerator magnets from brittle superconductor. Recent tests have demonstrated (1) robust, reusable, double-layer, flat racetrack, wind and react Nb{sub 3}Sn coils, (2) a reusable, easily assembled, coil-support structure that can minimize conductor movement, and (3) 15T dipole fields, with no degradation. RD3c is our first attempt to compare measured and calculated field harmonics. A single-layer, Nb{sub 3}Sn, flat racetrack inner-coil was wound on both sides of a bore-plate, and then reacted and potted (as previously). Hard spacers were wound into the inner coils, to adjust the geometric field harmonics, and identify any problems from hard-spacers. Harmonic measurements with a warm rotating coil also required a considerably thicker bore-plate (for the 35mm OD anti-cryostat). The inner coil-module was sandwiched between two existing outer-coil modules, and pre-stressed within the reusable yoke and shell loading structure. The magnet's performance is discussed, and compared with calculations.

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  • Report No.: LBNL-49916
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 1011742
  • Archival Resource Key: ark:/67531/metadc833794

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Office of Scientific & Technical Information Technical Reports

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  • August 1, 2002

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • June 15, 2016, 9:47 p.m.

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Lietzke, A.F.; Caspi, S.; Coccoli, M.; Dietderich, D.R.; Ferracin, P.; Gourlay, S.A. et al. Test Results for RD3c, A Nb3Sn Common-Coil Racetrack Dipole Magnet, article, August 1, 2002; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc833794/: accessed April 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.