Mechanical Design of HD2, a 15 T Nb3Sn Dipole Magnet with a 35 mm Bore

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After the fabrication and test of HD1, a 16 T Nb{sub 3}Sn dipole magnet based on flat racetrack coil configuration, the Superconducting Magnet Program at Lawrence Berkeley National Laboratory (LBNL) is developing the Nb{sub 3}Sn dipole HD2. With a dipole field above 15 T, a 35 mm clear bore, and nominal field harmonics within a fraction of one unit, HD2 represents a further step towards the application of block-type coils to high-field accelerator magnets. The design features tilted racetrack-type ends, to avoid obstructing the beam path, and a 4 mm thick stainless steel tube, to support the coil during the ... continued below

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Ferracin, P.; Bartlett, S.E.; Caspi, S.; Dietderich, D.R.; Gourlay, S.A.; Hafalia, A.R. et al. June 1, 2006.

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After the fabrication and test of HD1, a 16 T Nb{sub 3}Sn dipole magnet based on flat racetrack coil configuration, the Superconducting Magnet Program at Lawrence Berkeley National Laboratory (LBNL) is developing the Nb{sub 3}Sn dipole HD2. With a dipole field above 15 T, a 35 mm clear bore, and nominal field harmonics within a fraction of one unit, HD2 represents a further step towards the application of block-type coils to high-field accelerator magnets. The design features tilted racetrack-type ends, to avoid obstructing the beam path, and a 4 mm thick stainless steel tube, to support the coil during the preloading operation. The mechanical structure, similar to the one used for HD1, is based on an external aluminum shell pretensioned with pressurized bladders. Axial rods and stainless steel plates provide longitudinal support to the coil ends during magnet excitation. A 3D finite element analysis has been performed to evaluate stresses and deformations from assembly to excitation, with particular emphasis on conductor displacements due to Lorentz forces. Numerical results are presented and discussed.

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  • Journal Name: IEEE Transactions on Applied Superconductivity; Journal Volume: 16; Journal Issue: 2

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  • Report No.: LBNL-1215E
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1109/TASC.2006.871323 | External Link
  • Office of Scientific & Technical Information Report Number: 943514
  • Archival Resource Key: ark:/67531/metadc893860

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  • June 1, 2006

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  • Sept. 27, 2016, 1:39 a.m.

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  • Oct. 31, 2016, 11:57 a.m.

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Ferracin, P.; Bartlett, S.E.; Caspi, S.; Dietderich, D.R.; Gourlay, S.A.; Hafalia, A.R. et al. Mechanical Design of HD2, a 15 T Nb3Sn Dipole Magnet with a 35 mm Bore, article, June 1, 2006; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc893860/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.