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

Journal Article · Thu Jun 01 04:00:00 EDT 2006 · IEEE Transactions on Applied Superconductivity

DOI:https://doi.org/10.1109/TASC.2006.871323· OSTI ID:943514

Ferracin, P; Bartlett, S E; Caspi, S; Dietderich, D R; Gourlay, S A; Hafalia, A R; Hannaford, C R; Lietzke, A F; Mattafirri, S; McInturff, A D; Sabbi, G L

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.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: Accelerator& Fusion Research Division
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 943514
• Report Number(s): LBNL-1215E
• Journal Information: IEEE Transactions on Applied Superconductivity, Journal Name: IEEE Transactions on Applied Superconductivity Journal Issue: 2 Vol. 16
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACCELERATORS
ALUMINIUM
CONFIGURATION
DESIGN
DIPOLES
EXCITATION
FABRICATION
HARMONICS
LORENTZ FORCE
MAGNETS
MECHANICAL STRUCTURES
PLATES
STAINLESS STEELS
STRESSES
SUPERCONDUCTING MAGNETS