Assembly and Test of HD2, a 36 mm bore high field Nb3Sn Dipole Magnet

Journal Article · Sun Aug 17 04:00:00 EDT 2008 · IEEE Transactions on Applied Superconductivity

OSTI ID:971556

Ferracin, P; Bingham, B; Caspi, S; Dietderich, D R; Felice, H; Godeke, A; Hafalia, A R; Hannaford, C R; Joseph, J; Lietzke, A F; Lizarazo, J; Sabbi, G; Trillaud, F; Wang, X

We report on the fabrication, assembly, and test of the Nb{sub 3}Sn dipole magnet HD2. The magnet, aimed at demonstrating the application of Nb{sub 3}Sn superconductor in high field accelerator-type dipoles, features a 36 mm clear bore surrounded by block-type coils with tilted ends. The coil design is optimized to minimize geometric harmonics in the aperture and the magnetic peak field on the conductor in the coil ends. The target bore field of 15 T at 4.3 K is consistent with critical current measurements of extracted strands. The coils are horizontally pre-stressed during assembly using an external aluminum shell pre-tensioned with water-pressurized bladders. Axial pre-loading of the coil ends is accomplished through two end plates and four aluminum tension rods. The strain in coil, shell, and rods is monitored with strain gauges during assembly, cool-down and magnet excitation, and compared with 3D finite element computations. Magnet's training performance, quench locations, and ramp-rate dependence are then analyzed 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: 971556
• Report Number(s): LBNL-2348E
• Journal Information: IEEE Transactions on Applied Superconductivity, Journal Name: IEEE Transactions on Applied Superconductivity Journal Issue: 3 Vol. 19
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
APERTURES
CRITICAL CURRENT
DESIGN
DIPOLES
EXCITATION
FABRICATION
HARMONICS
MAGNETS
PERFORMANCE
PLATES
STRAINS
SUPERCONDUCTORS
TARGETS
TRAINING