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Design of a 120 mm Bore 15 T Quadrupole for the LHC Upgrade Phase II

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18 Author(s)
S. Caspi ; Lawrence Berkeley National Laboratory, Berkeley, CA, USA ; G. Ambrosio ; M. Anerella ; E. Barzi
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Future upgrades to machines like the Large Hadron Collider (LHC) at CERN will push accelerator magnets beyond 10 T forcing the replacement of NbTi superconductors with advanced superconductors such as Nb3Sn. In support of the LHC Phase-II upgrade, the US LHC Accelerator Research Program (LARP) is developing a large bore (120 mm) Nb3Sn Interaction Region (IR) quadrupole (HQ) capable of reaching 15 T at its conductor limit and gradients of 199 T/m at 4.4 K and 219 T/m at 1.9 K. The 1 m long, two-layer magnet, addresses coil alignment and accelerator quality features while exploring the magnet performance limits in terms of gradient, stress and structure. This paper summarizes and reports on the design, mechanical structure, coil windings, reaction and impregnation processes.

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IEEE Transactions on Applied Superconductivity  (Volume:20 ,  Issue: 3 )