Second-generation coil design of the Nb₃Sn low-β quadrupole for the high luminosity LHC

Journal Article · Mon Jan 18 00:00:00 EST 2016 · IEEE Transactions on Applied Superconductivity

DOI:https://doi.org/10.1109/TASC.2016.2519002· OSTI ID:1244509

Bermudez, S. Izquierdo ^[1]; Ambrosio, G. ^[2]; Ballarino, A. ^[1]; Cavanna, E. ^[3]; Bossert, R. ^[2]; Cheng, D. ^[4]; Dietderich, D. ^[4]; Ferracin, P. ^[1]; Ghosh, A. ^[5]; Hagen, P. ^[1]; Holik, E. ^[2]; Perez, J. C. ^[1]; Rochepault, E. ^[1]; Schmalzle, J. ^[5]; Todesco, E. ^[1]; Yu, M. ^[2]

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1. CERN, Geneva (Switzerland)
2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
3. ASG Superconductors S.p.A., Genoa (Italy)
4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
5. Brookhaven National Lab. (BNL), Upton, NY (United States)

As part of the Large Hadron Collider Luminosity upgrade (HiLumi-LHC) program, the US LARP collaboration and CERN are working together to design and build a 150 mm aperture Nb₃Sn quadrupole for the LHC interaction regions. A first series of 1.5 m long coils were fabricated and assembled in a first short model. A detailed visual inspection of the coils was carried out to investigate cable dimensional changes during heat treatment and the position of the windings in the coil straight section and in the end region. The analyses allow identifying a set of design changes which, combined with a fine tune of the cable geometry and a field quality optimization, were implemented in a new, second-generation, coil design. In this study, we review the main characteristics of the first generation coils, describe the modification in coil lay-out, and discuss their impact on parts design and magnet analysis.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: LARP
• Grant/Contract Number: AC02-07CH11359
• OSTI ID: 1244509
• Report Number(s): FERMILAB-PUB-16-057-TD; 1427679
• Journal Information: IEEE Transactions on Applied Superconductivity, Vol. 26, Issue 4; ISSN 1051-8223
• Publisher: Institute of Electrical and Electronics Engineers (IEEE)
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
coil end design
LHC upgrade
Nb3Sn magnet
superconducting accelerator magnets