The 11 T dipole for HL-LHC: Status and plan

Journal Article · Wed Jun 01 00:00:00 EDT 2016 · IEEE Transactions on Applied Superconductivity

DOI:https://doi.org/10.1109/TASC.2016.2547881· OSTI ID:1326595

Savary, F. ^[1]; Barzi, E. ^[2]; Bordini, B. ^[1]; Bottura, L. ^[1]; Chlachidze, G. ^[2]; Ramos, D. ^[1]; Bermudez, S. Izquierdo ^[1]; Karppinen, M. ^[1]; Lackner, F. ^[1]; Loffler, C. H. ^[1]; Moron-Ballester, R. ^[1]; Nobrega, A. ^[2]; Perez, J. C. ^[1]; Prin, H. ^[1]; Smekens, D. ^[1]; de Rijk, G. ^[1]; Redaelli, S. ^[1]; Rossi, L. ^[1]; Willering, G. ^[1]; Zlobin, A. V. ^[2] ; Giovannozzi, M. ^[1]

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1. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

The upgrade of the Large Hadron Collider (LHC) collimation system includes additional collimators in the LHC lattice. The longitudinal space for these collimators will be created by replacing some of the LHC main dipoles with shorter but stronger dipoles compatible with the LHC lattice and main systems. The project plan comprises the construction of two cryoassemblies containing each of the two 11-T dipoles of 5.5-m length for possible installation on either side of interaction point 2 of LHC in the years 2018-2019 for ion operation, and the installation of two cryoassemblies on either side of interaction point 7 of LHC in the years 2023-2024 for proton operation. The development program conducted in conjunction between the Fermilab and CERN magnet groups is progressing well. The development activities carried out on the side of Fermilab were concluded in the middle of 2015 with the fabrication and test of a 1-m-long two-in-one model and those on the CERN side are ramping up with the construction of 2-m-long models and the preparation of the tooling for the fabrication of the first full-length prototype. The engineering design of the cryomagnet is well advanced, including the definition of the various interfaces, e.g., with the collimator, powering, protection, and vacuum systems. Several practice coils of 5.5-m length have been already fabricated. This paper describes the overall progress of the project, the final design of the cryomagnet, and the performance of the most recent models. Furthermore, the overall plan toward the fabrication of the series magnets for the two phases of the upgrade of the LHC collimation system is also presented.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Grant/Contract Number: AC02-07CH11359
• OSTI ID: 1326595
• Report Number(s): FERMILAB-CONF-16-358-TD; 1477992
• 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
High Luminosity LHC Project
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collimators
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cable insulation