Progress on the Development of the Nb₃Sn 11T Dipole for the High Luminosity Upgrade of LHC

Journal Article · Wed Feb 08 00:00:00 EST 2017 · IEEE Transactions on Applied Superconductivity

DOI:https://doi.org/10.1109/TASC.2017.2666142· OSTI ID:1358107

Savary, Frederic  ^[1]; Bajko, Marta ^[1]; Bordini, Bernardo ^[1]; Bottura, Luca ^[1]; Fiscarelli, Lucio ^[1]; Fleiter, Jerome ^[1]; Foussat, Arnaud ^[1]; Bermudez, Susana Izquierdo ^[1]; Karppinen, Mikko ^[1]; Lackner, Friedrich ^[1]; Loffler, Christian H. ^[1]; Nilsson, Emelie ^[1]; Perez, Juan Carlos ^[1]; Prin, Herve ^[1]; Principe, Rosario ^[1]; Ramos, Delio ^[1]; de Rijk, Gijs ^[1]; Rossi, Lucio ^[1]; Smekens, David ^[1]; Sequeira Tavares, Sandra ^[1] ; Willering, Gerard ^[1]; Zlobin, Alexander V. ^[2]

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

The high-luminosity large hadron collider (LHC) project at CERN entered into the production phase in October 2015 after the completion of the design study phase. In the meantime, the development of the 11 T dipole needed for the upgrade of the collimation system of the machine made significant progress with very good performance of the first two-in-one magnet model of 2-m length made at CERN. The 11 T dipole, which is more powerful than the current main dipoles of LHC, can be made shorter with an equivalent integrated field. This will allow creating space for the installation of additional collimators in specific locations of the dispersion suppressor regions. Following tests carried out during heavy ions runs of LHC in the end of 2015, and a more recent review of the project budget, the installation plan for the 11 T dipole was revised. Consequently, one 11 T dipole full assembly containing two 11 T dipoles of 5.5-m length will be installed on either side of interaction point 7. These two units shall be installed during the long shutdown 2 in years 2019-2020. After a brief reminder on the design features of the magnet, this paper describes the current status of the development activities, in particular the short model programme and the construction of the first full scale prototype at CERN. Finally, critical operations such as the reaction treatment and the coil impregnation are discussed, the quench performance tests results of the two-in-one model are reviewed and finally, the plan toward the production for the long shut down 2 is described.

• Research Organization: European Organization for Nuclear Research (CERN), Geneva (Switzerland); 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: 1358107
• Report Number(s): FERMILAB-CONF-16-676; 1594855; TRN: US1702166
• Journal Information: IEEE Transactions on Applied Superconductivity, Vol. 27, 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
Large Hadron Collider
Apertures
Superconducting magnets
Collimators
Conductors
Electron tubes
Magnetic separation
accelerator magnets