Magnetic Analysis of the MQXF Quadrupole for the High Luminosity LHC

Journal Article · Mon Feb 04 00:00:00 EST 2019 · TBD

OSTI ID:1498549

Izquierdo Bermudez, S. ^[1]; Fiscarelli, L. ^[2]; Ambrosio, G. ^[3]; Bajas, H. ^[2]; Chlachidze, G. ^[3]; Ferracin, P. ^[2]; Di Marco, J. ^[3]; Stoynev, S. ^[3]; Todesco, E. ^[2]; Sabbi, G. L. ^[4]; Vallone, G. ^[2]

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1. Madrid Politecnic U., ETSI Minas
2. CERN
3. Fermilab
4. LBL, Berkeley

The high-luminosity upgrade of the large hadron collider (HL-LHC) requires new high-field and large-aperture quadrupole magnets for the low-beta inner triplets (MQXF). The US Hilumi-LHC Accelerator Upgrade (HL-LHC AUP) and CERN are jointly developing a 150 mm aperture Nb3Sn magnet. Due to the large beam size and orbit displacement in the final focusing triplet, MQXF has challenging field quality targets at collision energy. Magnetic measurements have been performed both at ambient and cryogenic temperatures in the four short models built and tested. This paper presents the magnetic analysis, comparing field measurements with the expectations and the field quality requirements. The analysis is focused on the geometrical harmonics and iron saturation effect, including three dimensional effects and transfer function repeatability. Persistent currents and dynamic effects are also discussed.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: LARP
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1498549
• Report Number(s): FERMILAB-PUB-19-054; 1724039
• Journal Information: TBD, Journal Name: TBD
• Country of Publication: United States
• Language: English

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