Mechanical Design Studies of the MQXF Long Model Quadrupole for the HiLumi LHC

Journal Article · Tue Dec 20 00:00:00 EST 2016 · IEEE Transactions on Applied Superconductivity

DOI:https://doi.org/10.1109/TASC.2016.2642169· OSTI ID:1339116

Pan, Heng ^[1]; Anderssen, Eric ^[1]; Ambrosio, Giorgio ^[2]; Cheng, Daniel ^[1]; Juchno, Mariusz ^[1]; Ferracin, Paolo ^[3]; Felice, Helene ^[4]; Perez, Juan ^[3]; Prestemon, Soren ^[1]; Vallone, Giorgio ^[3]

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1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
3. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
4. Alternative Energies and Atomic Energy Commission (CEA), Saclay (France)

The Large Hadron Collider Luminosity upgrade (HiLumi) program requires new low-β triplet quadrupole magnets, called MQXF, in the interaction region to increase the LHC peak and integrated luminosity. The MQXF magnets, designed and fabricated in collaboration between CERN and the U.S. LARP, will all have the same cross section. The MQXF long model, referred as MQXFA, is a quadrupole using the Nb3Sn superconducting technology with 150 mm aperture and a 4.2 m magnetic length and is the first long prototype of the final MQXF design. The MQXFA magnet is based on the previous LARP HQ and MQXFS designs. In this paper, we present the baseline design of the MQXFA structure with detailed three-dimensional (3-D) numerical analysis. A detailed tolerance analysis of the baseline case has been performed by using a 3-D finite element model, which allows fast computation of structures modeled with actual tolerances. Tolerance sensitivity of each component is discussed to verify the actual tolerances to be achieved by vendors. Tolerance stack-up analysis is presented in the end of this paper.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Grant/Contract Number: AC02-07CH11359; SC0000661; AC02-05CH11231
• OSTI ID: 1339116
• Alternate ID(s): OSTI ID: 1561873
• Report Number(s): FERMILAB-PUB-16-606-TD; 1508104; TRN: US1701113
• Journal Information: IEEE Transactions on Applied Superconductivity, Vol. PP, Issue 99; 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 (HL-LHC)
quadrupole
LARP
Nb3Sn magnet
shell-based support structure
long model
tolerance analysis