Mechanical performance of short models for MQXF, the Nb3Sn low-β quadrupole for the Hi-Lumi LHC

Journal Article · Fri Dec 23 00:00:00 EST 2016 · IEEE Transactions on Applied Superconductivity

DOI:https://doi.org/10.1109/TASC.2016.2645133· OSTI ID:1365577

Vallone, Giorgio  ^[1]; Ambrosio, Giorgio  ^[2]; Anderssen, Eric ^[3]; Bourcey, Nicolas ^[1]; Cheng, Daniel W. ^[3]; Felice, Helene ^[4]; Ferracin, Paolo ^[1]; Fichera, Claudio ^[1]; Grosclaude, Philippe ^[1]; Guinchard, Michael ^[1]; Juchno, Mariusz ^[3]; Pan, Heng ^[3]; Perez, Juan Carlos ^[1]; Prestemon, Soren ^[3]

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

In the framework of the Hi-Lumi LHC Project, CERN and U.S. LARP are jointly developing MQXF, a 150-mm aperture high-field Nb3Sn quadrupole for the upgrade of the inner triplet of the low-beta interaction regions. The magnet is supported by a shell-based structure, providing the preload by means of bladder-key technology and differential thermal contraction of the various components. Two short models have been produced using the same cross section currently considered for the final magnet. The structures were preliminarily tested replacing the superconducting coils with blocks of aluminum. This procedure allows for model validation and calibration, and also to set performance goals for the real magnet. Strain gauges were used to monitor the behavior of the structure during assembly, cool down and also excitation in the case of the magnets. The various structures differ for the shell partitioning strategies adopted and for the presence of thick or thin laminations. This paper presents the results obtained and discusses the mechanical performance of all the short models produced up to now.

• 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)
• Grant/Contract Number: AC02-07CH11359; AC02-05CH11231
• OSTI ID: 1365577
• Alternate ID(s): OSTI ID: 1561876
• Report Number(s): FERMILAB-PUB-17-200-TD; 1594854; TRN: US1702189
• 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
Hi-Lumi LHC
LARP
Nb3Sn magnet
quadrupole
short model