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Title: Development of MQXF: The Nb 3Sn low-β quadrupole for the HiLumi LHC

The High Luminosity (HiLumi) Large Hadron Collider (LHC) project has, as the main objective, to increase the LHC peak luminosity by a factor five and the integrated luminosity by a factor ten. This goal will be achieved mainly with a new interaction region layout, which will allow a stronger focusing of the colliding beams. The target will be to reduce the beam size in the interaction points by a factor of two, which requires doubling the aperture of the low-β (or inner triplet) quadrupole magnets. The use of Nb3Sn superconducting material and, as a result, the possibility of operating at magnetic field levels in the windings higher than 11 T will limit the increase in length of these quadrupoles, called MQXF, to acceptable levels. After the initial design phase, where the key parameters were chosen and the magnet's conceptual design finalized, the MQXF project, a joint effort between the U.S. LHC Accelerator Research Program and the Conseil Europeen pour la Recherche Nucleaire (CERN), has now entered the construction and test phase of the short models. Concurrently, the preparation for the development of the full-length prototypes has been initiated. Lastly, this paper will provide an overview of the project status, describingmore » and reporting on the performance of the superconducting material, the lessons learnt during the fabrication of superconducting coils and support structure, and the fine tuning of the magnet design in view of the start of the prototyping phase.« less
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  1. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. INFN-LASA, Segrate (Italy)
  6. Tampere Univ. of Technology, Tampere (Finland)
Publication Date:
Report Number(s):
Journal ID: ISSN 1051-8223; 1423497
Grant/Contract Number:
AC02-07CH11359; AC02-05CH11231
Accepted Manuscript
Journal Name:
IEEE Transactions on Applied Superconductivity
Additional Journal Information:
Journal Volume: 26; Journal Issue: 4; Journal ID: ISSN 1051-8223
Institute of Electrical and Electronics Engineers (IEEE)
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
43 PARTICLE ACCELERATORS; high luminosity; LHC; interaction regions; low-β quadrupoles; Nb3Sn magnets
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1454468