Mechanical Performance of the First Two Prototype 4.5 m Long Nb3 Sn Low-β Quadrupole Magnets for the Hi-Lumi LHC Upgrade

Cheng, Daniel W.; Ambrosio, Giorgio; Anderssen, Eric C.; Ferracin, Paolo; Grosclaude, Philippe; Guinchard, Michael; Muratore, Joseph; Pan, Heng; Prestemon, Soren O.; Vallone, Giorgio

doi:10.1109/TASC.2020.2972210

Title: Mechanical Performance of the First Two Prototype 4.5 m Long Nb₃ Sn Low-β Quadrupole Magnets for the Hi-Lumi LHC Upgrade

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Abstract

The U.S. High-Luminosity LHC Accelerator Upgrade Project (HL-LHC AUP) team is collaborating with CERN in the design and fabrication of the first 4.5 m long MQXFA magnets, a 150 mm aperture high-field Nb3Sn quadrupole magnet that uses the aluminum shell-based bladder-and-key technology. The first two prototype magnets, MQXFAP1 and MQXFAP2, were assem-bled and tested while the first pre-series structure (MQXFA03) was in fabrication. This paper summarizes the mechanical perfor-mance of these prototype structures based on the comparison of measured strain gauge data with finite element model analyses from all load steps to powering. The MQXFAP1 magnet almost reached ultimate current before a short to ground was detected and the test was stopped. The MQXFAP2 magnet experienced a low training performance due to a fractured aluminum shell. MQXFAP1b was rebuilt with a new replacement coil, but an old coil limited the magnet from achieving the ultimate current. The mitigations and analyses of these prototype magnets are discussed in the context of the transition to pre-series production.

Authors:

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^[3];

^[3]; Guinchard, Michael ^[3];

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^[1]; Vallone, Giorgio ^[1]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
European Organization for Nuclear Research (CERN), Geneva (Switzerland)
Brookhaven National Lab. (BNL), Upton, NY (United States)

Publication Date:: Mon Jun 01 00:00:00 EDT 2020

Research Org.:: Brookhaven National Lab. (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)

OSTI Identifier:: 1606211

Report Number(s):: FERMILAB-PUB-20-117-TD
Journal ID: ISSN 1051-8223; oai:inspirehep.net:1787685; TRN: US2104484

Grant/Contract Number:: AC02-07CH11359

Resource Type:: Accepted Manuscript

Journal Name:: IEEE Transactions on Applied Superconductivity

Additional Journal Information:: Journal Volume: 30; Journal Issue: 4; Journal ID: ISSN 1051-8223

Publisher:: Institute of Electrical and Electronics Engineers (IEEE)

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; accelerator cavities; accelerator magnets; accelerator RF systems; colliding beam accelerators; finite element analysis; proton accelerators; strain gauges; superconducting coils; superconducting magnets

Citation Formats


                    Cheng, Daniel W., Ambrosio, Giorgio, Anderssen, Eric C., Ferracin, Paolo, Grosclaude, Philippe, Guinchard, Michael, Muratore, Joseph, Pan, Heng, Prestemon, Soren O., and Vallone, Giorgio. Mechanical Performance of the First Two Prototype 4.5 m Long Nb3 Sn Low-β Quadrupole Magnets for the Hi-Lumi LHC Upgrade.  United States: N. p., 2020. 
Web.  doi:10.1109/TASC.2020.2972210.

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                    Cheng, Daniel W., Ambrosio, Giorgio, Anderssen, Eric C., Ferracin, Paolo, Grosclaude, Philippe, Guinchard, Michael, Muratore, Joseph, Pan, Heng, Prestemon, Soren O., & Vallone, Giorgio. Mechanical Performance of the First Two Prototype 4.5 m Long Nb3 Sn Low-β Quadrupole Magnets for the Hi-Lumi LHC Upgrade.  United States.  https://doi.org/10.1109/TASC.2020.2972210

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                    Cheng, Daniel W., Ambrosio, Giorgio, Anderssen, Eric C., Ferracin, Paolo, Grosclaude, Philippe, Guinchard, Michael, Muratore, Joseph, Pan, Heng, Prestemon, Soren O., and Vallone, Giorgio. Mon .  
"Mechanical Performance of the First Two Prototype 4.5 m Long Nb3 Sn Low-β Quadrupole Magnets for the Hi-Lumi LHC Upgrade".  United States.  https://doi.org/10.1109/TASC.2020.2972210.  https://www.osti.gov/servlets/purl/1606211.

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@article{osti_1606211,

  title        = {Mechanical Performance of the First Two Prototype 4.5 m Long Nb3 Sn Low-β Quadrupole Magnets for the Hi-Lumi LHC Upgrade},

  author       = {Cheng, Daniel W. and Ambrosio, Giorgio and Anderssen, Eric C. and Ferracin, Paolo and Grosclaude, Philippe and Guinchard, Michael and Muratore, Joseph and Pan, Heng and Prestemon, Soren O. and Vallone, Giorgio},

  abstractNote = {The U.S. High-Luminosity LHC Accelerator Upgrade Project (HL-LHC AUP) team is collaborating with CERN in the design and fabrication of the first 4.5 m long MQXFA magnets, a 150 mm aperture high-field Nb3Sn quadrupole magnet that uses the aluminum shell-based bladder-and-key technology. The first two prototype magnets, MQXFAP1 and MQXFAP2, were assem-bled and tested while the first pre-series structure (MQXFA03) was in fabrication. This paper summarizes the mechanical perfor-mance of these prototype structures based on the comparison of measured strain gauge data with finite element model analyses from all load steps to powering. The MQXFAP1 magnet almost reached ultimate current before a short to ground was detected and the test was stopped. The MQXFAP2 magnet experienced a low training performance due to a fractured aluminum shell. MQXFAP1b was rebuilt with a new replacement coil, but an old coil limited the magnet from achieving the ultimate current. The mitigations and analyses of these prototype magnets are discussed in the context of the transition to pre-series production.},

  doi          = {10.1109/TASC.2020.2972210},

  journal      = {IEEE Transactions on Applied Superconductivity},

  number       = 4,

  volume       = 30,

  place        = {United States},

  year         = {Mon Jun 01 00:00:00 EDT 2020},

  month        = {Mon Jun 01 00:00:00 EDT 2020}

}

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Title: Mechanical Performance of the First Two Prototype 4.5 m Long Nb3 Sn Low-β Quadrupole Magnets for the Hi-Lumi LHC Upgrade

Abstract

Citation Formats

Title: Mechanical Performance of the First Two Prototype 4.5 m Long Nb₃ Sn Low-β Quadrupole Magnets for the Hi-Lumi LHC Upgrade