Assembly of a Mechanical Model of MQXFB, the 7.2-m-Long Low-$\beta$ Quadrupole for the High-Luminosity LHC Upgrade

Vallone, Giorgio; Ambrosio, Giorgio; Anderssen, Eric; Bourcey, Nicolas; Cheng, Daniel W.; Ferracin, Paolo; Grosclaude, Philippe; Guinchard, Michael; Bermudez, Susana Izquierdo; Juchno, Mariusz; Lackner, Friedrich; Pan, Heng; Perez, Juan Carlos; Prestemon, Soren; Semeraro, Michela; Triquet, Stephane

doi:10.1109/tasc.2019.2892126

Title: Assembly of a Mechanical Model of MQXFB, the 7.2-m-Long Low-$$\beta$$ Quadrupole for the High-Luminosity LHC Upgrade

Abstract

The Nb₃Sn low-$$β$$ quadrupole MQXF is being developed as a part of the High-Luminosity large hadron collider (LHC) upgrade project. The magnet will be produced in two different configurations, sharing the same cross section but with different lengths. A 7.2-m mechanical model of MQXFB was recently assembled at European Organization for Nuclear Research (CERN) with one copper coil, two low-grade coils, and one rejected coil. Coil dimensions were measured with a portable coordinate measurement machine. The coil pack shimming was designed in order to optimize the field quality and the contacts between the coils and the collars. The azimuthal preload target was defined using the short models experience. The mechanical behavior during loading was monitored by means of strain gauges. The results of this study demonstrated that the structure can provide the required prestress to the coils.

Authors:

^[1];

^[2]; Anderssen, Eric ^[1];

^[3];

^[1]; Ferracin, Paolo ^[3]; Grosclaude, Philippe ^[3]; Guinchard, Michael ^[3];

^[3];

^[1];

^[3];

^[1]; Perez, Juan Carlos ^[3];

^[1]; Semeraro, Michela ^[3]; Triquet, Stephane ^[3]

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)

Publication Date:: Thu Jan 10 00:00:00 EST 2019

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1561944

Alternate Identifier(s):: OSTI ID: 1498557

Report Number(s):: FERMILAB-PUB-19-053; FERMILAB-PUB-19-053-TD
Journal ID: ISSN 1051-8223; ark:/13030/qt6zr4w07d; TRN: US2000666

Grant/Contract Number:: AC02-05CH11231; AC02-07CH11359

Resource Type:: Accepted Manuscript

Journal Name:: IEEE Transactions on Applied Superconductivity

Additional Journal Information:: Journal Volume: 29; Journal Issue: 5; Journal ID: ISSN 1051-8223

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

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; High Luminosity LHC; Low- quadrupole; Nb3Sn magnet; Mechanical Model; 43 PARTICLE ACCELERATORS

Citation Formats


                    Vallone, Giorgio, Ambrosio, Giorgio, Anderssen, Eric, Bourcey, Nicolas, Cheng, Daniel W., Ferracin, Paolo, Grosclaude, Philippe, Guinchard, Michael, Bermudez, Susana Izquierdo, Juchno, Mariusz, Lackner, Friedrich, Pan, Heng, Perez, Juan Carlos, Prestemon, Soren, Semeraro, Michela, and Triquet, Stephane. Assembly of a Mechanical Model of MQXFB, the 7.2-m-Long Low-$\beta$ Quadrupole for the High-Luminosity LHC Upgrade.  United States: N. p., 2019. 
Web.  doi:10.1109/tasc.2019.2892126.

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                    Vallone, Giorgio, Ambrosio, Giorgio, Anderssen, Eric, Bourcey, Nicolas, Cheng, Daniel W., Ferracin, Paolo, Grosclaude, Philippe, Guinchard, Michael, Bermudez, Susana Izquierdo, Juchno, Mariusz, Lackner, Friedrich, Pan, Heng, Perez, Juan Carlos, Prestemon, Soren, Semeraro, Michela, & Triquet, Stephane. Assembly of a Mechanical Model of MQXFB, the 7.2-m-Long Low-$\beta$ Quadrupole for the High-Luminosity LHC Upgrade.  United States.  https://doi.org/10.1109/tasc.2019.2892126

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                    Vallone, Giorgio, Ambrosio, Giorgio, Anderssen, Eric, Bourcey, Nicolas, Cheng, Daniel W., Ferracin, Paolo, Grosclaude, Philippe, Guinchard, Michael, Bermudez, Susana Izquierdo, Juchno, Mariusz, Lackner, Friedrich, Pan, Heng, Perez, Juan Carlos, Prestemon, Soren, Semeraro, Michela, and Triquet, Stephane. Thu .  
"Assembly of a Mechanical Model of MQXFB, the 7.2-m-Long Low-$\beta$ Quadrupole for the High-Luminosity LHC Upgrade".  United States.  https://doi.org/10.1109/tasc.2019.2892126.  https://www.osti.gov/servlets/purl/1561944.

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@article{osti_1561944,

  title        = {Assembly of a Mechanical Model of MQXFB, the 7.2-m-Long Low-$\beta$ Quadrupole for the High-Luminosity LHC Upgrade},

  author       = {Vallone, Giorgio and Ambrosio, Giorgio and Anderssen, Eric and Bourcey, Nicolas and Cheng, Daniel W. and Ferracin, Paolo and Grosclaude, Philippe and Guinchard, Michael and Bermudez, Susana Izquierdo and Juchno, Mariusz and Lackner, Friedrich and Pan, Heng and Perez, Juan Carlos and Prestemon, Soren and Semeraro, Michela and Triquet, Stephane},

  abstractNote = {The Nb3Sn low-$β$ quadrupole MQXF is being developed as a part of the High-Luminosity large hadron collider (LHC) upgrade project. The magnet will be produced in two different configurations, sharing the same cross section but with different lengths. A 7.2-m mechanical model of MQXFB was recently assembled at European Organization for Nuclear Research (CERN) with one copper coil, two low-grade coils, and one rejected coil. Coil dimensions were measured with a portable coordinate measurement machine. The coil pack shimming was designed in order to optimize the field quality and the contacts between the coils and the collars. The azimuthal preload target was defined using the short models experience. The mechanical behavior during loading was monitored by means of strain gauges. The results of this study demonstrated that the structure can provide the required prestress to the coils.},

  doi          = {10.1109/tasc.2019.2892126},

  journal      = {IEEE Transactions on Applied Superconductivity},

  number       = 5,

  volume       = 29,

  place        = {United States},

  year         = {Thu Jan 10 00:00:00 EST 2019},

  month        = {Thu Jan 10 00:00:00 EST 2019}

}

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Figure 1: MQXF cross-section (top), and MQXFB longitudinal view (bottom). The strain gauges were installed on the shell and the winding poles, as shown by the circular markers. The vertical lines in the bottom view provide their longitudinal position.

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