Mechanical qualification of the support structure for MQXF, the Nb3Sn low-β quadrupole for the high luminosity LHC

Juchno, M.; Ambrosio, G.; Anerella, M.; Bajas, H.; Bajko, M.; Bourcey, N.; Cheng, D. W.; Felice, H.; Ferracin, P.; Grosclaude, P.; Guinchard, M.; Perez, J. C.; Prin, H.; Schmalzle, J.

doi:10.1109/TASC.2016.2521893

Title: Mechanical qualification of the support structure for MQXF, the Nb₃Sn low-β quadrupole for the high luminosity LHC

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Abstract

Within the scope of the High-Luminosity LHC project, the collaboration between CERN and U.S. LARP is developing new low-$$\beta$$ quadrupoles using the Nb 3 Sn superconducting technology for the upgrade of the LHC interaction regions. The magnet support structure of the first short model was designed, and two units were fabricated and tested at CERN and at LBNL. The structure provides the preload to the collar-coil subassembly by an arrangement of outer aluminum shells pretensioned with water-pressurized bladders. For the mechanical qualification of the structure and the assembly procedure, superconducting coils were replaced with solid aluminum 'dummy coils,' and the structure was preloaded at room temperature and then cooled-down to 77 K. The mechanical behavior of the magnet structure was monitored with the use of strain gauges installed on the aluminum shells, the dummy coils, and the axial preload system. This paper reports on the outcome of the assembly and the cooldown tests with dummy coils, which were performed at CERN and at LBNL, and presents the strain gauge measurements compared with the 3-D finite-element model predictions.

Authors:

Juchno, M. ^[1]; Ambrosio, G. ^[2]; Anerella, M. ^[3]; Bajas, H. ^[1]; Bajko, M. ^[1]; Bourcey, N. ^[1]; Cheng, D. W. ^[4]; Felice, H. ^[4]; Ferracin, P. ^[1]; Grosclaude, P. ^[1]; Guinchard, M. ^[1]; Perez, J. C. ^[1]; Prin, H. ^[1]; Schmalzle, J. ^[3]

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

Publication Date:: Tue Jan 26 00:00:00 EST 2016

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

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

Contributing Org.:: LARP

OSTI Identifier:: 1249204

Alternate Identifier(s):: OSTI ID: 1454467

Report Number(s):: FERMILAB-PUB-16-052-TD
Journal ID: ISSN 1051-8223; 1432646

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

Resource Type:: Accepted Manuscript

Journal Name:: IEEE Transactions on Applied Superconductivity

Additional Journal Information:: Journal Volume: 815; Journal Issue: C; Journal ID: ISSN 1051-8223

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

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; high luminosity LHC; low-β quadrupoles; Nb₃Sn magnets; short model; support structure

Citation Formats


                    Juchno, M., Ambrosio, G., Anerella, M., Bajas, H., Bajko, M., Bourcey, N., Cheng, D. W., Felice, H., Ferracin, P., Grosclaude, P., Guinchard, M., Perez, J. C., Prin, H., and Schmalzle, J. Mechanical qualification of the support structure for MQXF, the Nb3Sn low-β quadrupole for the high luminosity LHC.  United States: N. p., 2016. 
Web.  doi:10.1109/TASC.2016.2521893.

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                    Juchno, M., Ambrosio, G., Anerella, M., Bajas, H., Bajko, M., Bourcey, N., Cheng, D. W., Felice, H., Ferracin, P., Grosclaude, P., Guinchard, M., Perez, J. C., Prin, H., & Schmalzle, J. Mechanical qualification of the support structure for MQXF, the Nb3Sn low-β quadrupole for the high luminosity LHC.  United States.  https://doi.org/10.1109/TASC.2016.2521893

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                    Juchno, M., Ambrosio, G., Anerella, M., Bajas, H., Bajko, M., Bourcey, N., Cheng, D. W., Felice, H., Ferracin, P., Grosclaude, P., Guinchard, M., Perez, J. C., Prin, H., and Schmalzle, J. Tue .  
"Mechanical qualification of the support structure for MQXF, the Nb3Sn low-β quadrupole for the high luminosity LHC".  United States.  https://doi.org/10.1109/TASC.2016.2521893.  https://www.osti.gov/servlets/purl/1249204.

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@article{osti_1249204,

  title        = {Mechanical qualification of the support structure for MQXF, the Nb3Sn low-β quadrupole for the high luminosity LHC},

  author       = {Juchno, M. and Ambrosio, G. and Anerella, M. and Bajas, H. and Bajko, M. and Bourcey, N. and Cheng, D. W. and Felice, H. and Ferracin, P. and Grosclaude, P. and Guinchard, M. and Perez, J. C. and Prin, H. and Schmalzle, J.},

  abstractNote = {Within the scope of the High-Luminosity LHC project, the collaboration between CERN and U.S. LARP is developing new low-$\beta$ quadrupoles using the Nb 3 Sn superconducting technology for the upgrade of the LHC interaction regions. The magnet support structure of the first short model was designed, and two units were fabricated and tested at CERN and at LBNL. The structure provides the preload to the collar-coil subassembly by an arrangement of outer aluminum shells pretensioned with water-pressurized bladders. For the mechanical qualification of the structure and the assembly procedure, superconducting coils were replaced with solid aluminum 'dummy coils,' and the structure was preloaded at room temperature and then cooled-down to 77 K. The mechanical behavior of the magnet structure was monitored with the use of strain gauges installed on the aluminum shells, the dummy coils, and the axial preload system. This paper reports on the outcome of the assembly and the cooldown tests with dummy coils, which were performed at CERN and at LBNL, and presents the strain gauge measurements compared with the 3-D finite-element model predictions.},

  doi          = {10.1109/TASC.2016.2521893},

  journal      = {IEEE Transactions on Applied Superconductivity},

  number       = C,

  volume       = 815,

  place        = {United States},

  year         = {Tue Jan 26 00:00:00 EST 2016},

  month        = {Tue Jan 26 00:00:00 EST 2016}

}

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Title: Mechanical qualification of the support structure for MQXF, the Nb3Sn low-β quadrupole for the high luminosity LHC

Abstract

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Title: Mechanical qualification of the support structure for MQXF, the Nb₃Sn low-β quadrupole for the high luminosity LHC