Quench protection studies of the 11-T Nb3Sn dipole for the LHC upgrade

Bermudez, Susana Izquierdo; Auchmann, Bernhard; Bajas, Hugues; Bajko, Marta; Bordini, Bernardo; Bottura, Luca; Chlachidze, Guram; Karppinen, Mikko; Rysti, Juho; Savary, Frederic; Willering, Gerard; Zlobin, Alexander V.

doi:10.1109/TASC.2016.2536653

Title: Quench protection studies of the 11-T Nb₃Sn dipole for the LHC upgrade

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Abstract

The planned upgrade of the LHC collimation system foresees additional collimators to be installed in the dispersion suppressor areas. Fermilab and CERN are developing an 11 T Nb₃Sn dipole to replace some 8.33 T-15-m-long Nb-Ti LHC main dipoles providing longitudinal space for the collimators. In case of a quench, the large stored energy and the low copper stabilizer fraction make the protection of the 11 T Nb₃Sn dipoles challenging. This paper presents the results of quench protection analysis, including quench protection heater design and efficiency, quench propagation and coil heating. The numerical results are compared with the experimental data from the 2-m-long Nb₃Sn dipole models. Here, the validated model is used to predict the current decay and hot spot temperature under operating conditions in the LHC and the presently foreseen magnet protection scheme is discussed.

Authors:

Bermudez, Susana Izquierdo ^[1]; Auchmann, Bernhard ^[1]; Bajas, Hugues ^[1]; Bajko, Marta ^[1]; Bordini, Bernardo ^[1]; Bottura, Luca ^[1]; Chlachidze, Guram ^[2]; Karppinen, Mikko ^[1]; Rysti, Juho ^[1]; Savary, Frederic ^[1]; Willering, Gerard ^[1]; Zlobin, Alexander V. ^[2]

European Organization for Nuclear Research (CERN), Geneva (Switzerland)
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Publication Date:: Wed Jun 01 00:00:00 EDT 2016

Research Org.:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

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

OSTI Identifier:: 1327422

Report Number(s):: FERMILAB-PUB-16-399-TD
Journal ID: ISSN 1051-8223; 1425906

Grant/Contract Number:: AC02-07CH11359

Resource Type:: Accepted Manuscript

Journal Name:: IEEE Transactions on Applied Superconductivity

Additional Journal Information:: Journal Volume: 26; 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; LHC upgrade; quench protection; high field accelerator magnets; delays; resistance heating; superconducting magnets; Large Hadron Collider; temperature measurement; conductors

Citation Formats


                    Bermudez, Susana Izquierdo, Auchmann, Bernhard, Bajas, Hugues, Bajko, Marta, Bordini, Bernardo, Bottura, Luca, Chlachidze, Guram, Karppinen, Mikko, Rysti, Juho, Savary, Frederic, Willering, Gerard, and Zlobin, Alexander V. Quench protection studies of the 11-T Nb3Sn dipole for the LHC upgrade.  United States: N. p., 2016. 
Web.  doi:10.1109/TASC.2016.2536653.

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                    Bermudez, Susana Izquierdo, Auchmann, Bernhard, Bajas, Hugues, Bajko, Marta, Bordini, Bernardo, Bottura, Luca, Chlachidze, Guram, Karppinen, Mikko, Rysti, Juho, Savary, Frederic, Willering, Gerard, & Zlobin, Alexander V. Quench protection studies of the 11-T Nb3Sn dipole for the LHC upgrade.  United States.  https://doi.org/10.1109/TASC.2016.2536653

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                    Bermudez, Susana Izquierdo, Auchmann, Bernhard, Bajas, Hugues, Bajko, Marta, Bordini, Bernardo, Bottura, Luca, Chlachidze, Guram, Karppinen, Mikko, Rysti, Juho, Savary, Frederic, Willering, Gerard, and Zlobin, Alexander V. Wed .  
"Quench protection studies of the 11-T Nb3Sn dipole for the LHC upgrade".  United States.  https://doi.org/10.1109/TASC.2016.2536653.  https://www.osti.gov/servlets/purl/1327422.

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@article{osti_1327422,

  title        = {Quench protection studies of the 11-T Nb3Sn dipole for the LHC upgrade},

  author       = {Bermudez, Susana Izquierdo and Auchmann, Bernhard and Bajas, Hugues and Bajko, Marta and Bordini, Bernardo and Bottura, Luca and Chlachidze, Guram and Karppinen, Mikko and Rysti, Juho and Savary, Frederic and Willering, Gerard and Zlobin, Alexander V.},

  abstractNote = {The planned upgrade of the LHC collimation system foresees additional collimators to be installed in the dispersion suppressor areas. Fermilab and CERN are developing an 11 T Nb3Sn dipole to replace some 8.33 T-15-m-long Nb-Ti LHC main dipoles providing longitudinal space for the collimators. In case of a quench, the large stored energy and the low copper stabilizer fraction make the protection of the 11 T Nb3Sn dipoles challenging. This paper presents the results of quench protection analysis, including quench protection heater design and efficiency, quench propagation and coil heating. The numerical results are compared with the experimental data from the 2-m-long Nb3Sn dipole models. Here, the validated model is used to predict the current decay and hot spot temperature under operating conditions in the LHC and the presently foreseen magnet protection scheme is discussed.},

  doi          = {10.1109/TASC.2016.2536653},

  journal      = {IEEE Transactions on Applied Superconductivity},

  number       = 4,

  volume       = 26,

  place        = {United States},

  year         = {Wed Jun 01 00:00:00 EDT 2016},

  month        = {Wed Jun 01 00:00:00 EDT 2016}

}

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Title: Quench protection studies of the 11-T Nb3Sn dipole for the LHC upgrade

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Title: Quench protection studies of the 11-T Nb₃Sn dipole for the LHC upgrade