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Title: Overview of the Quench Heater Performance for MQXF, the Nb 3Sn Low-βQuadrupole for the High Luminosity LHC

Abstract

In the framework of the High-Luminosity upgrade of the Large Hadron Collider, the US LARP collaboration and CERN are jointly developing a 150 mm aperture Nb$$_{3}$$Sn quadrupole for the LHC interaction regions. Due to the large stored energy density and the low copper stabilizer section, the quench protection of these magnets is particularly challenging, relying on a combination of quench heaters attached to the coil surface and CLIQ units electrically connected to the coils. This paper summarizes the performance of the quench heater strips in different configurations relevant to machine operation. The analysis is focused on the inner layer quench heaters, where several heater strips failed during powering tests. Failure modes are discussed in order to address the technology issues and provide guidance for future tests.

Authors:
ORCiD logo [1];  [2];  [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1];  [1];  [1];  [1]; ORCiD logo [3];  [2]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [1]
  1. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1469007
Report Number(s):
FERMILAB-CONF-18-422-TD
Journal ID: ISSN 1051-8223; 1663819
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
IEEE Transactions on Applied Superconductivity
Additional Journal Information:
Journal Volume: 28; Journal Issue: 4; Conference: 13th European Conference on Applied Superconductivity, Geneva (Switzerland), 17-21 Sep 2017; 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; quench protection; high field Nb3Sn magnet

Citation Formats

Bermudez, Susana Izquierdo, Ambrosio, G., Bajas, Hugues, Bourcey, Nicolas, Chlachidze, Guram, Troitino, Jose Ferradas, Ferracin, Paolo, Perez, Juan Carlos, Pincot, Francois-Olivier, Ravaioli, Emmanuele, Santini, Carlo, Stoynev, S., Todesco, Ezio, Sabbi, GianLuca, and Vallone, Giorgio. Overview of the Quench Heater Performance for MQXF, the Nb3Sn Low-βQuadrupole for the High Luminosity LHC. United States: N. p., 2018. Web. doi:10.1109/TASC.2018.2802839.
Bermudez, Susana Izquierdo, Ambrosio, G., Bajas, Hugues, Bourcey, Nicolas, Chlachidze, Guram, Troitino, Jose Ferradas, Ferracin, Paolo, Perez, Juan Carlos, Pincot, Francois-Olivier, Ravaioli, Emmanuele, Santini, Carlo, Stoynev, S., Todesco, Ezio, Sabbi, GianLuca, & Vallone, Giorgio. Overview of the Quench Heater Performance for MQXF, the Nb3Sn Low-βQuadrupole for the High Luminosity LHC. United States. doi:10.1109/TASC.2018.2802839.
Bermudez, Susana Izquierdo, Ambrosio, G., Bajas, Hugues, Bourcey, Nicolas, Chlachidze, Guram, Troitino, Jose Ferradas, Ferracin, Paolo, Perez, Juan Carlos, Pincot, Francois-Olivier, Ravaioli, Emmanuele, Santini, Carlo, Stoynev, S., Todesco, Ezio, Sabbi, GianLuca, and Vallone, Giorgio. Mon . "Overview of the Quench Heater Performance for MQXF, the Nb3Sn Low-βQuadrupole for the High Luminosity LHC". United States. doi:10.1109/TASC.2018.2802839. https://www.osti.gov/servlets/purl/1469007.
@article{osti_1469007,
title = {Overview of the Quench Heater Performance for MQXF, the Nb3Sn Low-βQuadrupole for the High Luminosity LHC},
author = {Bermudez, Susana Izquierdo and Ambrosio, G. and Bajas, Hugues and Bourcey, Nicolas and Chlachidze, Guram and Troitino, Jose Ferradas and Ferracin, Paolo and Perez, Juan Carlos and Pincot, Francois-Olivier and Ravaioli, Emmanuele and Santini, Carlo and Stoynev, S. and Todesco, Ezio and Sabbi, GianLuca and Vallone, Giorgio},
abstractNote = {In the framework of the High-Luminosity upgrade of the Large Hadron Collider, the US LARP collaboration and CERN are jointly developing a 150 mm aperture Nb$_{3}$Sn quadrupole for the LHC interaction regions. Due to the large stored energy density and the low copper stabilizer section, the quench protection of these magnets is particularly challenging, relying on a combination of quench heaters attached to the coil surface and CLIQ units electrically connected to the coils. This paper summarizes the performance of the quench heater strips in different configurations relevant to machine operation. The analysis is focused on the inner layer quench heaters, where several heater strips failed during powering tests. Failure modes are discussed in order to address the technology issues and provide guidance for future tests.},
doi = {10.1109/TASC.2018.2802839},
journal = {IEEE Transactions on Applied Superconductivity},
number = 4,
volume = 28,
place = {United States},
year = {2018},
month = {2}
}

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