On the mechanical behavior of a Nb3Sn superconducting coil during a quench: Two-dimensional finite element analysis of a quench heater protected magnet
Abstract
New high-field accelerator magnets based on $$Nb_3Sn$$ superconductors are pushing the boundaries of magnet design and quench protection towards new limits. While their large stored energies and current densities result in a very challenging scenario for magnet protection, their great electromagnetic forces create also new requirements in terms of magnet design and stress management techniques. Furthermore, the strain sensitivity of $$Nb_3Sn$$ cables turns the electro-mechanical limits of the conductor into a parameter of the highest importance, where conductor degradation becomes a critical aspect in magnet operation. The coupling of all the above-mentioned considerations during quench is a case of special interest that adds further complexity to the design of $$Nb_3Sn$$ magnets. The objective of this paper is to provide a complete two-dimensional investigation of the coil and magnet structure mechanics during a quench event. Here, the analysis is performed using a combination of finite element codes that provide the necessary input for the mechanical study. The core of the modelling strategy relies on a thermal-electric model, whose results are directly used as loads in the mechanical simulation. In doing so, the stress evolution during and after a quench is obtained. We focus for this time in the analysis of a quench heater protected magnet, where dynamic effects are of less importance in contrast to other protection systems like CLIQ.
- Authors:
-
- Univ. of Geneva (Switzerland); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- European Organization for Nuclear Research (CERN), Geneva (Switzerland)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Barcelona Supercomputing Center (Spain)
- Univ. of Geneva (Switzerland)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- LARP
- OSTI Identifier:
- 1573826
- Report Number(s):
- FERMILAB-PUB-19-454-TD
Journal ID: ISSN 0011-2275; oai:inspirehep.net:1763507; TRN: US2001139
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Cryogenics
- Additional Journal Information:
- Journal Volume: 106; Journal Issue: C; Journal ID: ISSN 0011-2275
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; quench; finite element model; thermal-electric; mechanical
Citation Formats
Troitino, J. Ferradas, Ambrosio, G., Bajas, H., Brouwer, L., Ferracin, P., Bermudez, S. Izquierdo, Gomez, J. V. Lorenzo, Mangiarotti, F. J., Perez, J. C., Ravaioli, E., Taakala, E. Tapani, Vallone, G., and Senatore, C. On the mechanical behavior of a Nb3Sn superconducting coil during a quench: Two-dimensional finite element analysis of a quench heater protected magnet. United States: N. p., 2020.
Web. doi:10.1016/j.cryogenics.2020.103054.
Troitino, J. Ferradas, Ambrosio, G., Bajas, H., Brouwer, L., Ferracin, P., Bermudez, S. Izquierdo, Gomez, J. V. Lorenzo, Mangiarotti, F. J., Perez, J. C., Ravaioli, E., Taakala, E. Tapani, Vallone, G., & Senatore, C. On the mechanical behavior of a Nb3Sn superconducting coil during a quench: Two-dimensional finite element analysis of a quench heater protected magnet. United States. https://doi.org/10.1016/j.cryogenics.2020.103054
Troitino, J. Ferradas, Ambrosio, G., Bajas, H., Brouwer, L., Ferracin, P., Bermudez, S. Izquierdo, Gomez, J. V. Lorenzo, Mangiarotti, F. J., Perez, J. C., Ravaioli, E., Taakala, E. Tapani, Vallone, G., and Senatore, C. Fri .
"On the mechanical behavior of a Nb3Sn superconducting coil during a quench: Two-dimensional finite element analysis of a quench heater protected magnet". United States. https://doi.org/10.1016/j.cryogenics.2020.103054. https://www.osti.gov/servlets/purl/1573826.
@article{osti_1573826,
title = {On the mechanical behavior of a Nb3Sn superconducting coil during a quench: Two-dimensional finite element analysis of a quench heater protected magnet},
author = {Troitino, J. Ferradas and Ambrosio, G. and Bajas, H. and Brouwer, L. and Ferracin, P. and Bermudez, S. Izquierdo and Gomez, J. V. Lorenzo and Mangiarotti, F. J. and Perez, J. C. and Ravaioli, E. and Taakala, E. Tapani and Vallone, G. and Senatore, C.},
abstractNote = {New high-field accelerator magnets based on $Nb_3Sn$ superconductors are pushing the boundaries of magnet design and quench protection towards new limits. While their large stored energies and current densities result in a very challenging scenario for magnet protection, their great electromagnetic forces create also new requirements in terms of magnet design and stress management techniques. Furthermore, the strain sensitivity of $Nb_3Sn$ cables turns the electro-mechanical limits of the conductor into a parameter of the highest importance, where conductor degradation becomes a critical aspect in magnet operation. The coupling of all the above-mentioned considerations during quench is a case of special interest that adds further complexity to the design of $Nb_3Sn$ magnets. The objective of this paper is to provide a complete two-dimensional investigation of the coil and magnet structure mechanics during a quench event. Here, the analysis is performed using a combination of finite element codes that provide the necessary input for the mechanical study. The core of the modelling strategy relies on a thermal-electric model, whose results are directly used as loads in the mechanical simulation. In doing so, the stress evolution during and after a quench is obtained. We focus for this time in the analysis of a quench heater protected magnet, where dynamic effects are of less importance in contrast to other protection systems like CLIQ.},
doi = {10.1016/j.cryogenics.2020.103054},
journal = {Cryogenics},
number = C,
volume = 106,
place = {United States},
year = {Fri Feb 14 00:00:00 EST 2020},
month = {Fri Feb 14 00:00:00 EST 2020}
}
Web of Science
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