Copper stabilization of YBCO coated conductor for quench protection
Abstract
The required amount of copper stabilizer to protect a YBCO conductor coil from damage caused by a hot spot due to a quench is studied in this paper. YBCO coated conductors which are made by deposition of thin YBCO film on high resistance metal substrates are highly resistive when they are quenched. Therefore, stabilization and quench protection are more important for YBCO conductors than Bi/Ag sheathed tapes which have low resistance silver matrix. In the work we numerically calculated maximum temperature rise of a YBCO conductor quenched by a local disturbance during the sequence of quench detection and energy dump. In the analysis, necessary amount of copper to keep the maximum temperature of the conductor below a threshold value is calculated for cases of conduction cooled coils of dry windings. Based on the analysis, optimum conductor design is discussed to protect the coil from a quench reliably.
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Copper cryo-stability is not guaranteed under the effects of irradiation, and copper alloys have demonstrated severe thermal diffusivity degradation and embrittlement post-cryogenic irradiation.
“But these notions of copper cryo-stability are not guaranteed under the effects of irradiation, and copper alloys have demonstrated severe thermal diffusivity degradation and embrittlement post-cryogenic irradiation [27].”
From A facility for thermo-mechanical characterization of fusion magnet materials during cryogenic ion irradiation (2025) · cites this paper as [27]
Within REBCO tapes, the copper stabilizing layer serves as a quench protection mechanism by dissipating heat and providing an alternative current path during transient events.
“Within the constituent REBCO tapes, the copper stabilizing layer also serves as a quench protection mechanism by dissipating heat and providing an alternative current path during transient events [26].”
From A facility for thermo-mechanical characterization of fusion magnet materials during cryogenic ion irradiation (2025) · cites this paper as [26]
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- Authors
- Fu, Y., Tsukamoto, O., & Furuse, M.
- Affiliations
- Yokohama National University (JP)
- National Institute of Advanced Industrial Science and Technology (JP)
- Venue
- IEEE Transactions on Appiled Superconductivity
- Published
- 2003-06
- Volume
- 13
- Issue
- 2
- Pages
- 1780-1783
- ISSN
- 1051-8223 (ISSN-L)
- OpenAlex
- W2102836982
- Cited by
- 35
- References
- 2
- Citations by year
- 2025: 1 · 2024: 1 · 2023: 1 · 2022: 3 · 2020: 2 · 2019: 2 · 2017: 1 · 2016: 1 · 2015: 1 · 2014: 3 · 2013: 1
- FWCI
- 3.16
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- IEEE Transactions on Applied Superconductivity (publishedVersion)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Superconducting Materials and Applications
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Physics of Superconductivity and Magnetism
- Physical Sciences › Engineering › Aerospace Engineering › Particle accelerators and beam dynamics
- Keywords
- YBCO coated conductors, copper stabilizer, quench protection, hot spots, quench detection, temperature rise, conductor design, conduction cooling, high-temperature superconductors
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