Critical fields of Nb 3 Sn prepared for superconducting cavities
Abstract
Nb$$_3$$Sn is currently the most promising material other than niobium for future superconducting radiofrequency cavities. Critical fields above 120 mT in pulsed operation and about 80 mT in CW have been achieved in cavity tests. This is large compared to the lower critical field as derived from the London penetration depth, extracted from low field surface impedance measurements. In this paper direct measurements of the London penetration depth from which the lower critical field and the superheating field are derived are presented. The field of first vortex penetration is measured under DC and RF fields. The combined results confirm that Nb$$_3$$Sn cavities are indeed operated in a metastable state above the lower critical field but are currently limited to a critical field well below the superheating field.
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1528668
- Alternate Identifier(s):
- OSTI ID: 1543265
- Report Number(s):
- arXiv:1810.13301; FERMILAB-PUB-18-778-TD
Journal ID: ISSN 0953-2048
- Grant/Contract Number:
- SC0008431; AC02-07CH11359
- Resource Type:
- Published Article
- Journal Name:
- Superconductor Science and Technology
- Additional Journal Information:
- Journal Name: Superconductor Science and Technology Journal Volume: 32 Journal Issue: 7; Journal ID: ISSN 0953-2048
- Publisher:
- IOP Publishing
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; superconducting radio frequency; niobium-tin; superconductivity; superheating; critical fields
Citation Formats
Keckert, S., Junginger, T., Buck, T., Hall, D., Kolb, P., Kugeler, O., Laxdal, R., Liepe, M., Posen, S., Prokscha, T., Salman, Z., Suter, A., and Knobloch, J. Critical fields of Nb 3 Sn prepared for superconducting cavities. United Kingdom: N. p., 2019.
Web. doi:10.1088/1361-6668/ab119e.
Keckert, S., Junginger, T., Buck, T., Hall, D., Kolb, P., Kugeler, O., Laxdal, R., Liepe, M., Posen, S., Prokscha, T., Salman, Z., Suter, A., & Knobloch, J. Critical fields of Nb 3 Sn prepared for superconducting cavities. United Kingdom. https://doi.org/10.1088/1361-6668/ab119e
Keckert, S., Junginger, T., Buck, T., Hall, D., Kolb, P., Kugeler, O., Laxdal, R., Liepe, M., Posen, S., Prokscha, T., Salman, Z., Suter, A., and Knobloch, J. Thu .
"Critical fields of Nb 3 Sn prepared for superconducting cavities". United Kingdom. https://doi.org/10.1088/1361-6668/ab119e.
@article{osti_1528668,
title = {Critical fields of Nb 3 Sn prepared for superconducting cavities},
author = {Keckert, S. and Junginger, T. and Buck, T. and Hall, D. and Kolb, P. and Kugeler, O. and Laxdal, R. and Liepe, M. and Posen, S. and Prokscha, T. and Salman, Z. and Suter, A. and Knobloch, J.},
abstractNote = {Nb$_3$Sn is currently the most promising material other than niobium for future superconducting radiofrequency cavities. Critical fields above 120 mT in pulsed operation and about 80 mT in CW have been achieved in cavity tests. This is large compared to the lower critical field as derived from the London penetration depth, extracted from low field surface impedance measurements. In this paper direct measurements of the London penetration depth from which the lower critical field and the superheating field are derived are presented. The field of first vortex penetration is measured under DC and RF fields. The combined results confirm that Nb$_3$Sn cavities are indeed operated in a metastable state above the lower critical field but are currently limited to a critical field well below the superheating field.},
doi = {10.1088/1361-6668/ab119e},
journal = {Superconductor Science and Technology},
number = 7,
volume = 32,
place = {United Kingdom},
year = {Thu May 23 00:00:00 EDT 2019},
month = {Thu May 23 00:00:00 EDT 2019}
}
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https://doi.org/10.1088/1361-6668/ab119e
https://doi.org/10.1088/1361-6668/ab119e
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