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Title: Nb 3 Sn superconducting radiofrequency cavities: fabrication, results, properties, and prospects

Journal Article · · Superconductor Science and Technology

A microns-thick film of Nb3Sn on the inner surface of a superconducting radiofrequency (SRF) cavity has been demonstrated to substantially improve cryogenic efficiency compared to the standard niobium material, and its predicted superheating field is approximately twice as high. We review in detail the advantages of Nb3Sn coatings for SRF cavities. We describe the vapor diffusion process used to fabricate this material in the most successful experiments, and we compare the differences in the process used at different labs. We overview results of Nb3Sn SRF coatings, including CW and pulsed measurements of cavities as well as microscopic measurements. We discuss special considerations that must be practised when using Nb3Sn cavities in applications. Lastly, we conclude by summarizing the state-of-the-art and describing the outlook for this alternative SRF material.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-07CH11359; SC0008431
OSTI ID:
1341257
Alternate ID(s):
OSTI ID: 1341258; OSTI ID: 1353387
Report Number(s):
FERMILAB-PUB-17-133-TD
Journal Information:
Superconductor Science and Technology, Journal Name: Superconductor Science and Technology Vol. 30 Journal Issue: 3; ISSN 0953-2048
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 91 works
Citation information provided by
Web of Science

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Study on the area ratio of Nb–Sn target for the preparation of Nb3Sn films journal July 2019
HE-LHC : The High-Energy Large Hadron Collider text January 2019
FCC-ee: The Lepton Collider text January 2019
Development of sputtered Nb 3 Sn films on copper substrates for superconducting radiofrequency applications journal January 2019
Initial growth of tin on niobium for vapor diffusion coating of Nb 3 Sn journal March 2019
Critical fields of Nb 3 Sn prepared for superconducting cavities journal May 2019
Record high-gradient SRF beam acceleration at Fermilab journal November 2018