Nb3Sn multicell cavity coating system at Jefferson Lab

Eremeev, G.; Clemens, W.; Macha, K.; Reece, C. E.; Valente-Feliciano, A. M.; Williams, S.; Pudasaini, U.; Kelley, M.

doi:10.1063/1.5144490

Nb₃Sn multicell cavity coating system at Jefferson Lab

Journal Article · Mon Jul 27 04:00:00 EDT 2020 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.5144490· OSTI ID:1644041

^[1]; Clemens, W. ^[1]; Macha, K. ^[1]; ^[1]; ^[1]; Williams, S. ^[1]; ^[2]; ^[2]

Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
College of William and Mary, Williamsburg, VA (United States)

Superconducting radio frequency niobium cavities are the building blocks of modern accelerators for scientific applications. Lower surface resistance, higher fields, and high operating temperatures advance the reach of the future accelerators for scientific discovery as well as potentially enabling cost-effective industrial solutions. We describe the design and performance of an Nb₃Sn coating system that converts the inner surface of niobium cavities to an Nb₃Sn film. The niobium surface, heated by radiation from the niobium retort, is exposed to Sn and SnCl₂ vapor during the heat cycle, which results in about 2 μm Nb₃Sn film on the niobium surface. Film composition and structure as well as radio frequency properties with 1-cell R&D cavities and 5-cell practical accelerator cavities are presented.

Research Organization:: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC05-06OR23177

OSTI ID:: 1644041

Report Number(s):: JLAB-ACC--20-3229; DOE/OR--23177-5011; arXiv-2001.03823

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 7 Vol. 91; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Figures / Tables (7)

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Related Subjects

47 OTHER INSTRUMENTATION
Vacuum apparatus
deposition
mechanical instruments
particle accelerators
radiofrequency cavities
superconductors
thermodynamic states and processes
thin films