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Publication Information
Title Managing Sn-supply to tune surface characteristics of vapor-diffusion coating of Nb3Sn
Abstract Nb3Sn promises better RF performance (Q and Eacc) than niobium at any given temperature because of superior superconducting properties. Nb3Sn-coated SRF cavities are now produced routinely by growing a few microns thick Nb3Sn films inside Nb cavities via the tin vapor diffusion technique. Sn evaporation and consumption during the growth process notably affect the quality of the coating. Aiming at favorable surface characteristics that could enhance the RF performance, many coatings were produced by varying Sn sources and temperature profiles. Coupon samples were examined using different material characterization techniques, and a selected few sets of coating parameters were used to coat 1.3 GHz single-cell cavities for RF testing. The Sn supply's careful tuning is essential to manage the microstructure, roughness, and overall surface characteristics of the coating. We summarize the material analysis of witness samples and discuss the performance of several Nb3Sn-coated single-cell cavi
Author(s) Uttar Pudasaini, Charlie Reece, Jayendrika Tiskumara
Publication Date To Appear in 2021
Category SRF Technology
Document Type Meeting
Primary Institution Thomas Jefferson National Accelerator Facility, Newport News
Affiliation Accelerator Ops, R&D / Inst for SRF Sci & Tech / SRF Research & Dev
Funding Source Nuclear Physics (NP)
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: JLAB-ACC-21-3443 OSTI Number: 1905472
LANL Number: Other Number: DOE/OR/23177-5255
Associated with an experiment No
Associated with EIC No
Supported by Jefferson Lab LDRD Funding No
Meeting / Conference
Meeting Name SRF 2021
Meeting Date 6/28/2021
Document Subtype Poster
Attachments/Datasets/DOI Link
Document(s)
Dataset(s) (none)
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