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Title: Performance-defining properties of Nb 3Sn coating in SRF cavities

Abstract

Nb 3Sn has potential to become the material of choice for fabrication of SRF cavities. The higher critical temperature of Nb 3Sn potentially allows for an increased operational temperature in SRF cavities, which could enable a simplification of the cryogenic system, leading to significant cost reduction. We present extended characterization of a Nb 3Sn coated Nb cavity prepared at Cornell University. Using a combination of thermometry during cavity RF measurements, and structural and analytical characterization of the cavity cutouts, we discovered Nb 3Sn coating flaws in regions that exhibit significant heating during the RF testing. Results of extended comparison of cavity cutouts with different dissipation profiles not only indicate the cause of significant Q degradation but also establish figures of merit for material qualities in relation to the quality of SRF performance.

Authors:
 [1]; ORCiD logo [1];  [1];  [2]; ORCiD logo [2];  [3];  [3]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Univ. of Illinois, Urbana, IL (United States). Materials Science and Engineering Dept.
  3. Cornell Univ., Ithaca, NY (United States). Cornell Lab. for Accelerator-Based Sciences and Education
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Cornell Univ., Ithaca, NY (United States); Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); National Science Foundation (NSF)
OSTI Identifier:
1467110
Report Number(s):
FERMILAB-PUB-17-422-TD; arXiv:1707.05856
Journal ID: ISSN 0953-2048; 1610667
Grant/Contract Number:  
AC02-07CH11359; SC0008431; ECCS-1542205; DMR-1121262; PHY-1549132; DMR-1120296
Resource Type:
Accepted Manuscript
Journal Name:
Superconductor Science and Technology
Additional Journal Information:
Journal Volume: 31; Journal Issue: 1; Journal ID: ISSN 0953-2048
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Nb3Sn; SRF materials; films; microscopy

Citation Formats

Trenikhina, Y., Posen, S., Romanenko, A., Sardela, M., Zuo, J.-M., Hall, D. L., and Liepe, M. Performance-defining properties of Nb3Sn coating in SRF cavities. United States: N. p., 2017. Web. doi:10.1088/1361-6668/aa9694.
Trenikhina, Y., Posen, S., Romanenko, A., Sardela, M., Zuo, J.-M., Hall, D. L., & Liepe, M. Performance-defining properties of Nb3Sn coating in SRF cavities. United States. doi:10.1088/1361-6668/aa9694.
Trenikhina, Y., Posen, S., Romanenko, A., Sardela, M., Zuo, J.-M., Hall, D. L., and Liepe, M. Fri . "Performance-defining properties of Nb3Sn coating in SRF cavities". United States. doi:10.1088/1361-6668/aa9694. https://www.osti.gov/servlets/purl/1467110.
@article{osti_1467110,
title = {Performance-defining properties of Nb3Sn coating in SRF cavities},
author = {Trenikhina, Y. and Posen, S. and Romanenko, A. and Sardela, M. and Zuo, J.-M. and Hall, D. L. and Liepe, M.},
abstractNote = {Nb3Sn has potential to become the material of choice for fabrication of SRF cavities. The higher critical temperature of Nb3Sn potentially allows for an increased operational temperature in SRF cavities, which could enable a simplification of the cryogenic system, leading to significant cost reduction. We present extended characterization of a Nb3Sn coated Nb cavity prepared at Cornell University. Using a combination of thermometry during cavity RF measurements, and structural and analytical characterization of the cavity cutouts, we discovered Nb3Sn coating flaws in regions that exhibit significant heating during the RF testing. Results of extended comparison of cavity cutouts with different dissipation profiles not only indicate the cause of significant Q degradation but also establish figures of merit for material qualities in relation to the quality of SRF performance.},
doi = {10.1088/1361-6668/aa9694},
journal = {Superconductor Science and Technology},
number = 1,
volume = 31,
place = {United States},
year = {2017},
month = {10}
}

Journal Article:
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