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| URL | https://doi.org/10.18429/JACoW-SRF2025-TUP20 |
|---|---|
| Title | Density-functional theory study of novel recipes to reduce Nb3Sn grain boundary dissipation |
| Authors |
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| Abstract | Previous research has shown that Nb3Sn cavities with tin-rich grain boundaries tend to show significant Q-slope behavior, while cavities with grain boundaries of the “ideal” 25 %-tin composition have higher quality factors and reach higher quench fields. In this paper, we make the case that it is possible to improve the properties of Nb3Sn grain boundaries even further. We use density-functional theory (DFT) to show that the addition of some ternary elements creates Nb3Sn grain boundaries with more bulk-like electronic structure, potentially making them more resistant to magnetic flux entry and dissipation. We discuss next steps toward introducing ternary elements in a post-processing step compatible with existing state-of-the-art Nb3Sn cavity recipes. |
| Paper | download: TUP20.pdf |
| Cite | BibTeX, LaTeX, Text/Word, RIS, EndNote |
| Conference | 22nd International Conference on RF Superconductivity (SRF'25) |
| Series | |
| Location | Tokyo, Japan |
| Date | 18-26 Sep 2025 |
| Publisher | JACoW Publishing, Geneva, Switzerland |
| Editorial Board | Lin Bian (IHEP), Kazuro Furukawa (KEK), Jaeyu Lee (POSTECH), Joele Mira (iThemba LABS), Maurizio Montis (INFN-LNL), Volker R. W. Schaa (GSI), Akihiro Shirakawa (KEK), Akito Uchiyama (Editor-in-Chief, RIKEN) |
| Online ISBN | 978-3-95450-256-1 |
| Online ISSN | 2673-5504 |
| Received | 24 September 2025 |
| Revised | 25 September 2025 |
| Accepted | 25 September 2025 |
| Issued | 08 September 2026 |
| DOI | 10.18429/JACoW-SRF2025-TUP20 |
| Pages | 354-357 |
| Copyright | Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |