Title |
Effects of Chemical Treatments on the Surface Roughess and Surface Magnetic Field Ehancement of Niobium-3 Tin Films for Superconducting Radio-Frequency Cavities |
Authors |
- R.D. Porter, F. Furuta, D.L. Hall, M. Liepe, J.T. Maniscalco
Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
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Abstract |
Current niobium-3 tin (Nb3Sn) films produced via vapor diffusion have rougher surfaces than typical electropolished niobium surfaces causing significantly enhancement of the surface magnetic fields. Reducing surface roughness of Nb3Sn surfaces may be necessary to achieve higher gradient accelerator cavities with high Q. Previous work at Cornell has shown the impact of several chemical treatments on the surface roughness of Nb3Sn films; however, it had not been evaluated how the changes in surface roughness impact the surface magnetic field enhancement. In this paper we present simulations of the surface field enhancement of oxipolished Nb3Sn, which was shown to be effective at reducing the surface roughness of Nb3Sn. The surface magnetic field enhancement data is compared to those of unetched Nb3Sn to find that the surface magnetic field enhancement (and surface roughness) has been roughly halved.
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Paper |
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Conference |
SRF2017, Lanzhou, China |
Series |
International Conference on RF Superconductivity (18th) |
Proceedings |
Link to full SRF2017 Proccedings |
Session |
Poster Session |
Date |
20-Jul-17 14:00–17:00 |
Main Classification |
Fundamental SRF R&D |
Sub Classification |
Other than bulk Nb |
Keywords |
ion, cavity, niobium, SRF, linac |
Publisher |
JACoW, Geneva, Switzerland |
Editors |
Volker RW Schaa (GSI, Darmstadt, Germany); Yuan He (IMP, Lanzhou, China); Lu Li (IMP, Lanzhou, China); Ning Zhao (IHEP, Beijing, China) |
ISBN |
978-3-95450-191-5 |
Published |
January 2018 |
Copyright |
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