Conveners
Nb3Sn Technology: Recent Technical Advances & Scaling Horizons
- Uttar Pudasaini (Jefferson Lab)
Nb3Sn Technology: Recent Technical Advances & Scaling Horizons
- Uttar Pudasaini (Jefferson Lab)
Nb3Sn Technology: Recent Technical Advances & Scaling Horizons
- Cristian Pira (INFN LNL)
Nb3Sn Technology: Recent Technical Advances & Scaling Horizons
- Cristian Pira (INFN LNL)
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Caroline Hain (CERN)22/09/2026, 09:00Nb3Sn Technology: Recent Technical Advances & Scaling Horizons
Nb$_3$Sn coatings on copper offer a promising route beyond established niobium-on-copper (Nb/Cu) thin film superconducting radiofrequency (SRF) cavities, particularly for future accelerators where reducing cryogenic power demand is a key objective. In the Future Circular Collider (FCC) context, Nb$_3$Sn/Cu is being explored as a potential pathway towards operation above 2 K, by exploiting the...
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Dr Matteo Lazzari (INFN LNL)22/09/2026, 09:30Nb3Sn Technology: Recent Technical Advances & Scaling Horizons
Nb₃Sn thin films on copper represent one of the most promising routes for superconducting radio-frequency accelerating cavities for future colliders. At INFN – Legnaro National Laboratories, Nb₃Sn thin films have been successfully deposited on a QPR sample via DC magnetron sputtering, achieving a surface resistance Rs < 9 nΩ. This work presents the design and development of a...
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Reza Valizadeh (STFC)22/09/2026, 09:55Nb3Sn Technology: Recent Technical Advances & Scaling Horizons
Nb3Sn thin film cavities are new generation of superconducting cavities, which have the potential to replace traditional pure niobium cavities owing to their superior theoretical radio frequency (RF) performance. Higher theoretical acceleration gradient and quality factor give Nb3Sn cavities more possibilities in the future. There have been relatively high success in producing such cavities by...
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Felix Kramer (Helmholtz-Zentrum Berlin)22/09/2026, 10:50Nb3Sn Technology: Recent Technical Advances & Scaling Horizons
We present trapped magnetic flux data of Nb3Sn films on copper substrates. The samples are prepared via DC magnetron sputtering and bronze-route. Additionally, we test samples with an insulating layer between substrate and superconductor, which was deposited via atomic layer deposition. By cooling down the sample with various temperature gradients and measuring the resulting trapped magnetic...
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Oliver Kugeler (Helmholtz Zentrum Berlin)22/09/2026, 11:15Nb3Sn Technology: Recent Technical Advances & Scaling Horizons
At Helmholtz-Zentrum Berlin (HZB), the Bronze Route is being developed as an alternative synthesis route for Nb₃Sn thin films on both Nb and Cu substrates. Recent work has focused on optimizing precursor composition, electroplating parameters, substrate preparation, reaction conditions, and post-processing to improve phase purity, microstructure, and superconducting performance. Particular...
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BoHao Zhang (中国科学院近代物理研究所)22/09/2026, 11:40Nb3Sn Technology: Recent Technical Advances & Scaling Horizons
To address the low superconducting transition temperature (Tc) of Cu-based Nb₃Sn films caused by Cu/Sn interdiffusion and thermal mismatch, Ta or Cr barrier layers (0.5/1 μm) together with Nb, Cu, and Sn were deposited on Cu substrates by magnetron sputtering using the bronze method, followed by three-step annealing. All films achieved Tc>17 K (max 17.42 K). The 0.5 μm Cr layer gave the...
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Uttar Pudasaini (Jefferson Lab)22/09/2026, 13:40Nb3Sn Technology: Recent Technical Advances & Scaling Horizons
Nb₃Sn is a promising alternative to bulk niobium for superconducting radio-frequency cavities, offering efficient operation near 4 K with performance comparable to conventional niobium cavities operated at 2 K. At Jefferson Lab, single-cell cavity coating experiments were conducted using the tin vapor diffusion technique while varying key process parameters, including the temperature profile,...
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Liana Shpani22/09/2026, 14:00Nb3Sn Technology: Recent Technical Advances & Scaling Horizons
The performance of Nb3Sn as the next-generation material for SRF cavities is limited by the ability to achieve uniform, dense nucleation during the vapor diffusion growth process. In this work, we study how the Nb surface oxide evolves under UHV annealing, following the temperature profile used in Nb3Sn vapor diffusion growth. By comparing native and anodized oxide surfaces, we investigate how...
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Nikki Tagdulang (Fermilab)22/09/2026, 14:20Nb3Sn Technology: Recent Technical Advances & Scaling Horizons
In this contribution, we present recent progress in the development of Nb₃Sn-coated superconducting radio-frequency (SRF) cavities for continuous-wave, high-gradient applications using the vapor-diffusion coating technique. Several cavities with different geometries and sizes have been successfully coated with Nb₃Sn, including one that achieved an unprecedented peak magnetic field of about 105...
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Vitalii Shcherbinin (RI)22/09/2026, 14:40
Over the past 5 years, R&D activities aimed at the improvement of Nb3Sn coating technologies for SRF systems have gained increasing support from the European Union within projects like iFAST, iSAS and EPITA. The ultimate goal is the development of high-Q Nb3Sn-coated cavities for conduction-cooled cryomodules and further technology commercialization. This requires a significant effort for...
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Uttar Pudasaini (Jefferson Lab)22/09/2026, 15:30Nb3Sn Technology: Recent Technical Advances & Scaling Horizons
Nb₃Sn-coated cavities offer a promising route toward energy-efficient superconducting accelerators operating near 4 K with reduced cryogenic requirements. Gray Enid I, a cryomodule containing two five-cell, 1.5 GHz Nb₃Sn-coated niobium cavities, has completed two beam-acceleration campaigns at Jefferson Lab’s Upgraded Injector Test Facility. During the latest campaign, the cryomodule...
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22/09/2026, 16:00
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Anne-Marie Valente-Feliciano (Jefferson Lab)
Physical Vapor Deposition (PVD) of A15 Nb3Sn thin films on copper (Cu) substrates offers a high-performance pathway for 4.2 K SRF cavity operation, combining higher critical temperatures with the superior thermal stability of Cu. Overcoming challenges related to Cu-Sn interdiffusion, Sn volatility, and low substrate thermal budgets requires tailored deposition dynamics and interface...
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Jiawen Kan (Institute of High Energy Physics, Chinese Academy of Sciences)Nb3Sn Technology: Recent Technical Advances & Scaling Horizons
In this work, a 6 GHz TESLA-shaped cavity was split into two halves along its axis to enable an experimental study following a process flow of half-cell fabrication, surface treatment, film deposition, assembly, and testing. The half-cells were fabricated from high-purity oxygen-free copper by precision machining, and subjected to mechanical polishing followed by SUBU chemical etching prior to...
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Mr Amir Farhood (TU Darmstadt)Nb3Sn Technology: Recent Technical Advances & Scaling Horizons
Nb3Sn, among high Tc conventional superconductors, is the A15 compound class material currently under focus for the development of next-generation superconducting radio-frequency (SRF) cavities. Its high critical temperature (18.2 K) and lower surface resistance compared to Nb, in fact, potentially enable high quality factors while maintaining cryogenic operation at 4.5 K instead of 2 K. Only...
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