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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2508.02894 |
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| _version_ | 1866908810670505984 |
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| author | Shakel, Md Sharifuzzaman Eremeev, Grigory V. Valente-Feliciano, Anne-Marie Pudasaini, Uttar Elsayed-Ali, Hani E. |
| author_facet | Shakel, Md Sharifuzzaman Eremeev, Grigory V. Valente-Feliciano, Anne-Marie Pudasaini, Uttar Elsayed-Ali, Hani E. |
| contents | We deposited Nb3Sn film on the inner surface of a 2.6 GHz Nb superconducting radiofrequency (SRF) cavity by co-sputtering using a composite of Nb and Sn tube targets in a DC cylindrical magnetron sputtering system, followed by thermal annealing of the coated cavity. An aluminum mockup cavity, replicating a 2.6 GHz Nb SRF cavity geometry, was utilized to optimize deposition parameters, resulting in co-sputtered Nb-Sn films with Sn content of 32 - 42 at. % on the beam tubes and equator positions. Several annealing conditions were investigated to improve the surface homogeneity of the Nb3Sn film. The best co-sputtered Nb-Sn film was achieved after annealing at 600 C for 6 h, followed by annealing at 950 C for 1 h. The best process was applied to a Nb cavity, which was RF tested in a cryogenic dewar. RF testing of the Nb3Sn-coated cavity demonstrated a superconducting transition temperature (Tc) close to the highest reported, at 17.78 K. The Nb3Sn cavity underwent a light Sn recoating process, followed by additional RF testing, resulting in enhancement of the RF performance, primarily due to improved surface homogeneity of the Nb3Sn coating. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_02894 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Nb3Sn coating of SRF cavity by co-sputtering from a composite target Shakel, Md Sharifuzzaman Eremeev, Grigory V. Valente-Feliciano, Anne-Marie Pudasaini, Uttar Elsayed-Ali, Hani E. Accelerator Physics We deposited Nb3Sn film on the inner surface of a 2.6 GHz Nb superconducting radiofrequency (SRF) cavity by co-sputtering using a composite of Nb and Sn tube targets in a DC cylindrical magnetron sputtering system, followed by thermal annealing of the coated cavity. An aluminum mockup cavity, replicating a 2.6 GHz Nb SRF cavity geometry, was utilized to optimize deposition parameters, resulting in co-sputtered Nb-Sn films with Sn content of 32 - 42 at. % on the beam tubes and equator positions. Several annealing conditions were investigated to improve the surface homogeneity of the Nb3Sn film. The best co-sputtered Nb-Sn film was achieved after annealing at 600 C for 6 h, followed by annealing at 950 C for 1 h. The best process was applied to a Nb cavity, which was RF tested in a cryogenic dewar. RF testing of the Nb3Sn-coated cavity demonstrated a superconducting transition temperature (Tc) close to the highest reported, at 17.78 K. The Nb3Sn cavity underwent a light Sn recoating process, followed by additional RF testing, resulting in enhancement of the RF performance, primarily due to improved surface homogeneity of the Nb3Sn coating. |
| title | Nb3Sn coating of SRF cavity by co-sputtering from a composite target |
| topic | Accelerator Physics |
| url | https://arxiv.org/abs/2508.02894 |