Electrodeposition of copper applied to the manufacture of seamless superconducting rf cavities
Niobium thin film coated copper superconducting radio frequency elliptical cavities have demonstrated for many years their strong potential as an alternative to bulk niobium cavities. The thin film lower performance at high rf field is often attributed to the defects observed in the elaborated Nb la...
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2021-08-01
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Series: | Physical Review Accelerators and Beams |
Online Access: | http://doi.org/10.1103/PhysRevAccelBeams.24.082002 |
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doaj-0834e73c5996443f9bccac3ca78c6bc02021-08-16T15:46:52ZengAmerican Physical SocietyPhysical Review Accelerators and Beams2469-98882021-08-0124808200210.1103/PhysRevAccelBeams.24.082002Electrodeposition of copper applied to the manufacture of seamless superconducting rf cavitiesL. Lain AmadorP. ChiggiatoL. M. A. FerreiraE. Garcia-TabaresT. KoettigM. S. MeyerA. T. Perez-FontenlaK. PuthranG. RosazM. TaborelliNiobium thin film coated copper superconducting radio frequency elliptical cavities have demonstrated for many years their strong potential as an alternative to bulk niobium cavities. The thin film lower performance at high rf field is often attributed to the defects observed in the elaborated Nb layer, sometimes originated from defects inherited from the substrate itself. The currently used methods of manufacturing the copper elliptical substrates include several steps of electron-beam welding in order to join the half cells and the cutoffs which can contribute to defects and porosities. Seamless methods are nowadays developed in order to avoid welding steps and to decrease the global manufacturing cost of the cavities. We propose in this study an innovative alternative route in which the cavity is formed by electrodeposition of copper on a sacrificial aluminum mandrel. The strength of the process relies on the total absence of welding joints. Two different electroforming techniques using either direct current or pulsed plating have been investigated. The electroformed copper exhibited similar mechanical robustness, cryogenic properties and purity as the oxygen-free copper. In addition, the fabrication process was validated on test mandrels which mimic the geometry of 1.3 GHz cavities.http://doi.org/10.1103/PhysRevAccelBeams.24.082002 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
L. Lain Amador P. Chiggiato L. M. A. Ferreira E. Garcia-Tabares T. Koettig M. S. Meyer A. T. Perez-Fontenla K. Puthran G. Rosaz M. Taborelli |
spellingShingle |
L. Lain Amador P. Chiggiato L. M. A. Ferreira E. Garcia-Tabares T. Koettig M. S. Meyer A. T. Perez-Fontenla K. Puthran G. Rosaz M. Taborelli Electrodeposition of copper applied to the manufacture of seamless superconducting rf cavities Physical Review Accelerators and Beams |
author_facet |
L. Lain Amador P. Chiggiato L. M. A. Ferreira E. Garcia-Tabares T. Koettig M. S. Meyer A. T. Perez-Fontenla K. Puthran G. Rosaz M. Taborelli |
author_sort |
L. Lain Amador |
title |
Electrodeposition of copper applied to the manufacture of seamless superconducting rf cavities |
title_short |
Electrodeposition of copper applied to the manufacture of seamless superconducting rf cavities |
title_full |
Electrodeposition of copper applied to the manufacture of seamless superconducting rf cavities |
title_fullStr |
Electrodeposition of copper applied to the manufacture of seamless superconducting rf cavities |
title_full_unstemmed |
Electrodeposition of copper applied to the manufacture of seamless superconducting rf cavities |
title_sort |
electrodeposition of copper applied to the manufacture of seamless superconducting rf cavities |
publisher |
American Physical Society |
series |
Physical Review Accelerators and Beams |
issn |
2469-9888 |
publishDate |
2021-08-01 |
description |
Niobium thin film coated copper superconducting radio frequency elliptical cavities have demonstrated for many years their strong potential as an alternative to bulk niobium cavities. The thin film lower performance at high rf field is often attributed to the defects observed in the elaborated Nb layer, sometimes originated from defects inherited from the substrate itself. The currently used methods of manufacturing the copper elliptical substrates include several steps of electron-beam welding in order to join the half cells and the cutoffs which can contribute to defects and porosities. Seamless methods are nowadays developed in order to avoid welding steps and to decrease the global manufacturing cost of the cavities. We propose in this study an innovative alternative route in which the cavity is formed by electrodeposition of copper on a sacrificial aluminum mandrel. The strength of the process relies on the total absence of welding joints. Two different electroforming techniques using either direct current or pulsed plating have been investigated. The electroformed copper exhibited similar mechanical robustness, cryogenic properties and purity as the oxygen-free copper. In addition, the fabrication process was validated on test mandrels which mimic the geometry of 1.3 GHz cavities. |
url |
http://doi.org/10.1103/PhysRevAccelBeams.24.082002 |
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