Engineering topics

Elsayed-Ali, H. E. [Old Dominion U.]

Publications and source records attributed to Elsayed-Ali, H. E. [Old Dominion U.].

2 records

DOE OSTI2025

Co-Sputtering of Nb3Sn into SRF Cavity Using Composite Target and Optimizing Surface Homogeneity

Nb₃Sn coating method for superconducting radiofrequency (SRF) cavity has been developed following co-sputtering of Nb-Sn composite target using a DC cylindrical sputter coater. Deposition parameters and annealing strategies were optimized for uniform Nb₃Sn coating. 1.5 m Nb-Sn film was deposited onto 2.6 GHz Nb SRF cavity and annealed at 600 C for 6 h, followed by 950 C for 1 h. Cryogenic RF testing confirmed Nb₃Sn formation with Tc = 17.8 K. A post-annealing light Sn recoating process improved the cavity s performance, achieving Q₀ = 8.5 10⁸ at 2.0 K.

Shakel, M. S. [Old Dominion U.]↗

DOE OSTI2025

A New Route to Improve the Material Quality of Nb3Sn with Zr Inclusion

Nb3Sn superconducting material promises significant potential to exceed the performance of niobium based superconducting radio frequency (SRF) accelerator cavities. With the aim of advancing the ongoing R&D efforts in improving the material quality of Nb3Sn SRF cavities, we studied how the inclusion of Zr in Nb3Sn matrix via co-sputtering process effects the microscopic structure and superconducting properties. Our results suggest co-sputtered Nb3SnZr alloy as a new prospective material platform to further advance the performance limits of SRF cavities.

Tripathi, Malvika [Fermilab]↗