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  Garcia Diaz, V.; Azzolini, O.; Chyhyrynets, E.; Keppel, G.; Stivanello, F.; Zanierato, M.; Pira, C.; Fonnesu, D.; Kugeler, O.; Tikhonov, D.; Valizadeh, R.; Vogel, M.: Thick Film Morphology and SC Characterizations of 6 GHz Nb/Cu Cavities. In: Kenji Saito ... [Ed.] : SRF2021 : Proceedings of the 20th International Conference on RF Superconductivity, virtuell, 27 June 2021 to 2 July 2021Geneve: JACoW, 2022. - ISBN 978-3-95450-233-2, p. SUPCAV007/1-5

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Abstract:
Thick films deposited in long pulse DCMS mode onto 6 GHz copper cavities have demonstrated the mitigation of the Q-slope at low accelerating fields. The Nb thick films (~40 microns) show the possibility to reproduce the bulk niobium superconducting properties and morphology characterizations exhibited dense and void-free films that are encouraging for the scaling of the process to 1.3 GHz cavities. In this work a full characterization of thick films by DC magnetometry, computer tomography, SEM and RF characterizations are presented.