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Autore/i: Marcelli A. et al.
Titolo: Nb superconductive thin film coating on flat Cu disks for high gradient applications
Numero: INFN-19-15/LNF
Data: 19-07-2019
PACS:
Pubblicato su:
PDF file: INFN-19-15-LNF.pdf
URL:
Abstract: In this work we present the characterization of Nb superconductive films deposed on
copper substrates with two different techniques: the PVD magnetron sputtering and the
Pulsed Laser Ablation. In the first method Nb films ~3 μm thick were deposited with
an average roughness of 160 nm. The superconductivity properties of these films were
also determined with a 4-probe resistivity measurement. Data show a superconducting
transition at 9.6Κ as expected from Nb films. With the second technique thick Nb films
were deposited on copper substrates using the Pulsed Laser Ablation. In this case the
Rutherford Backscattering was used to determine the thickness and the chemical state of
these films that show different degrees of oxidation.

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