8-10 October 2018
INFN - Laboratori Nazionali di Legnaro
Europe/Rome timezone

Tunneling spectroscopy - correlations between superconducting properties and RF performances

10 Oct 2018, 09:25
25m
Villi Room (INFN - Laboratori Nazionali di Legnaro)

Villi Room

INFN - Laboratori Nazionali di Legnaro

Viale dell'Università 2, Legnaro (Padova) - Italy
RF and material characterization for SRF films RF characterization for SRF films

Speaker

Mr Thomas Proslier (Commissariat de l'énergie atomique)

Description

I will present recent analysis of tunneling spectroscopy data measured on cut out samples from a N doped cavity, and from commonly processed hot and cold spot regions of a BCP cavity. The hot spot samples reveal small gap area consistent with a proximity effect model along with spectroscopic signature of magnetic impurities, caracteristic of two level systems. The cold and N doped samples on the contrary show near ideal BCS superconducting properties. From these results and complementary surface characterization technics we can draw general correlations between RF dissipation, inelastic scattering processes and gap values.

Primary author

Mr Thomas Proslier (Commissariat de l'énergie atomique)

Co-authors

Dr Alexander Romanenko (Fermilab) Dr Anna Grassellino (FermiLab) Dr Gianluigi Ciovati (Old Dominion University) Prof. John zasadzinski (Illinois Institute of Technology) Dr Nickolas Groll (Argonne National Laboratory)

Presentation Materials

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