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RIS citation export for MOPMB043: Characterization of Dissipative Regions of an N-Doped SRF Cavity

TY  - CONF
AU  - Lechner, E.M.
AU  - Ciovati, G.
AU  - Gurevich, A.V.
AU  - Iavarone, M.
AU  - Makita, J.
AU  - Oli, B.D.
ED  - Saito, Kenji
ED  - Xu, Ting
ED  - Sakamoto, Naruhiko
ED  - Schaa, Volker R.W.
ED  - Thomas, Paul W.
TI  - Characterization of Dissipative Regions of an N-Doped SRF Cavity
J2  - Proc. of SRF2023, Grand Rapids, MI, USA, 25-30 June 2023
CY  - Grand Rapids, MI, USA
T2  - International Conference on RF Superconductivity
T3  - 21
LA  - english
AB  - We report scanning tunneling microscopy measurements on N-doped cavity hot and cold spot cutouts. Analysis of the electron tunneling spectra using a proximity effect theory shows that hot spots have a reduced superconducting gap and a wider distribution of the contact resistance. Alone, these degraded superconducting properties account for a much weaker excess dissipation as compared with the vortex contribution. Based on the correlation between the quasiparticle density of states and temperature mapping, we suggest that degraded superconducting properties may facilitate vortex nucleation or settling of trapped flux during cooling the cavity through the critical temperature.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 202
EP  - 206
KW  - cavity
KW  - niobium
KW  - radio-frequency
KW  - electron
KW  - experiment
DA  - 2023/09
PY  - 2023
SN  - 2673-5504
SN  - 978-3-95450-234-9
DO  - doi:10.18429/JACoW-SRF2023-MOPMB043
UR  - https://jacow.org/srf2023/papers/mopmb043.pdf
ER  -