245 citations · 616 across the 9 of their papers we have counts for
9 papers
Optimizing Superconducting Nb Film Cavities by Mitigating Medium-Field Q-Slope Through Annealing
B. Abdisatarov, G. Eremeev, H. E. Elsayed-Ali +9
Niobium films are of interest in applications in various superconducting devices, such as superconducting radiofrequency cavities for particle accelerators and superconducting qubi…
Quantifying Trapped Magnetic Vortex Losses in Niobium Resonators at mK Temperatures
D. Bafia, B. Abdisatarov, R. Pilipenko +4
Trapped magnetic vortices in niobium introduce microwave losses that degrade the performance of superconducting resonators. While such losses have been extensively studied above 1~…
Performance-defining properties of NbSn coating in SRF cavities
Y. Trenikhina, S. Posen, A. Romanenko +4
NbSn has great potential to become the material of choice for fabrication of SRF cavities. The higher critical temperature of NbSn potentially allows for an increased opera…
Understanding Quality Factor Degradation in Superconducting Niobium Cavities at Low Microwave Field Amplitudes
A. Romanenko, D. I. Schuster
In niobium superconducting radio frequency (SRF) accelerating cavities a decrease of the quality factor at lower fields - a so called \emph{low field Q slope or LFQS} - has been a…
Efficient expulsion of magnetic flux in superconducting RF cavities for high applications
S. Posen, A. Grassellino, A. Romanenko +5
Even when cooled through its transition temperature in the presence of an external magnetic field, a superconductor can expel nearly all external magnetic flux. This Letter present…
Dependence of the residual surface resistance of superconducting RF cavities on the cooling dynamics around
A. Romanenko, A. Grassellino, O. Melnychuk +1
We report a strong effect of the cooling dynamics through on the amount of trapped external magnetic flux in superconducting niobium cavities. The effect is similar…
Nitrogen and argon doping of niobium for superconducting radio frequency cavities: a pathway to highly efficient accelerating structures
A. Grassellino, A. Romanenko, O. Melnychuk +7
We report a surface treatment that systematically improves the quality factor of niobium radio frequency cavities beyond the expected limit for niobium. A combination of annealing…
Fermilab experience of post-annealing losses in SRF niobium cavities due to furnace contamination and the ways to its mitigation: a pathway to processing simplification and quality factor improvement
A. Grassellino, A. Romanenko, A. Crawford +10
We investigate the effect of high temperature treatments followed by only high-pressure water rinse (HPR) of superconducting radio frequency (SRF) niobium cavities. The objective i…
Dependence of the microwave surface resistance of superconducting niobium on the magnitude of the rf field
A. Romanenko, A. Grassellino
Utilizing difference in temperature dependencies we decoupled BCS and residual components of the microwave surface resistance of superconducting niobium at all rf fields up to $B_\…