26 citations · 71 across the 11 of their papers we have counts for
11 papers
Insight into SRF cavity performance from simulations of Nb's surface oxide dissolution and diffusion
Ryan M. L. McFadden, Rowan Becker, Tobias Junginger
We report simulations of the dissolution and diffusion of Nb's surface oxide layer in vacuum. While this chemical doping process is important for the surface preparation of Nb supe…
Niobium's intrinsic coherence length and penetration depth revisited using low-energy muon spin spectroscopy and secondary-ion mass spectrometry
Ryan M. L. McFadden, Jonathan W. Angle, Eric M. Lechner +7
We report direct, simultaneous measurements of the London penetration depth () and Bardeen-Cooper-Schrieffer (BCS) coherence length () in oxygen-doped niobium, with impur…
Implantation studies of low-energy positive muons in niobium thin films
Ryan M. L. McFadden, Andreas Suter, Leon Ruf +5
Here we study the range of keV positive muons implanted in NbO( nm)/Nb( nm)/SiO(300 nm)/Si [ = 3.6 nm, 3.3 nm; = 42.0 nm, 60.1 nm] thin films using l…
Superconducting properties of thin film studied via the NMR of implanted Li
Md Asaduzzaman, Ryan M. L. McFadden, Edward Thoeng +10
We report measurements of the normal-state and superconducting properties of thin-film using Li -detected nuclear magnetic resonance (-NMR). In…
Depth-resolved Characterization of Meissner Screening Breakdown in Surface Treated Niobium
Edward Thoeng, Md. Asaduzzaman, Philipp Kolb +12
We report direct measurements of the magnetic field screening at the limits of the Meissner phase for two superconducting Nb samples. The samples are processed with two different s…
Search for inhomogeneous Meissner screening in Nb induced by low-temperature surface treatments
Ryan M. L. McFadden, Tobias Junginger
Empirical surface treatments, such as low-temperature baking (LTB) in a gaseous atmosphere or in vacuum, are important for the surface preparation of Nb superconducting radio frequ…