23 citations · 149 across the 15 of their papers we have counts for
15 papers
Mid-T Heat Treatments on BCPed Coaxial Cavities at TRIUMF
Philipp Kolb, Zhongyuan Yao, Arthur Blackburn +5
Mid-T heat treatments in the range from 250 to 400 C on superconducting radio-frequency (SRF) cavities have been shown to provide high quality factors that rise with applied rf fie…
Statement from the American Linear Collider Committee to the P5 subpanel
J. A. Bagger, S. Belomestnykh, P. C. Bhat +15
This statement from the American Linear Collider Committee to the P5 subpanel has three purposes. It presents a brief summary of the case for an Higgs factory that has eme…
Comment on "Strong Meissner screening change in superconducting radio frequency cavities due to mild baking" [Appl. Phys. Lett. 104, 072601 (2014)]
Ryan M. L. McFadden, Md Asaduzzaman, Tobias Junginger
In a recent Letter by Romanenko et al., the authors used low-energy muon spin rotation (LE-SR) to measure the Meissner screening profile in cutouts from Nb superconducting radio…
Evidence for current suppression in superconductor-superconductor bilayers
Md Asaduzzaman, Ryan M. L. McFadden, Anne-Marie Valente-Feliciano +5
Superconducting radio frequency (SRF) cavities, which are critical components in many particle accelerators, need to be operated in the Meissner state to avoid strong dissipation f…
Depth-resolved measurements of the Meissner screening profile in surface-treated Nb
Ryan M. L. McFadden, Md Asaduzzaman, Thomas Prokscha +3
We report depth-resolved measurements of the Meissner screening profile in several surface-treated Nb samples using low-energy muon spin rotation (LE-SR). In these experiments,…
A New High Parallel-Field Spectrometer at TRIUMF's -NMR Facility
Edward Thoeng, Ryan M. L. McFadden, Suresh Saminathan +16
A new high field spectrometer has been built to extend the capabilities of the -detected nuclear magnetic resonance (-NMR) facility at TRIUMF. This new beamline extension all…
Next-Generation Superconducting RF Technology based on Advanced Thin Film Technologies and Innovative Materials for Accelerator Enhanced Performance and Energy Reach
A. - M. Valente-Feliciano, C. Antoine, S. Anlage +25
Superconducting RF is a key technology for future particle accelerators, now relying on advanced surfaces beyond bulk Nb for a leap in performance and efficiency. The SRF thin film…
Modelling dielectric loss in superconducting resonators: Evidence for interacting atomic two-level systems at the Nb/oxide interface
N. Gorgichuk, T. Junginger, R. de Sousa
While several experiments claim that two-level system (TLS) defects in amorphous surfaces/interfaces are responsible for energy relaxation in superconducting resonators and qubits,…
Coaxial multi-mode cavities for fundamental SRF research in an unprecedented parameter space
P. Kolb, Z. Yao, T. Junginger +4
Recent developments in superconducting radio-frequency (SRF) research have focused primarily on high frequency elliptical cavities for electron accelerators. Advances have been mad…
High Frequency Nonlinear Response of Superconducting Cavity-Grade Nb surfaces
Bakhrom Oripov, Thomas Bieler, Gianluigi Ciovati +9
Nb Superconducting Radio-Frequency (SRF) cavities are observed to break down and lose their high-Q superconducting properties at accelerating gradients below the limits imposed by…
Field of first flux entry and pinning strength of superconductors for RF application measured with muon spin rotation
T. Junginger, S. H. Abidi, R. Astley +9
The performance of superconducting radiofrequency (SRF) cavities used for particle accelerators depends on two characteristic material parameters: field of first flux entry $H_{ent…
On the field dependent surface resistance of niobium on copper cavities
Tobias Junginger
The surface resistance Rs of superconducting cavities prepared by sputter coating a thin niobium film on a copper substrate increases significantly stronger with the applied RF fie…
Experimental evidence for electric surface resistance in niobium
Tobias Junginger, Sarah Aull, Wolfgang Weingarten +1
Identifying the loss mechanisms of niobium cavities enables an accurate determination of applications for future accelerator projects and points to research topics required to miti…
Extension of the Measurement Capabilities of the Quadrupole Resonator
Tobias Junginger, Wolfgang Weingarten, Carsten Welsch
The Quadrupole Resonator, designed to measure the surface resistance of superconducting samples at 400 MHz has been refurbished. The accuracy of its RF-DC compensation measurement…
Losses in superconducting Niobium Films caused by Interface Tunnel Exchange
Tobias Junginger, Wolfgang Weingarten, Carsten Welsch
Identifying the loss mechanisms of niobium film cavities enables an accurate determination of applications for future accelerator projects and points to research topics required to…