Nitrogen doping and infusion in SRF cavities: A review
P Dhakal - Physics Open, 2020 - Elsevier
Advances in SRF technology over the last 40 years allowed achieving accelerating
gradients~ 50 MV/m corresponding to peak surface magnetic fields close to the theoretical …
gradients~ 50 MV/m corresponding to peak surface magnetic fields close to the theoretical …
Characterization of dissipative regions of a N-doped superconducting radio-frequency cavity
We report radio-frequency measurements of quality factors and temperature mapping of a
nitrogen doped Nb superconducting RF cavity. Cavity cutouts of hot and cold spots were …
nitrogen doped Nb superconducting RF cavity. Cavity cutouts of hot and cold spots were …
Accelerating gradient improvement in nitrogen-doped superconducting radio-frequency cavities for SHINE
Y Zong, JF Chen, D Wang, QX Chen, ZX Chen… - Nuclear Instruments and …, 2023 - Elsevier
Several state-of-the-art recipes have been studied to pursue high quality factor (Q) and
higher accelerating gradient (E acc) on superconducting radio-frequency (SRF) cavities for …
higher accelerating gradient (E acc) on superconducting radio-frequency (SRF) cavities for …
Surface characterization of nitrogen-doped high purity niobium coupons compared with superconducting rf cavity performance
We report the results from the measurements of high purity Nb samples and
superconducting radio-frequency (SRF) cavities doped with nitrogen and followed by either …
superconducting radio-frequency (SRF) cavities doped with nitrogen and followed by either …
[PDF][PDF] Challenges to Reliable Production Nitrogen Doping of Nb for SRF Accelerating Cavities
Over the last several years, alloying of the surface layer of niobium SRF cavities has been
demonstrated to beneficially lower the superconducting RF surface resistance. Nitrogen …
demonstrated to beneficially lower the superconducting RF surface resistance. Nitrogen …
[PDF][PDF] Vacancy-Hydrogen Dynamics and Magnetic Impurities During Mid-T Bake
M Wenskat, C Bate, GDL Semione, A Stierle… - … edited by K. Saito, T. Xu …, 2021 - jacow.org
Positron annihilation measurements allow to study the hydrogen interaction with vacancies
in a crystal lattice. Furthermore, the 3𝛾/2𝛾 ratio of the positronium annihilation showed local …
in a crystal lattice. Furthermore, the 3𝛾/2𝛾 ratio of the positronium annihilation showed local …
[PDF][PDF] A SIMS Approach for the Analysis of Furnace Contamination
Detection of surface contamination for SRF material is difficult due to the miniscule quantities
and near atomic resolution needed. Visual inspection of samples known to have …
and near atomic resolution needed. Visual inspection of samples known to have …
Electropolishing study on nitrogen-doped niobium surface
The nitrogen doping (N-doping) process is applied to niobium (Nb) superconducting cavities
to enhance their quality factors. The N-doping is followed by an electropolishing process that …
to enhance their quality factors. The N-doping is followed by an electropolishing process that …
Topographic Evolution of Nb Surfaces Subjected to Electropolishing
EM Lechner, CG Baxley, MJ Kelley, CE Reece… - 2023 - osti.gov
Surface quality plays an important role in the performance of SRF cavities. We report the
topographic evolution of H degassed, N and O doped Nb surfaces subjected to …
topographic evolution of H degassed, N and O doped Nb surfaces subjected to …
Topographic Evolution of Nitrogen Doped Nb Subjected to Electropolishing
Surface quality is paramount in facilitating high per-formance SRF cavity operation. Here we
investigate the topographic evolution of samples subjected to N doping and 600° C vacuum …
investigate the topographic evolution of samples subjected to N doping and 600° C vacuum …