Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA (United States)
North Carolina State University, Raleigh, NC (United States)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA (United States)
We generalize a native Nb2O5 dissolution model [G. Ciovati, Appl. Phys. Lett. 89, 022507 (2006)] to sequential overlayer dissolutions, multilayer dissolution, and realistic temperature profiles, which may be applicable to other materials. The model is applied to secondary ion mass spectrometry depth profile measurements for varying temperature profiles and two-step oxide dissolution in Nb and found to agree well. In the context of the Meissner screening response due to impurity profiles on the length scale of the London penetration depth, the shallow diffusion of O impurities results in a substantial decrease in the peak supercurrent density near the surface. In this framework, oxide dissolution and oxygen diffusion can account for a rise in peak supportable magnetic field in SRF cavities with baking time and a suppression after the optimal baking time is reached, in good agreement with peak-field baking temperatures and times as well as recent quench field measurements.
Lechner, E. M., et al. "Oxide dissolution and oxygen diffusion scenarios in niobium and implications on the Bean–Livingston barrier in superconducting cavities." Journal of Applied Physics, vol. 135, no. 13, Apr. 2024. https://doi.org/10.1063/5.0191234
Lechner, E. M., Angle, J. W., Palczewski, A. D., Stevie, F. A., Kelley, M. J., & Reece, C. E. (2024). Oxide dissolution and oxygen diffusion scenarios in niobium and implications on the Bean–Livingston barrier in superconducting cavities. Journal of Applied Physics, 135(13). https://doi.org/10.1063/5.0191234
Lechner, E. M., Angle, J. W., Palczewski, A. D., et al., "Oxide dissolution and oxygen diffusion scenarios in niobium and implications on the Bean–Livingston barrier in superconducting cavities," Journal of Applied Physics 135, no. 13 (2024), https://doi.org/10.1063/5.0191234
@article{osti_2333619,
author = {Lechner, E. M. and Angle, J. W. and Palczewski, A. D. and Stevie, F. A. and Kelley, M. J. and Reece, C. E.},
title = {Oxide dissolution and oxygen diffusion scenarios in niobium and implications on the Bean–Livingston barrier in superconducting cavities},
annote = {We generalize a native Nb2O5 dissolution model [G. Ciovati, Appl. Phys. Lett. 89, 022507 (2006)] to sequential overlayer dissolutions, multilayer dissolution, and realistic temperature profiles, which may be applicable to other materials. The model is applied to secondary ion mass spectrometry depth profile measurements for varying temperature profiles and two-step oxide dissolution in Nb and found to agree well. In the context of the Meissner screening response due to impurity profiles on the length scale of the London penetration depth, the shallow diffusion of O impurities results in a substantial decrease in the peak supercurrent density near the surface. In this framework, oxide dissolution and oxygen diffusion can account for a rise in peak supportable magnetic field in SRF cavities with baking time and a suppression after the optimal baking time is reached, in good agreement with peak-field baking temperatures and times as well as recent quench field measurements.},
doi = {10.1063/5.0191234},
url = {https://www.osti.gov/biblio/2333619},
journal = {Journal of Applied Physics},
issn = {ISSN 0021-8979},
number = {13},
volume = {135},
place = {United States},
publisher = {American Institute of Physics (AIP)},
year = {2024},
month = {04}}
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 375, Issue 1-3https://doi.org/10.1016/0168-9002(95)01332-6
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 763https://doi.org/10.1016/j.nima.2014.03.067
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 883https://doi.org/10.1016/j.nima.2017.11.047
Proceedings of the Royal Society of London. Series A - Mathematical and Physical Sciences, Vol. 149, Issue 866, p. 71-88https://doi.org/10.1098/rspa.1935.0048
