Effect of interstitial impurities on the field dependent microwave surface resistance of niobium
Abstract
Previous work has demonstrated that the radio frequency surface resistance of niobium resonators is dramatically reduced when nitrogen impurities are dissolved as interstitial in the material. The origin of this effect is attributed to the lowering of the Mattis and Bardeen surface resistance contribution with increasing accelerating field. Meanwhile, an enhancement of the sensitivity to trapped magnetic field is typically observed for such cavities. In this paper we conduct the first systematic study on these different components contributing to the total surface resistance as a function of different levels of dissolved nitrogen, in comparison with standard surface treatments for niobium resonators. Adding these results together we are able to show for the first time which is the optimum surface treatment that maximizes the Q-factor of superconducting niobium resonators as a function of expected trapped magnetic field in the cavity walls. Lastly, these results also provide new insights on the physics behind the change in the field dependence of the Mattis and Bardeen surface resistance, and of the trapped magnetic vortex induced losses in superconducting niobium resonators.
- Authors:
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1287756
- Alternate Identifier(s):
- OSTI ID: 1325211; OSTI ID: 1420656
- Report Number(s):
- arXiv:1606.04174; FERMILAB-PUB-16-362-TD
Journal ID: ISSN 0003-6951
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Published Article
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Name: Applied Physics Letters Journal Volume: 109 Journal Issue: 6; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; BCS theory; surface finishing; cavitation; niobium; magnetic fields
Citation Formats
Martinello, M., Grassellino, A., Checchin, M., Romanenko, A., Melnychuk, O., Sergatskov, D. A., Posen, S., and Zasadzinski, J. F. Effect of interstitial impurities on the field dependent microwave surface resistance of niobium. United States: N. p., 2016.
Web. doi:10.1063/1.4960801.
Martinello, M., Grassellino, A., Checchin, M., Romanenko, A., Melnychuk, O., Sergatskov, D. A., Posen, S., & Zasadzinski, J. F. Effect of interstitial impurities on the field dependent microwave surface resistance of niobium. United States. https://doi.org/10.1063/1.4960801
Martinello, M., Grassellino, A., Checchin, M., Romanenko, A., Melnychuk, O., Sergatskov, D. A., Posen, S., and Zasadzinski, J. F. Mon .
"Effect of interstitial impurities on the field dependent microwave surface resistance of niobium". United States. https://doi.org/10.1063/1.4960801.
@article{osti_1287756,
title = {Effect of interstitial impurities on the field dependent microwave surface resistance of niobium},
author = {Martinello, M. and Grassellino, A. and Checchin, M. and Romanenko, A. and Melnychuk, O. and Sergatskov, D. A. and Posen, S. and Zasadzinski, J. F.},
abstractNote = {Previous work has demonstrated that the radio frequency surface resistance of niobium resonators is dramatically reduced when nitrogen impurities are dissolved as interstitial in the material. The origin of this effect is attributed to the lowering of the Mattis and Bardeen surface resistance contribution with increasing accelerating field. Meanwhile, an enhancement of the sensitivity to trapped magnetic field is typically observed for such cavities. In this paper we conduct the first systematic study on these different components contributing to the total surface resistance as a function of different levels of dissolved nitrogen, in comparison with standard surface treatments for niobium resonators. Adding these results together we are able to show for the first time which is the optimum surface treatment that maximizes the Q-factor of superconducting niobium resonators as a function of expected trapped magnetic field in the cavity walls. Lastly, these results also provide new insights on the physics behind the change in the field dependence of the Mattis and Bardeen surface resistance, and of the trapped magnetic vortex induced losses in superconducting niobium resonators.},
doi = {10.1063/1.4960801},
journal = {Applied Physics Letters},
number = 6,
volume = 109,
place = {United States},
year = {Mon Aug 08 00:00:00 EDT 2016},
month = {Mon Aug 08 00:00:00 EDT 2016}
}
https://doi.org/10.1063/1.4960801
Web of Science
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Works referencing / citing this record:
Niobium near-surface composition during nitrogen infusion relevant for superconducting radio-frequency cavities
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