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Title: 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. This effect is attributed to the lowering of the Mattis-Bardeen surface resistance with increasing accelerating field; however, the microscopic origin of this phenomenon is poorly understood. Meanwhile, an enhancement of the sensitivity to trapped magnetic field is typically observed for such cavities. In this paper, we conduct a 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 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. These results also provide insights on the physics behind the change in the field dependence of the Mattis-Bardeen surface resistance, and of the trapped magnetic vortex induced losses in superconducting niobium resonators.

Authors:
;  [1];  [2]; ; ; ; ;  [1];  [3]
  1. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
  2. (United States)
  3. Department of Physics, Illinois Institute of Technology, Chicago, Illinois 60616 (United States)
Publication Date:
OSTI Identifier:
22594353
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 109; Journal Issue: 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPARATIVE EVALUATIONS; IMPURITIES; MAGNETIC FIELDS; MICROWAVE RADIATION; NIOBIUM; NITROGEN; RADIOWAVE RADIATION; RESONATORS; SENSITIVITY; SUPERCONDUCTING DEVICES; SURFACE TREATMENTS; SURFACES; TRAPPING; VORTICES; WALLS

Citation Formats

Martinello, M., E-mail: mmartine@fnal.gov, Checchin, M., Department of Physics, Illinois Institute of Technology, Chicago, Illinois 60616, Grassellino, A., 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., E-mail: mmartine@fnal.gov, Checchin, M., Department of Physics, Illinois Institute of Technology, Chicago, Illinois 60616, Grassellino, A., 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. doi:10.1063/1.4960801.
Martinello, M., E-mail: mmartine@fnal.gov, Checchin, M., Department of Physics, Illinois Institute of Technology, Chicago, Illinois 60616, Grassellino, A., 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. doi:10.1063/1.4960801.
@article{osti_22594353,
title = {Effect of interstitial impurities on the field dependent microwave surface resistance of niobium},
author = {Martinello, M., E-mail: mmartine@fnal.gov and Checchin, M. and Department of Physics, Illinois Institute of Technology, Chicago, Illinois 60616 and Grassellino, A. 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. This effect is attributed to the lowering of the Mattis-Bardeen surface resistance with increasing accelerating field; however, the microscopic origin of this phenomenon is poorly understood. Meanwhile, an enhancement of the sensitivity to trapped magnetic field is typically observed for such cavities. In this paper, we conduct a 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 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. These results also provide insights on the physics behind the change in the field dependence of the Mattis-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}
}