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Title: Vortex Dynamics and Losses Due to Pinning: Dissipation from Trapped Magnetic Flux in Resonant Superconducting Radio-Frequency Cavities

Abstract

We use a model of vortex dynamics and collective weak-pinning theory to study the residual dissipation due to trapped magnetic flux in a dirty superconductor. Using simple estimates, approximate analytical calculations, and numerical simulations, we make predictions and comparisons with experiments performed in CERN and Cornell on resonant superconducting radio-frequency NbCu, doped-Nb and Nb3Sn cavities. We invoke hysteretic losses originating in a rugged pinning potential landscape to explain the linear behavior of the sensitivity of the residual resistance to trapped magnetic flux as a function of the amplitude of the radio-frequency field. Our calculations also predict and describe the crossover from hysteretic-dominated to viscous-dominated regimes of dissipation. We propose simple formulas describing power losses and crossover behavior, which can be used to guide the tuning of material parameters to optimize cavity performance.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1483458
Alternate Identifier(s):
OSTI ID: 1611051
Grant/Contract Number:  
SC0008431
Resource Type:
Published Article
Journal Name:
Physical Review Applied
Additional Journal Information:
Journal Name: Physical Review Applied Journal Volume: 10 Journal Issue: 5; Journal ID: ISSN 2331-7019
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Physics; Dissipative dynamics; Flux pinning; Superconducting RF; Vortices in superconductors; Accelerator subsystems; Cavity resonators

Citation Formats

Liarte, Danilo B., Hall, Daniel, Koufalis, Peter N., Miyazaki, Akira, Senanian, Alen, Liepe, Matthias, and Sethna, James P. Vortex Dynamics and Losses Due to Pinning: Dissipation from Trapped Magnetic Flux in Resonant Superconducting Radio-Frequency Cavities. United States: N. p., 2018. Web. doi:10.1103/PhysRevApplied.10.054057.
Liarte, Danilo B., Hall, Daniel, Koufalis, Peter N., Miyazaki, Akira, Senanian, Alen, Liepe, Matthias, & Sethna, James P. Vortex Dynamics and Losses Due to Pinning: Dissipation from Trapped Magnetic Flux in Resonant Superconducting Radio-Frequency Cavities. United States. https://doi.org/10.1103/PhysRevApplied.10.054057
Liarte, Danilo B., Hall, Daniel, Koufalis, Peter N., Miyazaki, Akira, Senanian, Alen, Liepe, Matthias, and Sethna, James P. Tue . "Vortex Dynamics and Losses Due to Pinning: Dissipation from Trapped Magnetic Flux in Resonant Superconducting Radio-Frequency Cavities". United States. https://doi.org/10.1103/PhysRevApplied.10.054057.
@article{osti_1483458,
title = {Vortex Dynamics and Losses Due to Pinning: Dissipation from Trapped Magnetic Flux in Resonant Superconducting Radio-Frequency Cavities},
author = {Liarte, Danilo B. and Hall, Daniel and Koufalis, Peter N. and Miyazaki, Akira and Senanian, Alen and Liepe, Matthias and Sethna, James P.},
abstractNote = {We use a model of vortex dynamics and collective weak-pinning theory to study the residual dissipation due to trapped magnetic flux in a dirty superconductor. Using simple estimates, approximate analytical calculations, and numerical simulations, we make predictions and comparisons with experiments performed in CERN and Cornell on resonant superconducting radio-frequency NbCu, doped-Nb and Nb3Sn cavities. We invoke hysteretic losses originating in a rugged pinning potential landscape to explain the linear behavior of the sensitivity of the residual resistance to trapped magnetic flux as a function of the amplitude of the radio-frequency field. Our calculations also predict and describe the crossover from hysteretic-dominated to viscous-dominated regimes of dissipation. We propose simple formulas describing power losses and crossover behavior, which can be used to guide the tuning of material parameters to optimize cavity performance.},
doi = {10.1103/PhysRevApplied.10.054057},
journal = {Physical Review Applied},
number = 5,
volume = 10,
place = {United States},
year = {Tue Nov 27 00:00:00 EST 2018},
month = {Tue Nov 27 00:00:00 EST 2018}
}

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Cited by: 19 works
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