| Article | |
| Report number | arXiv:1808.01293 |
| Title | Vortex dynamics and losses due to pinning: Dissipation from trapped magnetic flux in resonant superconducting radio-frequency cavities |
| Author(s) | Liarte, Danilo B. (Cornell U., LASSP) ; Hall, Daniel (Cornell U.) ; Koufalis, Peter N. (Cornell U.) ; Miyazaki, Akira (CERN ; U. Manchester (main)) ; Senanian, Alen (Cornell U., LASSP) ; Liepe, Matthias (Cornell U.) ; Sethna, James P. (Cornell U., LASSP) |
| Publication | 2018-11-28 |
| Imprint | 2018-08-03 |
| Number of pages | 15 |
| Note | 15 pages, 8 figures |
| In: | Phys. Rev. Applied 10 (2018) 054057 |
| DOI | 10.1103/PhysRevApplied.10.054057 (publication) |
| Subject category | physics.acc-ph ; Accelerators and Storage Rings ; cond-mat.supr-con |
| 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 Nb$_3$Sn 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. |
| Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2018-2024 authors (License: CC-BY-4.0) |
Corresponding record in: Inspire
Δημιουργία εγγραφής 2019-03-19, τελευταία τροποποίηση 2022-08-10
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