Multilayer coating for higher accelerating fields in superconducting radio-frequency cavities: a review of theoretical aspects

Abstract

Theory of the superconductor-insulator-superconductor (S-I-S) multilayer structure in superconducting accelerating cavity application is reviewed. The theoretical field limit, optimum layer thicknesses and material combination, and surface resistance are discussed. Those for the S-S bilayer structure are also reviewed.

38 pages, 21 figures

References in corpus (11)

• Dendritic magnetic instability in superconducting MgB2 films
• Dendritic flux avalanches and nonlocal electrodynamics in thin superconducting films
• Dendritic flux avalanches in superconducting Nb3Sn films
• Superheating field of superconductors within Ginzburg-Landau theory
• Vortex avalanches and magnetic flux fragmentation in superconductors
• Avalanche-driven fractal flux distributions in NbN superconducting films
• Temperature dependence of the superheating field for superconductors in the high-k London limit
• Effect of Impurities on the Superheating field of Type II superconductors
• Radio-frequency electromagnetic field and vortex penetration in multilayered superconductors
• Strong Meissner screening change in superconducting radio frequency cavities due to mild baking
• Shielding superconductors with thin films

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• The Effect of Inhomogeneous Surface Disorder on the Superheating Field of Superconducting RF Cavities
• Effects of nonmagnetic impurities and subgap states on the kinetic inductance, complex conductivity, quality factor and depairing current density
• Tuning microwave losses in superconducting resonators
• Field of first flux entry and pinning strength of superconductors for RF application measured with muon spin rotation
• Dissipative conductivity of a dirty superconductor with Dynes subgap states under a dc bias current up to the depairing current density
• Depth-resolved measurements of the Meissner screening profile in surface-treated Nb
• Effect of random pinning on nonlinear dynamics and dissipation of a vortex driven by a strong microwave current
• A New High Parallel-Field Spectrometer at TRIUMF's $\beta$-NMR Facility
• Impact of border defects on the magnetic flux penetration in superconducting films
• Evidence for current suppression in superconductor-superconductor bilayers
• Tuning critical field, critical current, and diode effect of narrow thin-film superconductors through engineering inhomogeneous Pearl length
• Microscopic Examination of SRF-quality Nb Films through Local Nonlinear Microwave Response
• Lower Critical Field Measurement System based on Third-Harmonic Method for Superconducting RF Materials
• Comment on "Strong Meissner screening change in superconducting radio frequency cavities due to mild baking" [Appl. Phys. Lett. 104, 072601 (2014)]
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• Depth-resolved measurement of the Meissner screening profile in a niobium thin film from spin-lattice relaxation of the implanted $\beta$-emitter ${}^8$Li
• How High a Field Can Be and Has Been Achieved in Superconducting Bulk Niobium Cavities Across Different RRR Values?
• Lower critical field measurement of NbN multilayer thin film superconductor at KEK
• Evaluation of the superconducting characteristics of multi-layer thin-film structures of NbN and SiO${}_2$ on pure Nb substrate
• Depth-resolved Characterization of Meissner Screening Breakdown in Surface Treated Niobium
• Higgs-mode-induced instability and kinetic inductance in strongly dc-biased dirty-limit superconductors
• Search for inhomogeneous Meissner screening in Nb induced by low-temperature surface treatments
• Superconducting surface trap chips for microwave-driven trapped ions
• Significant improvement of the lower critical field in Y doped Nb: potential replacement of basic material for the radio-frequency superconducting cavity
• Determining the absolute value of magnetic penetration depth in small-sized superconducting films
• Superconducting properties of thin film $\mathrm{N}{\mathrm{b}}_{1-\mathrm{x}}\mathrm{T}{\mathrm{i}}_{\mathrm{x}}\mathrm{N}$ studied via the NMR of implanted ${}^8$Li
• Electropolishing-Induced Topographic Defects in Niobium: Insights and Implications for Superconducting Radio Frequency Applications