Tuning microwave losses in superconducting resonators

A Gurevich - Superconductor Science and Technology, 2023 - iopscience.iop.org
The performance of superconducting resonators, particularly cavities for particle
accelerators and micro cavities and thin film resonators for quantum computations and …

Challenges and opportunities of srf theory for next generation particle accelerators

A Gurevich, T Kubo, JA Sauls - arXiv preprint arXiv:2203.08315, 2022 - arxiv.org
We suggest a program to establish theoretical performance limits of srf cavities using
modern theories of nonequilibrium superconductivity under a strong electromagnetic field …

Influence of furnace baking on Q–E behavior of superconducting accelerating cavities

H Ito, H Araki, K Takahashi… - Progress of Theoretical …, 2021 - academic.oup.com
The performance of superconducting radio-frequency (SRF) cavities depends on the
condition of the niobium surface. Recently, various heat treatment methods have been …

Challenges and transformative opportunities in superconductor vortex physics

S Eley, A Glatz, R Willa - Journal of Applied Physics, 2021 - pubs.aip.org
In superconductors, the motion of vortices introduces unwanted dissipation that is disruptive
to applications. Fortunately, material defects can immobilize vortices, acting as vortex …

Enhanced Surface Superconductivity of Niobium by Zirconium Doping

NS Sitaraman, Z Sun, BL Francis, AC Hire, T Oseroff… - Physical Review …, 2023 - APS
Superconducting radio-frequency (SRF) cavities currently rely on niobium (Nb), and could
benefit from a higher-T c surface, which would enable a higher operating temperature, lower …

Critical current throughout the BCS-BEC crossover with the inclusion of pairing fluctuations

L Pisani, V Piselli, GC Strinati - Physical Review A, 2024 - APS
The present work aims at providing a systematic analysis of the current density versus
momentum characteristics for a fermionic superfluid throughout the BCS-BEC crossover …

Effects of nonmagnetic impurities and subgap states on the kinetic inductance, complex conductivity, quality factor, and depairing current density

T Kubo - Physical Review Applied, 2022 - APS
We investigate how a combination of a nonmagnetic impurity scattering rate γ and finite
subgap states parametrized by Dynes Γ affects various physical quantities relevant to …

[HTML][HTML] Q-factor optimization for high-beta 650 MHz cavities for PIP-II

M Martinello, DJ Bice, C Boffo… - Journal of Applied …, 2021 - pubs.aip.org
High Q-factors are of utmost importance to minimize losses of superconducting radio-
frequency cavities deployed in continuous wave particle accelerators. This study elucidates …

Thermalization and dynamics of high-energy quasiparticles in a superconducting nanowire

T Jalabert, EFC Driessen, F Gustavo, JL Thomassin… - Nature Physics, 2023 - nature.com
The relaxation of energetic quasiparticles in superconducting nanostructures involves many
cascaded interactions between electrons, phonons and Cooper pairs. These dynamics are …

Superheating fields of semi-infinite superconductors and layered superconductors in the diffusive limit: structural optimization based on the microscopic theory

T Kubo - Superconductor Science and Technology, 2021 - iopscience.iop.org
The superheating field Hsh of the Meissner state is thought to determine the theoretical field-
limit of superconducting accelerator cavities. We investigate Hsh of semi-infinite …