Direct evidence of microstructure dependence of magnetic flux trapping in niobium.

ABSTRACT: Elemental type-II superconducting niobium is the material of choice for superconducting radiofrequency cavities used in modern particle accelerators, light sources, detectors, sensors, and quantum computing architecture. An essential challenge to increasing energy efficiency in rf applications is the power dissipation due to residual magnetic field that is trapped during the cool down process due to incomplete magnetic field expulsion. New SRF cavity processing recipes that use surface doping techniques have significantly increased their cryogenic efficiency. However, the performance of SRF Nb accelerators still shows vulnerability to a trapped magnetic field. In this manuscript, we report the observation of a direct link between flux trapping and incomplete flux expulsion with spatial var

SUBMITTER: Balachandran S 

PROVIDER: S-EPMC7940417 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature