Healing Gradient Degradation in Nb3Sn SRF Cavities Using a Recoating Method
arxiv(2024)
摘要
Despite having advantageous superconducting properties, Nb3Sn superconducting
radiofrequency (SRF) cavities still have practical challenges compared to Nb
SRF cavities due to the brittle nature of Nb3Sn. Performance degradation can
occur when a Nb3Sn SRF cavity experiences mechanical stresses such as during
handling and tuning of the cavity. In this study, we present a potential
treatment for SRF cavities that have experienced stress induced performance
degradation that involves a recoating procedure. The degraded cavity is coated
with a small amount of Sn using a single step vapor-diffusion methodology.
Using this approach we can recover a significant portion of the lost
performance of a Nb3Sn SRF cavity.
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