Centrifugal Barrel Polishing of a 650 MHz Single-Cell Nb Cavity

Abstract

This work reports the first application of centrifugal barrel polishing (CBP) to a 650 MHz single-cell niobium superconducting radio frequency cavity. The CBP was performed using a newly installed large tumbler designed to accommodate four large-sized 650 MHz multi-cell cavities. The CBP process was applied to smooth the internal surface of the cavity prior to electropolishing. This study describes the CBP procedure and presents surface results following the CBP process.