In this study we will show a new method of polishing for Nb₃Sn cavities known as centrifugal barrel polishing (CBP). Using this method, Nb₃Sn coated samples are polished to a surface roughness comparable to a traditional Nb cavity after electropolishing. We also investigate different methods of cleaning the Nb₃Sn surface after CBP to remove residual abrasive particles. The polished Nb₃Sn surface is analyzed using confocal laser microscopy, and scanning electron microscopy is used to image the surface and measure the surface roughness after polishing. Transmission electron microscopy is also used for high resolution analysis of the surface after polishing. Finally, we show that CBP can improve the performance of a Nb₃Sn superconducting radiofrequency cavity.

中文翻译：

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使用离心滚筒抛光提高 Nb3Sn 型腔性能

_{在本研究中，我们将展示一种新的 Nb 3} Sn 腔体抛光方法，称为离心滚筒抛光 (CBP)。使用这种方法，Nb ₃ Sn涂层样品在电解抛光后被抛光至与传统Nb腔体相当的表面粗糙度。我们还研究了 CBP 后清洁 Nb ₃ Sn 表面的不同方法，以去除残留的磨料颗粒。使用共焦激光显微镜分析抛光的Nb _{3 Sn表面，并使用扫描电子显微镜对表面进行成像并测量抛光后的表面粗糙度。}透射电子显微镜也可用于抛光后表面的高分辨率分析。_{最后，我们证明CBP可以提高Nb 3} Sn超导射频腔的性能。