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大晶粒铌材是射频超导领域的研究热点之一.采用大晶粒铌材的射频超导谐振腔,其后处理工艺可以大大简化.北京大学对此进行了深入细致的研究,自主研制了采用国产大晶粒铌材的射频超导腔,对这些超导腔进行了简单的表面处理,包括标准的化学抛光(BCP)和120℃低温烘烤处理,未进行非常复杂的电抛光处理,低温性能测试结果表明其低温超导性能优越,大晶粒1.3GHz超导腔的加速梯度达到了43.5MV/m,为我国超导加速器的国产化打下了基础.
Large grain niobium material is one of the research hotspots in the field of RF superconducting.Using the RF superconducting resonator with large grain niobium material, the post-treatment process can be greatly simplified.Peking University conducted in-depth and meticulous research, self-developed The use of domestic large-grained niobium RF superconducting cavity, the superconducting cavity was a simple surface treatment, including standard chemical polishing (BCP) and 120 ℃ low temperature baking process, without the very complex electropolishing process , The result of low temperature performance test shows that its low temperature superconductivity is superior, the acceleration gradient of large grain 1.3GHz superconducting cavity reaches 43.5MV / m, which lays the foundation for the localization of superconducting accelerator in our country.