SGER: To Manufacture Superconducting Accelerator Cavities by Electron-Beam Assisted Physical Vapor Deposition

高能加速器应用中的SRF腔的生产成本非常高，每米44，000美元，然而，这些腔的操作成本降低，需要研究以新的和有效的方式生产这些腔的方法。该SGER旨在考虑通过电子束辅助PVD在钼结构上沉积织构化铌膜。PVD的改进增加了可用于生产更高质量一致性薄膜的附加工艺驱动器。 这是一个高潜力的建议，考虑到应用，将获得的优势，如果这些SRF腔可以大量生产和较低的成本。高风险与生产相对无缺陷的Nb膜的不确定性有关，其中表面缺陷和晶界将是极其有害的。这项探索性研究将测试在发霉的基底上制造这些薄膜的可行性，探索与高性能薄膜相关的加工问题。如果这一原理的证明能够成立，那么将需要进一步的研究来确定高质量薄膜生产的优化条件。 PI将包括通过雷乌斯参与该计划的本科研究助理。宾夕法尼亚州立大学的子项目将提供必要的材料表征能力，合作将使学生有机会在任何一个校园参观/进行研究

SRF cavities in high energy accelerator application are very costly to produce, at $44,000 per meter, however the reduced operating costs with these cavities creates the need to investigate means of producing these cavities in new and efficient fashion. This SGER aims to consider the deposition of textured niobium films on molybdenum structures by electron beam assisted PVD. The modification of the PVD adds addition process driver that can be used to produce higher quality conforming thin films. This is a high potential proposal considering the applications, and the advantage that would be gained if these SRF cavities could be produces in quantity and lower cost. The high risk is related to the uncertainty of producing relatively defect-free Nb films, where surface defects and grain boundaries would be extremely deleterious. This exploratory research will test the feasibility of creating these films on the moldy substrates, exploring the processing issues related to high performance thin films. If this proof of principle can be established, then further research will be needed to determine optimization conditions for high quality film producibility. The PIs will include undergraduate research assistants on this program through REUs. A subaward to Penn State will provide the necessary materials characterization capability and the collaboration will give students a chance to visit / conduct research at either campus