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Understanding and optimization of the coating process of the radio-frequency Nb3Sn thin film superconducting cavities using tin vapor diffusion method
2024-01-15
Source PublicationAPPLIED SURFACE SCIENCE   Impact Factor & Quartile
ISSN0169-4332
EISSN1873-5584
Volume643
page numbers17
Abstract

A study was conducted to understand and optimize the coating process of Nb3Sn thin film superconducting radio-frequency (SRF) cavities using the tin (Sn) vapor diffusion method. The characterization of nanometer-scale Sn droplets, millimeter-scale Sn spots, and locally extremely thin patchy areas was carried out. The causes of their occurrence were analyzed, and their influence on RF performance was distinguished and clarified. Furthermore, a method of achieving high-quality Nb3Sn films was explored by increasing the adsorption of residual Sn vapor to suppress the generation of nanometer-scale Sn droplets while under the premise of ensuring uniform film growth by increasing the Sn vapor flux. It was seen that the performance of the 1.3 GHz single cell Nb3Sn SRF cavity coated at IMP was significantly enhanced after the optimization of the coating process with a maximum accelerating gradient (Eacc,max) of over 18 MV/m and an unloaded quality factor (Q0) of more than 1 x 1010 at Eacc = 12 MV/m and 4.2 K. This study provides quantitative insights for understanding the coating process and provides an essential reference for coating high-performance Nb3Sn SRF cavities using the Sn vapor diffusion method.

KeywordNb3sn Superconducting Radio-frequency Coating Process Vapor Diffusion Adsorption
PublisherELSEVIER
DOI10.1016/j.apsusc.2023.158708
Indexed BySCIE
Language英语
WOS Research AreaChemistry ; Materials Science ; Physics
WOS SubjectChemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:001093196400001
Original Document TypeArticle
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/568414
Collection兰州大学
Corresponding AuthorYang, Ziqin; He, Yuan
Affiliation
1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China;
2.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China;
3.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China;
4.Adv Energy Sci & Technol Guangdong Lab, Huizhou 516007, Peoples R China
Recommended Citation
GB/T 7714
Jiang, Guangze,Wu, Shuai,Yang, Ziqin,et al. Understanding and optimization of the coating process of the radio-frequency Nb3Sn thin film superconducting cavities using tin vapor diffusion method[J]. APPLIED SURFACE SCIENCE,2024,643.
APA Jiang, Guangze.,Wu, Shuai.,Yang, Ziqin.,He, Yuan.,Ye, Yang.,...&Zhan, Wenlong.(2024).Understanding and optimization of the coating process of the radio-frequency Nb3Sn thin film superconducting cavities using tin vapor diffusion method.APPLIED SURFACE SCIENCE,643.
MLA Jiang, Guangze,et al."Understanding and optimization of the coating process of the radio-frequency Nb3Sn thin film superconducting cavities using tin vapor diffusion method".APPLIED SURFACE SCIENCE 643(2024).
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