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Effect of cathode shape on vertical buffered electropolishing for niobium SRF cavities
Jin, S; Wu, AT; Lu, XY; Rimmer, RA; Lin, L; Zhao, K; Mammosser, J; Gao, J; Gao J(高杰)
2013
发表期刊APPLIED SURFACE SCIENCE
卷号280页码:93-103
摘要This paper reports the research results of the effect of cathode shape during vertical buffered electropolishing (BEP) by employing a demountable single cell niobium (Nb) superconducting radio frequency (SRF) cavity. Several different cathode shapes such as, for instance, bar, ball, ellipsoid, and wheels of different diameters have been tested. Detailed electropolishing parameters including I-V characteristic, removal rate, surface roughness, and polishing uniformity at different locations inside the demountable cavity are measured. Similar studies are also done on conventional electropolishing (EP) for comparison. It is revealed that cathode shape has dominant effects for BEP especially on the obtaining of a suitable polishing condition and a uniform polishing rate in an Nb SRF single cell cavity. EP appears to have the same tendency. This paper demonstrates that a more homogeneous polishing result can be obtained by optimizing the electric field distribution inside the cavity through the modification of the cathode shape given the conditions that temperature and electrolyte flow are kept constant. Electric field distribution and electrolyte flow patterns inside the cavity are simulated via Poisson-Superfish and Solidworks respectively. With the optimal cathode shape, BEP shows a much faster polishing rate of similar to 2.5 mu m/min and is able to produce a smoother surface finish in the treatments of single cell cavities in comparison with EP.
关键词Niobium SRF cavities Buffered electropolishing Electropolishing I-V characteristics
学科领域Chemistry; Materials Science; Physics
DOI10.1016/j.apsusc.2013.04.102
收录类别SCI
WOS记录号WOS:000321045700014
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被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/223835
专题加速器中心
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Jin, S,Wu, AT,Lu, XY,et al. Effect of cathode shape on vertical buffered electropolishing for niobium SRF cavities[J]. APPLIED SURFACE SCIENCE,2013,280:93-103.
APA Jin, S.,Wu, AT.,Lu, XY.,Rimmer, RA.,Lin, L.,...&高杰.(2013).Effect of cathode shape on vertical buffered electropolishing for niobium SRF cavities.APPLIED SURFACE SCIENCE,280,93-103.
MLA Jin, S,et al."Effect of cathode shape on vertical buffered electropolishing for niobium SRF cavities".APPLIED SURFACE SCIENCE 280(2013):93-103.
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