Latest Development of Electropolishing Optimization for 650 MHz Cavity

Conference · Mon Sep 25 00:00:00 EDT 2023 · JACoW

DOI:https://doi.org/10.18429/JACoW-SRF2023-TUPTB042· OSTI ID:2283712

Chouhan, Vijay ^[1]; Bice, Damon ^[1]; Burk, David ^[1]; Chandrasekaran, Saravan Kumar ^[1]; Cravatta, Andrew  ^[1]; Dubiel, Paul ^[1]; Eremeev, Grigory  ^[1]; Furuta, Fumio ^[1]; Melnychuk, Oleksandr  ^[1]; Netepenko, Alexandr ^[1]; Ng, Man-Kwan ^[1]; Ozelis, Joseph  ^[1]; Park, HyeKyoung ^[1]; Ring, Tim ^[1]; Wu, Genfa  ^[1]; Guilfoyle, Berardino ^[2]; Kelly, Michael ^[2]; Reid, Thomas ^[2]

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1. Fermilab
2. Argonne

Electropolishing (EP) of 1.3 GHz niobium (Nb) superconducting RF cavities is conducted to achieve a desired smooth and contaminant-free surface that yields good RF performance. Achieving a smooth surface of a large-sized elliptical cavity with the standard EP conditions was found to be challenging. This work aimed to conduct a systematic parametric EP study to understand the effects of various EP parameters on the surface of 650 MHz cavities used in PIP-II linac. Parameters optimized in this study provided a smooth surface of the cavities. The electropolished cavities met the baseline requirement of field gradient and qualified for further surface treatment to improve the cavity quality factor.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 2283712
• Report Number(s): FERMILAB-CONF-23-274-TD; arXiv:2401.15157; oai:inspirehep.net:2723403
• Journal Information: JACoW, Vol. SRF2023
• Country of Publication: United States
• Language: English

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