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Title: Vertical Testing of Eco-Friendly Bipolar Electromechanical Bulk Processing of SRF Cavities

Technical Report ·
DOI:https://doi.org/10.2172/1568835· OSTI ID:1568835
 [1]
  1. Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Fermilab will provide a single-cell 1.3 GHz RF cavity and niobium coupons for Faraday Technology to use to develop the bulk bi-polar electropolishing process. The RF cavity will remain Fermilab property. Phase I will first demonstrate the feasibility of the process on coupons to optimize Bipolar EP process parameters to achieve niobium removal rates that are compatible with bulk processing throughput rates, while maintaining desired surface finishes. Subsequently in Phase I, we will transition the Bipolar EP process from coupons to bulk processing of single-cell cavities, while maintaining the desired removal rates. The project team will determine the performance effect of the Bipolar EP Bulk Process via cavity testing, and develop a preliminary economic analysis showing the commercial viability of the technology as compared to conventional practice. Under this CRADA, Fermilab provided a 1.3 GHz RF cavity to Faraday Technology to use for acid-free electropolishing studies. The original scope of work provided for up to two tests of the electropolished cavity in Fermilab’s Vertical Test Stand (VTS).

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Faraday Technology, Inc., Clayton, OH (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
DOE Contract Number:
AC02-07CH11359
OSTI ID:
1568835
Report Number(s):
FERMILAB-CRADA-FRA-2014-0012; oai:inspirehep.net:1756985
Country of Publication:
United States
Language:
English

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