Recent Developments in Electropolishing and Tumbling R&D at Fermilab

Abstract
Fermi National Accelerator Lab (Fermilab) is continuing to improve its infrastructure for research and development on the processing of superconducting radio frequency cavities. A single cell 3.9 GHz electropolishing tool built at Fermilab and operated at an industrial partner was recently commissioned. The EP tool was used to produce a single cell 3.9 GHz cavity that reached an accelerating gradient of 30 MV/m with a quality factor of 5x109. A single cell 1.3 GHz cavity was also electropolished at the same industrial vendor using the vendor’s vertical full-immersion technique. On their first and only attempt the vendor produced a single cell 1.3 GHz cavity that reached 30 MV/m with a quality factor of 1x1010. These results will be detailed along with preliminary tumbling results.

Read the Entire Article at http://lss.fnal.gov/archive/2009/conf/fermilab-conf-09-539-ad-td.pdf

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