Beams Document 3332-v1

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Basic R&D for High gradient ILC SC cavity in KEK-STF

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Camille M. Ginsburg
Updated by:
Camille M. Ginsburg
Document Created:
11 Mar 2009, 15:39
Contents Revised:
11 Mar 2009, 15:39
Metadata Revised:
11 Mar 2009, 15:39
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New Electro-chemical Polishing facility (EP facility) in STF was commissioned in 2008 by the collaboration of FNAL cavity. Being connected to this commission, we started the basic R&D of EP treated niobium surface inside of the cavity. The purpose of the R&D is to aim high gradient, 35MV/m, the target of ILC. To get rid of try and error type R&D, we are seeking the method to understand what is going on the real cavity inside, such as optical inspection of heated region, application of surface analysis tools to understand what is the residuals after EP treatment. This is the introduction of our 1-year R&D effort, still in the beginning stage, such as; XPS, SEM, EDX analysis of EP treated Nb surface, sulfur removal experiment, optical inspection results, and tool developments like inspection camera, sponge-wipe mechanics, and local grinding mechanics.
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