Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 11: Beschleunigerphysik I (SC, SC-Cavities)
HK 11.6: Vortrag
Montag, 4. März 2013, 12:30–12:45, WIL-C203
Centrifugal barrel polishing of 1.3 GHz Nb cavities — •Yegor Tamashevich1,2, Aliaksandr Navitski1, Lea Steder1, Eckhard Elsen1, and Brian Foster1,2 — 1DESY, 22607 Hamburg, Germany — 2University of Hamburg, 20146, Germany
Superconducting radio-frequency (SRF) cavities are the key components of particle accelerators such as the European X-ray Free Electron Laser (XFEL, under construction) and the planned future International Linear Collider (ILC). Steady progress in surface treatment techniques of SRF cavities in both the achievable quality factor Q and the accelerating electric field Eacc makes new accelerators and ambitious projects feasible. One of the alternative surface preparation techniques which is actually being explored is centrifugal barrel polishing (CBP) pioneered at KEK in Japan in mid-nineties by T. Hiuchi et al. CBP is a mechanical polishing of cavities and results in around 10x smaller surface roughness and mirror-like surface as compared to chemistry alone. Q and Eacc are expected to be at least as high as for chemically treated cavities. CBP eliminates the bulk chemistry and has the potential to completely replace the chemistry. The University of Hamburg is installing a CBP machine to study it as a cavity preparation and repair technique for 9-cell 1.3 GHz SRF cavities at the Deutsche Elektronen-Synchrotron (DESY). The setup and first commissioning tests will be presented and discussed.