Beams Document 4117-v1

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Superconducting RF cavities: extending knowledge boundaries

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Alexander Sukhanov
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Alexander Sukhanov
Document Created:
19 Apr 2012, 15:10
Contents Revised:
19 Apr 2012, 15:10
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19 Apr 2012, 15:10
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Superconducting radio frequency (SRF) cavities made of bulk niobium are currently used for particle acceleration in existing facilities such as SNS, CEBAF and CESR, and are a technology of choice for future machines such as Project X, XFEL, FRIB, NGLS, and ILC. Performance of such macrostructures as SRF cavities is almost entirely determined by a thin layer on the inner surface of about 40 nanometers thick. While the technology has matured to the point of reliably producing the quality factors of > 10^10 and larger than 35 MV/m accelerating gradients, the inner workings of most of the implemented "recipes" applied on the cavities (such as buffered chemical polishing, electropolishing, 120C baking, hydrofluoric acid rinsing) to achieve those remain unclear. Therefore the ways to improve cavity performance are not apparent. In this talk I will review my research targeted on filling this gap in knowledge as well as practical technological advantages coming from it.
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  • pdf file (APT_Fermilab_Romanenko_March_2012.pdf, 3.6 MB)
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