12th International Workshop on Thin Films and New Ideas for Pushing the Limits of RF Superconductivity

Split cavity progress at Daresbury Laboratory

24 Sept 2026, 15:30

30m

Prince of Wales Suite (Crowne Plaza Chester, Chester, United Kingdom)

Emerging Frontlines in Characterization Methods: Advanced Imaging & Novel Probes Emerging Frontlines in Characterizion methods: Advanced Imaging & Novel Probes

Speaker

Daniel Turner (-)

Description

To investigate new and novel materials, two split cavities have been designed and built at Daresbury laboratory,
operating at 1.3 GHz and 6 GHz. Both cavities are split in half longitudinally to ensure no electrical contact
resistance. Split cavities are beneficial to be used as research cavities as they allow inspection of the radio-frequency
surface at all stages of coating, and after testing. Furthermore, a split cavity is not constrained to depositions using
a cylindrical target, and allow planar targets to also be used. This is beneficial for materials such as Nb3Sn, where
cylindrical targets do not exist.
The design of both split cavities will be presented. Initial results on the 6 GHz cavity will be shown for niobium,
and for thick (micrometers) film of Nb3Sn with a niobium buffer layer, and also a multilayer cavity consisting of a
niobium substrate and a Nb3Sn and thin (nanometer) film on the surface.
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