Dedicated facilities for the preparation of superconducting cavities including 800°C and 1400°C baking, chemistry for surface treatment (BCP and electro-polishing), high pressure water rinsing, CO2 cleaning with dry ice, large ISO4 clean rooms
The surface treatment recipe used for the production of 800 superconducting European XFEL cavities was developed by DESY and its partners. Required infrastructure was prototyped in-house and later used to define standards for the industrial production. A large number of TESLA cavities were prepared by DESY since the mid 90-ies. Today emphasis is on smaller production series but also on special cavities like SRF guns, single-cell or cavities from research partners. Further optimized recipes are under study. Larger parts of the infrastructure are installed either next or even in the clean rooms used for the particle-free assembly of cavities to test stand inserts, or to complete cavity strings.
DESY, Hamburg (Germany)
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