Dedicated Assembly infrastructure for the first assembly / dis-assembly and repair of superconducting accelerator modules
While the string of accelerating cavities is assembled in ISO4 clean rooms, the further assembly of the closed vacuum system to the so-called cold mass which is the inner structure of the cryostat is done in dedicated assembly areas. DESY has developed the respective infrastructure and uses it for standard European XFEL or FLASH modules.
The outside clean room assembly work includes installation of
frequency tuners, magnetic shields and others. Finally the cold-mass is moved
in to the outer vacuum vessel. The picture shows the almost finished European
XFEL 3.9 GHz module after assembly in the DESY infrastructure.