Speaker
Description
We assess the thermal behavior of a cryogenically cooled copper photocathode integrated into a continuous-wave superconducting radio-frequency injector cavity through direct thermal contact. A coupled three-dimensional thermal-electromagnetic model incorporating both the bulk photocathode and the injector cavity is presented. For the current injector design, the laser heat load is predicted to have a negligible effect on the intrinsic quality factor of the cavity. The cryogenic stability of the copper cathode is identified as the primary operational constraint. To address the associated cooling challenges, we propose a modified cathode plug geometry.
Funding Agency
Work performed in the framework of R&D for future accelerator operation modes at the European XFEL and financed by the European XFEL GmbH
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