Speaker
Description
Superconducting radio-frequency (SRF) cavities represent a key technology for modern particle accelerators. In high-current energy recovery linac (ERL) facilities, suppressing higher-order modes (HOMs) is critical to ensure beam stability and minimize additional cryogenic heat loads. This work introduces a waveguide-based scheme to extract and damp harmful HOMs excited by intense beams. A systematic RF design and optimization procedure for this waveguide damping method is presented. By implementing the damping scheme into a single-cell cavity geometry, consistent HOM suppression is achieved while maintaining good properties for the fundamental accelerating mode. The final single-cell cavity adopts a TESLA-type geometry with enlarged beam pipes, and is now prepared for surface processing and vertical RF tests at cryogenic conditions.
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