WP1 – Project Management and Coordination

WP2 – Strategic Communication, Outreach and Sustainability

WP3 – Reinforcing Co-creation with Industry

WP4 – Superconducting Thin Films for RF Cavities

WP5 – Laser Driven Acceleration

WP6 – Advanced RF Technologies

WP7 – Permanent Magnets

WP8 – High-Temperature Superconducting Magnets

WP9 – High-Brightness Electron Injectors

WP10 – Surface Treatments for Niobium SRF Cavities

WP11 – Additive Manufacturing

WP12 – Advanced Materials for Accelerators

The objective of WP9 is to design, build, and test two RF key components for high brightness electron injectors: a chirping cavity and a transverse deflection structure (TDS). Following electromagnetic and mechanical design, the devices will undergo low-power and high-power RF testing for performance validation.

This work package includes two tasks.

Task 9.1: Chirping Cavity

This task develops a chirping cavity to increase the peak current of electron bunches through ballistic bunching directly after the RF gun. INFN-LNF will design an 8–10 cell travelling-wave S-band structure, optimised for beam dynamics along with physical constraints and RF power considerations. The cavity will be manufactured using INFN’s brazing-free clamped technology, with machining by COMEB, and assembly and low-power RF testing at INFN-LNF.

Task 9.2: Transverse Deflecting Structure and High-Power Validation of RF Devices

This task develops a multi-cell transverse deflecting structure (TDS) to measure the variation in the beam parameters over the length of the electron bunch. PSI will design and assemble the device using its tuning-free brazing technology, with precision machining of the components by VDL-ETG. After low-power RF testing at PSI, both the TDS and the chirping cavity will undergo high-power validation at PSI’s RF test facility to assess performance under realistic operating conditions.