Speaker
Description
High gradient radio frequency (rf) driven photoguns are photoemission electron sources that have important applications for accelerator-based instruments, such as light sources and electron microscopy. Numerous efforts have been made to push for even higher field gradient while suppressing rf breakdowns. We propose the Compressed Ultrashort Pulse Injector Demonstrator (CUPID), a 1.6 cell photogun driven by nanosecond high power rf pulses to achieve high gradients with low breakdown rate. This photogun is powered by ultrashort pulses from a rf pulse compressor and a high power klystron. This presentation focuses on the work of applying the CUPID photogun for the generation of x-ray free-electron laser at 40 keV photon energy or higher. We first present the design of CUPID photogun and designed performance to achieve very high field gradient, followed by beam dynamics studies of a photoinjector formed by CUPID photogun and other beamline components. Start-to-end simulation results with the existing LCLS copper accelerator are shown to demonstrate CUPID as a viable upgrade pathway for higher x-ray photon energies.
| Working group | WG4 |
|---|