Conveners
Seeded FEL: Session-4
- Francesca Curbis (Lund University)
Sometimes free-electron laser beamlines cannot be built under the “infinite money approximation”. This also holds true for FLASH2020+. Here, owning to resource optimization, the amount of APPLE-III type radiators to be installed in the current 2024/25 shutdown has been reduced from 11 to 6+3 re-used planar undulators from the sFLASH/Xseed experiments. While adding undulators is possible in...
The conversion of the FERMI FEL-1 line to Echo Enabled Harmonic Generation (EEHG) has been successfully completed, and the new scheme is currently undergoing commissioning and testing for user operation. This achievement marks a significant milestone in the facility's upgrade process, aimed at extending the covered spectral range to include the entire water window and beyond. Thanks to this...
The soft X-ray FEL beamline ATHOS at SwissFEL has been upgraded for Echo-enabled Harmonic Generation (EEHG) to provide coherent signals up to 1 keV photon energies. This presentation reports on the current demonstration of the EEHG principle, its challenges to implement it at a beam energy of 3 GeV and the outlook on studies to further improve the electron beam quality, namely reducing the...
High-repetition-rate and fully coherent soft X-ray free-electron lasers (FELs) are crucial for time-resolved spectroscopic experiments. However, it is difficult to operate seeded FELs at a high repetition rate due to the limitations of present state-of-the-art laser systems. We have proposed and carried out a series of experimental studies on self-modulation based seeded FELs at the Shanghai...
