Apr 22 – 26, 2024
Orto Botanico di Roma
Europe/Rome timezone

Using a passive dielectric structure to manipulate FEL beams

Not scheduled
Aranciera (Orto Botanico di Roma)


Orto Botanico di Roma

Botanical Garden of Rome Museum of Sapienza University of Rome Largo Cristina di Svezia 24 00165 Roma, RM


Evan Ericson (PSI/EPFL)


Plasma wakefield accelerators have the potential to reduce the size of particle accelerators because of the high accelerating gradients in plasma wakes. However, the finite length of bunches combined with the short wavelength of plasma wakes can give output beams with non-negligible energy spread that can negatively impact FEL performance. SwissFEL routinely operates a passive dielectric structure to perform beam manipulations that modify the FEL bandwidth and produce sub-femtosecond X-ray pulses. In this poster we present experimental observations and accompanying simulations that show the short-range wakefields in the SwissFEL passive dielectric structure can be used to modify the energy spread of the beam. We also show long-range wakefields produced in the passive structure can accelerate the SwissFEL beam.

Primary author

Evan Ericson (PSI/EPFL)


Presentation materials