We propose a new beam diagnostics method to reconstruct the phase space of charged
particle bunches in five dimensions, which consist of the horizontal and vertical positions …

The ARES linear accelerator at DESY aims to deliver stable and well-characterized electron
bunches with durations down to the sub-fs level. Such bunches are highly sought after to …

Undulator tapering controls the resonance properties of the free-electron laser (FEL)
amplification process. Wakefield energy losses in an undulator's vacuum chamber are one …

In this work we present the outlines of possible experiments for dielectric laser acceleration
(DLA) of ultra-short relativistic electron bunches produced by the ARES linac, currently …

Slice energy spread is one of the key parameters in free electron laser optimizations, but its
accurate measurement is not straightforward. Two recent studies from high energy (≥ 100 …

European XFEL is investing in the development of superconducting undulators (SCUs) for
future upgrade of its beamlines. SCUs made of NbTi, working at 2 K, with a period length of …

A new beam diagnostics method to reconstruct the full 5-dimensional phase space (𝑥, 𝑥′,
𝑦, 𝑦′, 𝑡) of bunches has recently been proposed. This method combines a …

We present measurements of slice energy spread at the injector section of the European X-
Ray Free Electron Laser for an electron bunch with charge of 250 pC. Two methods …

We consider the collective beam dynamics in the accelerator of the European X-ray Free
Electron Laser for electron bunches with charges of 250 and 500 pC. The dynamics has …

The high peak current of the electron beam was found to be the key parameter for the THz
SASE FEL at the Photo Injector Test facility at DESY in Zeuthen (PITZ). A multipurpose …