Free-electron-lasers fill a critical gap in the space of THz-sources as they can reach high
average and peak powers with spectral tunability. Using a waveguide in a THz FEL …

Research and development of an accelerator-based THz source prototype for pump-probe
experiments at the European XFEL are ongoing at the Photo Injector Test Facility at DESY in …

Using a waveguide in a THz FEL has been shown to maximize the coupling and enable
efficient extraction of relativistic electron beam energy from a single passage through a …

We present theoretical analysis and design considerations of a THz superradiant FEL. We
derive analytical expressions for the spectral parameter of THz radiation, emitted …

In free-electron laser injectors the so-called microbunching instability can severely degrade
the beam quality of electron bunches and therefore negatively impact the performance of the …

High-intensity and widely tunable sources in the terahertz (THz) frequency range are highly
desirable for both fundamental and applied researches. Free electron lasers (FELs) …

A single-pass THz free-electron laser (FEL) at the Photo Injector Test facility at DESY in
Zeuthen (PITZ) was designed and realized for proof-of-principle experiments on a tunable …

The first operational high peak and average power THz self-amplified spontaneous
emission (SASE) free electron laser (FEL) at the Photo Injector Test facility at DESY in …