Speaker
Description
The Photo Injector Test facility at DESY in Zeuthen (PITZ) develops a prototype tunable high-power THz source for pump-probe experiments at the European XFEL. A single-pass high gain THz free-electron laser (FEL) was realized at PITZ. A THz beam line based on a strongly focusing planar LCLS-I undulator is used for proof-of-principle experiments. The first lasing at the center frequency of ~3 THz demonstrated high gain with radiation pulse energies exceeding 100 microjoules. Electron beams with bunch charge of 2-3 nC and mean beam momentum of ~17 MeV/c were used to generate high-energy THz pulses. Recently, a narrow-band spectrum has been measured using a Fourier Transform Infra-red (FTIR) spectrometer based on a reflective lamellar grating. The experimental results, including the gain curves as well as spectral properties along them, are presented.
Funding Agency
This work was supported by the European XFEL research and development program.
