Göttingen 2025 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 7: Novel Accelerator Concepts II and FELs

AKBP 7.6: Vortrag

Mittwoch, 2. April 2025, 17:30–17:45, ZHG004

Status of THz FEL activities at PITZ — •Namra Aftab, Xiangkun Li, and Mikhail Krasilnikov — Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany

A single-pass THz free-electron laser (FEL) at the Photo Injector Test facility at DESY in Zeuthen (PITZ) was designed and implemented for a proof-of-principle experiment on a tunable high-power THz source for pump-probe experiments at the European XFEL. THz pulses are generated at a radiation wavelength of 100 μm within a 3.5 m long, strongly focusing planar LCLS-I undulator. High gain is achieved by driving the FEL with high brightness beams from the PITZ photoinjector at 17 MeV and a bunch charge of up to several nC. Simulations have been carried out to understand the experimental results. THz diagnostics are focused in particular in order to accurately characterize the radiation pulse energy, spectrum and temporal profile.

Keywords: THz; photoinjector; diagnostics; PITZ; FEL