Speaker
Description
The Photo Injector Test Facility at DESY in Zeuthen (PITZ) is developing a THz free electron laser (FEL) as a potential source for pump–probe experiments at the European XFEL. In a recent proof-of-principle experiment using the LCLS-I undulator and a 17 MeV/c electron beam from the PITZ injector, pulse energies exceeding 100 μJ at 3 THz were demonstrated for bunch charges up to 2.4 nC. These results confirmed the feasibility of the PITZ-based THz FEL concept; however, the achievable performance was limited by the multipurpose nature of the existing PITZ facility, which is not optimized for THz generation.
A dedicated THz FEL facility driven by a PITZ-like injector is studied by means of numerical simulations. In comparison with the existing PITZ beamline, the proposed machine is designed with beam energies of up to 45 MeV, a tunable bunch compressor, and two APPLE-II undulators covering superradiant operation in the 0.1–1 THz range and SASE operation in the 1–30 THz range. Based on GENESIS 1.3 and start-to-end simulations, pulse energies of approximately 800 μJ at 10 THz in SASE mode for 1 nC bunches and about 35 μJ at 1 THz in superradiant mode for 200 pC bunches with 1.5 ps rms length are expected. In addition, further studies on seeding techniques and facility optimization are currently being carried out.
| I have read and accept the Privacy Policy Statement | Yes |
|---|