Dortmund 2021 – scientific programme

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 1: Beam Dynamics

AKBP 1.8: Talk

Monday, March 15, 2021, 17:45–18:00, AKBPa

Electron beam studies from intensity modulated photocathode laser pulses for seeding a THz FEL — •Georgi Georgiev¹, Namra Aftab¹, Prach Boonpornprasert¹, Natthawut Chaisueb¹, James Good¹, Matthias Gross¹, Christian Koschitzki¹, Mikhail Krasilnikov¹, Xiangkun Li¹, Osip Lishilin¹, Anusorn Lueangaramwong¹, David Melkumyan¹, Sandeep Mohanty¹, Raffael Niemczyk¹, Anne Oppelt¹, Houjun Qian¹, Hamed Shaker¹, Guan Shu¹, Frank Stephan¹, Grygorii Vashchenko¹, Tobias Weilbach¹, and Wolfgang Hillert² — ¹Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany — ²University of Hamburg, 22761 Hamburg, Germany

A THz source is foreseen at the European XFEL for pump and probe experiments. As part of the efforts, a proof-of-principle experiment for an intense FEL-based THz source is under development at the Photo Injector Test Facility at DESY in Zeuthen (PITZ). Different FEL seeding schemes are considered, including temporal photocathode laser pulse modulation. A sub-THz modulated pulse is generated by introducing a Lyot filter into the laser system. The laser pulse is then converted into an electron bunch at the photocathode, which is transported downstream the accelerator until the location of a station for coherent transition radiation. Beam dynamics simulations and experimental results are presented.