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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 Hillert21Deutsches 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.

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