Dortmund 2021 – scientific programme

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 10: Synchrotron Radiation and FELs

AKBP 10.9: Talk

Thursday, March 18, 2021, 16:00–16:15, AKBPa

Divergence Study of an Echo-Enabled Harmonic Generation Free-Electron Laser — •Fabian Pannek¹, Sven Ackermann², Enrico Allaria², Pardis Niknejadi², Georgia Paraskaki², Lucas Schaper², and Wolfgang Hillert¹ — ¹Universität Hamburg, Hamburg, Deutschland — ²Deutsches Elektronen-Synchrotron (DESY), Hamburg, Deutschland

At FLASH, the Free-Electron LASer in Hamburg, an upgrade of one of the existing beamlines towards echo-enabled harmonic generation (EEHG) is planned. With this upgrade, FLASH will be the first seeded FEL facility that provides high repetition rate radiation in the XUV and soft X-ray regime. A critical quantity characterizing the radiation is its divergence, which is crucial for the design of photon diagnostics and the transport of the radiation to the experiment. To investigate the impact of the electron beam and beamline parameters on the divergence, dedicated numerical simulations based on the FEL code GENESIS 1.3 version 4 have been carried out. We will present and discuss the first results of these studies.