FEL2022

Evolution of Microbunching in Drift Sections

MOP01

22 Aug 2022, 16:00

1h 30m

Exhibition Hall (Trieste Convention Centre)

Contributed Poster FEL Theory Monday posters

Speakers

Shaukat Khan (TU Dortmund University) Alexander Brynes (Elettra-Sincrotrone Trieste S.C.p.A.) Carlo Spezzani (Elettra-Sincrotrone Trieste S.C.p.A.) Enrico Allaria (Elettra-Sincrotrone Trieste S.C.p.A.) Eugenio Ferrari (Deutsches Elektronen-Synchrotron) Evgeny Schneidmiller (Deutsches Elektronen-Synchrotron) Giuseppe Penco (Elettra-Sincrotrone Trieste S.C.p.A.) Luca Giannessi (Elettra Sincrotrone Trieste and Istituto Nazionale di Fisica Nucleare) Primoz Rebernik Ribic (Elettra-Sincrotrone Trieste S.C.p.A.) Simone Spampinati (Elettra-Sincrotrone Trieste S.C.p.A.) Filippo Sottocorona (Elettra-Sincrotrone Trieste S.C.p.A. and University of Trieste) Giovanni Perosa (Elettra-Sincrotrone Trieste S.C.p.A. and University of Trieste) Mauro Trovo (Elettra-Sincrotrone Trieste S.C.p.A.) Giovanni De Ninno (Elettra-Sincrotrone Trieste S.C.p.A. and University of Nova Gorica)

Description

The typical layout adopted in a seeded harmonic generation free-electron laser is based on radiator undulators placed immediately after the dispersive section, where the bunching is created.
With the advent of new and more complex seeding schemes, this solution cannot always be implemented and cases, where the bunched beam needs to be propagated in free space before entering the radiator, should be investigated.
The evolution of the density modulation in a drift may also plays a role on long intra-undulator sections in short wavelength FELs.
We report here on recent studies aimed at investigating the impact of bunching evolution in a drift space on coherent harmonic emission. Experimental results collected at the FERMI free-electron laser are compared with theoretical and numerical predictions.

Proceedings

Paper

MOP01.pdf