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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 10: Synchrotron Radiation and FELs

AKBP 10.3: Vortrag

Donnerstag, 18. März 2021, 14:30–14:45, AKBPa

Current status of the electro-optical electron bunch measurement setup at the DELTA short-pulse source — •Ihsan Mohammad, Shaukat Khan, and Carsten Mai — Center for Synchrotron Radiation (DELTA), TU Dortmund University, Dortmund, Germany

At the 1.5-GeV electron storage ring DELTA operated by the TU Dortmund University, the interaction with femtosecond pulses from a Ti:sapphire laser system in an undulator modulates the electron energy within a slice of the electron bunch and gives rise to the coherent emission of ultrashort pulses in the VUV range. Along the storage ring lattice, the off-energy electrons leave a dip in the longitudinal electron distribution causing the coherent emission of (sub-)THz radiation.

The talk reviews recent results obtained in the study and manipulation of coherently emitted THz radiation and presents the status of an electro-optical (EO) setup to measure the laser-induced temporal structure within the electron bunch. Using the EO effect, the temporal profile of THz radiation is mapped onto the spectrum of a chirped laser pulse. This can be done either in the far field with THz radiation passing through an EO crystal or with a near-field setup inside the storage ring with the electron bunches passing close to the crystal.

This project is supported by the BMBF under contract 05K19PEC.