Speaker
Description
The Ferninfrarot Linac- und Test-Experiment (FLUTE) at the Karlsruhe Institute of Technology (KIT) is a compact linac test facility providing sub-picosecond to femtosecond short electron bunches with energies up to several tens of MeV. The transient electric near-field of such bunches is relevant for understanding coherent THz emission and for developing compact field-sensitive beam diagnostics. Here, we present first electro-optical measurements of bunch-induced near-field signals in the FLUTE in-air section using a photonic-integrated Mach-Zehnder-interferometer sensor placed close to the beam axis. The measured delay-dependent response shows features consistent with electro-optical detection of the transient electric near field of the bunch. Our results establish a basis for future spatially resolved measurements with varying accelerator parameters.
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