Bernd Steffen – Laser-based longitudinal diagnostics of femtosecond electron bunches at free electron lasers

Bernd Steffen – Laser-based longitudinal diagnostics of femtosecond electron bunches at free electron lasers

Dr. Bernd Steffen, Deutsches Elektronen-Synchrotron DESY, Hamburg

Leuchs-Russell-Auditorium, A.1.500, Staudtstr. 2
Location Details

Abstract
SASE-FELs (Self-Amplified Spontaneous Emission Free-Electron-Lasers) are able to produce fs laser-like radiation pulses ranging from 100nm to 0.5nm with mJ pulse energy. The ‘gain-media’ this process are high-energy electron bunches with a high charge density in magnetic undulators. To achieve and stabilise these short electron bunches, a number of different devices to measure the longitudinal properties of the bunches are installed along the accelerator. This talk will present some of the used devices with a focus on the ones using electro-optical techniques to sample the electron bunch field with fs lasers and the laser-based synchronisation system and the laser synchronisation needed to run them at the European XFEL accelerator.