Speaker
Dr
Luca Giannesi
Description
The injection of a seed to initiate the FEL amplification in a free electron laser is a concept initially introduced to improve the source spectral brightness. This concept was first demonstrated at BNL (USA). A few experiments carried out later have shown the possibility to extend the method to reach VUV wavelengths and FERMI was built as a facility exploiting these methods to provide to users coherent light down to the soft X-ray range of the spectrum from a seeded FEL.
After about thirteen years of operation of FERMI, a number of other possibilities which go beyond the simple control of the spectral quality of the emitted pulses have been exploited. The seed has indeed offered the possibility of controlling synchronization, pulse duration and phase, to generate multiple pulses for the implementation of multiple color schemes and coherent control experiments.
An overview of FERMI will be provided.
