Optical Klystron Enhancement to Self Ampliﬁed Spontaneous Emission at FERMI
AbstractThe optical klystron enhancement to a self-ampliﬁed spontaneous emission free electron laser has been studied in theory and in simulations and has been experimentally demonstrated on a single-pass high-gain free electron laser, the FERMI FEL-1, in 2014. The main concept consists of two undulators separated by a dispersive section that converts the energy modulation induced in the ﬁrst undulator in density modulation, enhancing the coherent harmonic generation in the ﬁrst part of the second undulator. This scheme could be replicated in a multi-stage: the bunching is enhanced after each dispersive section, consistently reducing the saturation length. We have applied the multi-stage optical klystron (OK) scheme on the FEL-2 line at FERMI, whose layout includes three dispersive sections. Optimizing the strength of the dispersions allowed a signiﬁcant increase of the self-ampliﬁed spontaneous emission (SASE) intensity in comparison to a single-stage OK and extending to the soft-X rays the OK enhanced SASE previously demonstrated on FEL-1. View Full-Text
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Penco, G.; Allaria, E.; De Ninno, G.; Ferrari, E.; Giannessi, L.; Roussel, E.; Spampinati, S. Optical Klystron Enhancement to Self Ampliﬁed Spontaneous Emission at FERMI. Photonics 2017, 4, 15.
Penco G, Allaria E, De Ninno G, Ferrari E, Giannessi L, Roussel E, Spampinati S. Optical Klystron Enhancement to Self Ampliﬁed Spontaneous Emission at FERMI. Photonics. 2017; 4(1):15.Chicago/Turabian Style
Penco, Giuseppe; Allaria, Enrico; De Ninno, Giovanni; Ferrari, Eugenio; Giannessi, Luca; Roussel, Eléonore; Spampinati, Simone. 2017. "Optical Klystron Enhancement to Self Ampliﬁed Spontaneous Emission at FERMI." Photonics 4, no. 1: 15.