title: Spectral-phase interferometry for direct electric-field reconstruction applied to seeded extreme-ultraviolet free-electron lasers.
abstract: We present a setup for complete characterization of femtosecond pulses generated by seeded free-electron lasers (FELs) in the extreme-ultraviolet spectral region. Two delayed and spectrally shifted replicas are produced and used for spectral phase interferometry for direct electric field reconstruction (SPIDER). We show that it can be achieved by a simple arrangement of the seed laser. Temporal shape and phase obtained in FEL simulations are well retrieved by SPIDER reconstructions, allowing to foresee the implementation of this diagnostics tool on existing and future sources. This will be a significant step towards an experimental investigation and control of FEL spectral phase.
authors.forename: Benoît
authors.initials: B
authors.lastname: Mahieu
authors.forename: David
authors.initials: D
authors.lastname: Gauthier
authors.forename: Giovanni
authors.initials: G
authors.lastname: De Ninno
authors.forename: Hugo
authors.initials: H
authors.lastname: Dacasa
authors.forename: Magali
authors.initials: M
authors.lastname: Lozano
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Rousseau
authors.forename: Philippe
authors.initials: P
authors.lastname: Zeitoun
authors.forename: David
authors.initials: D
authors.lastname: Garzella
authors.forename: Hamed
authors.initials: H
authors.lastname: Merdji