title: Undulator beamline optimization with integrated chicanes for X-ray free-electron-laser facilities.
abstract: An optimization of the undulator layout of X-ray free-electron-laser (FEL) facilities based on placing small chicanes between the undulator modules is presented. The installation of magnetic chicanes offers the following benefits with respect to state-of-the-art FEL facilities: reduction of the required undulator length to achieve FEL saturation, improvement of the longitudinal coherence of the FEL pulses, and the ability to produce shorter FEL pulses with higher power levels. Numerical simulations performed for the soft X-ray beamline of the SwissFEL facility show that optimizing the advantages of the layout requires shorter undulator modules than the standard ones. This proposal allows a very compact undulator beamline that produces fully coherent FEL pulses and it makes possible new kinds of experiments that require very short and high-power FEL pulses.
authors.affiliation: Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
authors.forename: Eduard
authors.initials: E
authors.lastname: Prat
authors.affiliation: Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
authors.forename: Marco
authors.initials: M
authors.lastname: Calvi
authors.affiliation: Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
authors.forename: Romain
authors.initials: R
authors.lastname: Ganter
authors.affiliation: Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
authors.forename: Sven
authors.initials: S
authors.lastname: Reiche
authors.affiliation: Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
authors.forename: Thomas
authors.initials: T
authors.lastname: Schietinger
authors.affiliation: Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
authors.forename: Thomas
authors.initials: T
authors.lastname: Schmidt
keywords: free-electron laser; simulations; undulator beamline design