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Updated: Mar 18, 2026

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An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers
Published on: October 23, 2018
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Generation of ultra-large-bandwidth X-ray free-electron-laser pulses with a transverse-gradient undulator
Eduard Prat1, Marco Calvi1, Sven Reiche1
1Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
Journal of Synchrotron Radiation
|July 1, 2016
Abstract:
A new and simple method to generate X-ray free-electron-laser radiation with unprecedented spectral bandwidth above the 10% level is presented. The broad bandwidth is achieved by sending a transversely tilted beam through a transverse-gradient undulator. The extent of the bandwidth can easily be controlled by variation of the beam tilt or the undulator gradient. Numerical simulations confirm the validity and feasibility of this method.

