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Updated: May 19, 2026

An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers
Published on: October 23, 2018
Investigating the interaction of x-ray free electron laser radiation with grating structure
Jérôme Gaudin1, Cigdem Ozkan, Jaromír Chalupský
1European XFEL GmbH, Hamburg, Germany. jerome.gaudin@xfel.eu
Abstract:
The interaction of free electron laser pulses with grating structure is investigated using 4.6±0.1 nm radiation at the FLASH facility in Hamburg. For fluences above 63.7±8.7 mJ/cm2, the interaction triggers a damage process starting at the edge of the grating structure as evidenced by optical and atomic force microscopy. Simulations based on solution of the Helmholtz equation demonstrate an enhancement of the electric field intensity distribution at the edge of the grating structure. A procedure is finally deduced to evaluate damage threshold.
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