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Updated: Apr 16, 2026

An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers

An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers

Published on: October 23, 2018

High-intensity double-pulse X-ray free-electron laser.

A Marinelli¹, D Ratner¹, A A Lutman¹

¹SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.

Nature Communications

|March 7, 2015

Summary

This summary is machine-generated.

Researchers generated powerful two-color hard X-ray pulses using an X-ray free-electron laser (XFEL). This breakthrough enhances peak power, enabling advanced experiments in photon science and biological imaging.

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Published on: August 6, 2018

Area of Science:

Photon science
X-ray science
Laser physics

Background:

X-ray free-electron lasers (XFELs) have revolutionized photon science with their high brightness.
Tailoring X-ray pulse properties, like spectral and temporal structure, is crucial for experimental needs.
Previous XFELs had limitations in peak power for advanced applications.

Purpose of the Study:

To report the generation of high-energy, short-duration two-color hard X-ray pulses.
To demonstrate an improved peak power performance in X-ray free-electron lasers.
To enable new scientific applications requiring intense and coherent X-ray sources.

Main Methods:

Utilized a novel X-ray free-electron laser (XFEL) configuration driven by twin electron bunches.
Employed the Linac Coherent Light Source (LCLS) for generating the X-ray pulses.
Achieved precise manipulation of the electron beam to tailor X-ray pulse characteristics.

Main Results:

Successfully generated millijoule-level, few-femtosecond duration, two-color hard X-ray pulses.
Achieved over an order of magnitude improvement in peak power compared to state-of-the-art two-color XFELs.
Demonstrated unprecedented intensity and temporal coherence of the generated X-ray pulses.

Conclusions:

The developed two-color hard X-ray free-electron laser (XFEL) represents a significant advancement in photon science.
This new capability opens doors for advanced experimental techniques, including X-ray pump/X-ray probe studies.
Enables high-resolution imaging of complex biological samples using advanced techniques like multiple wavelength anomalous dispersion.