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Updated: Jan 7, 2026

$Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene$

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Shot-to-shot acquisition ultrafast electron diffraction.

Rémi Claude¹, Michele Puppin², Bruce Weaver

¹École Polytechnique Fédérale de Lausanne, Laboratory of Ultrafast Microscopy and Electron Scattering (LUMES), IPHYS, Faculty of Basic Sciences, Station 6, CH-1015 Lausanne, Switzerland.

Structural Dynamics (Melville, N.Y.)

|January 1, 2026

Summary

This summary is machine-generated.

We developed a new shot-to-shot acquisition method for ultrafast electron diffraction experiments. This technique significantly enhances signal-to-noise ratio, improving data quality in scattering studies.

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Area of Science:

Ultrafast electron scattering
Materials science
Physical chemistry

Background:

Ultrafast scattering experiments require high signal-to-noise ratios for accurate data.
Conventional setups often face limitations in data acquisition speed and quality.
Improving resolution in time-resolved electron diffraction is crucial for studying dynamic processes.

Purpose of the Study:

To introduce a novel shot-to-shot acquisition method for optical pump-keV electron energy probe.
To enhance the signal-to-noise ratio in ultrafast scattering experiments.
To characterize the noise performance of the new acquisition scheme.

Main Methods:

Integration of a phase-locked acquisition scheme into a conventional ultrafast electron diffraction setup.
Operation at a high repetition rate of 20 kHz.
Comprehensive noise level characterization under various configurations and realistic scenarios.

Main Results:

The shot-to-shot acquisition method improves the signal-to-noise ratio by one order of magnitude.
Detailed noise characterization was performed for different experimental configurations.
The method demonstrates robustness in realistic experimental scenarios.

Conclusions:

The novel shot-to-shot acquisition method offers a significant improvement in data quality for ultrafast scattering.
This technique is readily implementable in other high-repetition-rate electron diffraction and spectroscopy setups.
The enhanced signal-to-noise ratio facilitates more precise investigations of ultrafast phenomena.