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Updated: Jul 15, 2026

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

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Mega-electron-volt ultrafast electron diffraction at SLAC National Accelerator Laboratory.

S P Weathersby¹, G Brown¹, M Centurion²

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

The Review of Scientific Instruments

|August 3, 2015

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SLAC

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Area of Science:

Ultrafast electron diffraction (UED) and microscopy
Materials science
Chemical dynamics
Biological sciences

Background:

Ultrafast electron probes offer complementary capabilities to X-ray free-electron lasers.
High-brightness, relativistic electron beams with femtosecond pulse durations enable atomic-scale resolution of dynamic processes.

Purpose of the Study:

To report on the construction and performance of the SLAC mega-electron-volt (MeV) Ultrafast Electron Diffraction (UED) system.
To serve as the initial stage of the SLAC Ultrafast Electron Diffraction (UED) and microscopy Initiative.
To support ultrafast science experiments and advanced instrumentation development.

Main Methods:

Construction and commissioning of a new mega-electron-volt (MeV) Ultrafast Electron Diffraction (UED) system.
Operation at a 120-Hz repetition rate.
Performance characterization including reciprocal space resolution, temporal resolution, and machine stability.

Main Results:

The SLAC MeV UED system has been successfully constructed and commissioned.
The system demonstrates outstanding performance.
Key performance metrics such as resolution and stability have been evaluated.

Conclusions:

The SLAC MeV UED system represents a significant advancement in ultrafast electron scattering instrumentation.
The system is ready to support a wide range of ultrafast science experiments.
This development is a crucial step for the SLAC Ultrafast Electron Diffraction (UED) and microscopy Initiative.