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Figure 1
Concept of accelerator-based high-energy electron diffraction with MeV electrons. Electrons are emitted by illumination of the photocathode with short UV pulses, and are then immediately accelerated to energies of 2–5 MeV in a 1.5 cell RF cavity with field gradients of up to 110 MV m−1. The electron pulses (red dots) then interact with the sample, which is mounted on a single-axis goniometer for crystallographic data collection. While the sample is rotated in the electron beam, diffraction patterns are recorded on a Jungfrau 1M integrating pixel detector.

IUCrJ
Volume 13| Part 3| May 2026| Pages 282-290
ISSN: 2052-2525
https://doi.org/10.1107/S2052252526002782