Electron source concept for single-shot sub-100 fs electron diffraction in the 100 keV range

By T. V. Oudheusden, E. D. Jong, B. Siwick, S. Geer, W. O. Root, O. U. D. O. Physics, E. U. O. Technology, Eindhoven, The Netherlands, D. Physics and 4 more. 2007

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We present a method for producing sub-100 fs electron bunches that are suitable for single-shot ultrafast electron diffraction experiments in the 100 keV energy range. A combination of analytical estimates and state-of-the-art particle tracking simulations show that it is possible to create 100 keV, 0.1 pC, 30 fs electron bunches with a spot size smaller than 500 μm and a transverse coherence length of 3 nm, using established technologies in a table-top setup. The system operates in the space-charge dominated regime to produce energy-correlated bunches that are recompressed by radio-frequency techniques. With this approach we overcome the Coulomb expansion of the bunch, providing a single-shot, ultrafast electron diffraction source concept.

Subfields: Condensed Matter Physics, Electrical and Electronic Engineering, Structural Biology

View Paper: https://www.semanticscholar.org/paper/4c417e3406188b85298dadba1d085cc811c0a834