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

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

2007-02-02

arxiv.org/abs/physics/0702018v1

Physics

Accelerator Physics

Scientific paper

10.1063/1.2801027

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 results and state-of-the-art numerical simulations show that it is possible to create 100 keV, 0.1 pC, 20 fs electron bunches with a spotsize smaller than 500 micron and a transverse coherence length of 3 nm, using established technologies in a table-top set-up. The system operates in the space-charge dominated regime to produce energy-correlated bunches that are recompressed by established radio-frequency techniques. With this approach we overcome the Coulomb expansion of the bunch, providing an entirely new ultrafast electron diffraction source concept.

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