Compression of sub-relativistic space-charge-dominated electron bunches for single-shot femtosecond electron diffraction

Abstract

We demonstrate compression of 95 keV, space-charge-dominated electron bunches to sub-100 fs durations. These bunches have sufficient charge (200 fC) and are of sufficient quality to capture a diffraction pattern with a single shot, which we demonstrate by a diffraction experiment on a polycrystalline gold foil. Compression is realized by means of velocity bunching as a result of a velocity chirp, induced by the oscillatory longitudinal electric field of a 3 GHz radio-frequency cavity. The arrival time jitter is measured to be 80 fs.

References in corpus (1)

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

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