We have developed a compact streak camera suitable for measuring the duration of highly charged
subrelativistic femtosecond electron bunches with an energy bandwidth in the order of 0.1%, as
frequently used in ultrafast electron diffraction UED experiments for the investigation of ultrafast
structural dynamics. The device operates in accumulation mode with 50 fs shot-to-shot timing jitter,
and at a 30 keV electron energy, the full width at half maximum temporal resolution is 150 fs.
Measured durations of pulses from our UED gun agree well with the predictions from the detailed
charged particle trajectory simulations.