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Field emitter is an important cathode to probe atomic structures of large unit-cell crystal samples by electron imaging and diffraction experiments because of the capability to produce high brightness electron beam with a large transverse coherence length. Despite the small energy spread, normally only the near-axis part of the beam is utilized because of the large geometrical angular spread at the...
We describe the implementation and detailed characterization of a laser-triggered field-emitter electron source integrated into a modified transmission electron microscope. Specifically, localized linear photoemission from the front facet of a tip-shaped ZrO/W(100) Schottky emitter is employed, yielding electron pulses with a spectral bandwidth of 0.6 eV and pulse durations down to 200 fs (full-width-at-half-maximum)...
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