Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 81, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3292683
Keywords
dark conductivity; diffraction; electron beams; electron diffraction crystallography; gold; phase transformations; X-ray crystallography
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Single shot diffraction patterns using a 250-fs-long electron beam have been obtained at the UCLA Pegasus laboratory. High quality images with spatial resolution sufficient to distinguish closely spaced peaks in the Debye-Scherrer ring pattern have been recorded by scattering the 1.6 pC 3.5 MeV electron beam generated in the rf photoinjector off a 100-nm-thick Au foil. Dark current and high emittance particles are removed from the beam before sending it onto the diffraction target using a 1 mm diameter collimating hole. These results open the door to the study of irreversible phase transformations by single shot MeV electron diffraction.
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