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- W2912457296 abstract "Tip-based photoemission electron sources offer unique properties for ultrafast imaging, diffraction, and spectroscopy experiments with highly coherent few-electron pulses. Extending this approach to increased bunch-charges requires a comprehensive experimental study on Coulomb interactions in nanoscale electron pulses and their impact on beam quality. For a laser-driven Schottky field emitter, we assess the transverse and longitudinal electron pulse properties in an ultrafast transmission electron microscope at a high photoemission current density. A quantitative characterization of electron beam emittance, pulse duration, spectral bandwidth, and chirp is performed. Due to the cathode geometry, Coulomb interactions in the pulse predominantly occur in the direct vicinity to the tip apex, resulting in a well-defined pulse chirp and limited emittance growth. Strategies for optimizing electron source parameters are identified, enabling advanced ultrafast transmission electron microscopy approaches, such as phase-resolved imaging and holography." @default.
- W2912457296 created "2019-02-21" @default.
- W2912457296 creator A5007081112 @default.
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- W2912457296 date "2019-01-01" @default.
- W2912457296 modified "2023-10-16" @default.
- W2912457296 title "Coulomb interactions in high-coherence femtosecond electron pulses from tip emitters" @default.
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- W2912457296 doi "https://doi.org/10.1063/1.5066093" @default.
- W2912457296 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6404915" @default.
- W2912457296 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30868085" @default.
- W2912457296 hasPublicationYear "2019" @default.
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