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Electron source

Pipe dream beam coming true

Delayed femtosecond photoemission from a single-walled carbon nanotube enables pulsed electron beams with an unprecedented combination of pulse duration and energy spread.

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Fig. 1: The longitudinal phase space occupation by pulsed electron beams in terms of the FWHM energy spread ∆E and the FWHM pulse duration ∆t.

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Correspondence to Jom Luiten.

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Luiten, J., Franssen, J. Pipe dream beam coming true. Nat. Mater. (2025). https://doi.org/10.1038/s41563-025-02347-y

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