Shaped cathodes for the production of ultra-short multi-electron pulses

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Abstract

An electrostatic electron source design capable of producing sub-20 femtoseconds (rms) multi-electron pulses is presented. The photoelectron gun concept builds upon geometrical electric field enhancement at the cathode surface. Particle tracer simulations indicate the generation of extremely short bunches even beyond 40 cm of propagation. Comparisons with compact electron sources commonly used for femtosecond electron diffraction are made.

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Petruk, A. A., Pichugin, K., & Sciaini, G. (2017). Shaped cathodes for the production of ultra-short multi-electron pulses. Structural Dynamics, 4(4). https://doi.org/10.1063/1.4974779

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