Space-charge effects on short-pulse photoemission

We do molecular dynamics (MD) simulations [1], [2] with the RUMDEED code to investigate short-pulse photoemission from a microscale diode. The MD approach offers a high-fidelity model of discrete particle effects on electron emission and electron-electron scattering near the point of emission. We sh...

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Bibliographic Details
Published in2023 IEEE International Conference on Plasma Science (ICOPS) p. 1
Main Authors Arnason, H. O., Torfason, K., Manolescu, A., Valfells, A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 21.05.2023
Subjects
Brightness
Codes
Laser modes
Particle beams
Photoelectricity
Scattering
Semiconductor lasers
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Summary:We do molecular dynamics (MD) simulations [1], [2] with the RUMDEED code to investigate short-pulse photoemission from a microscale diode. The MD approach offers a high-fidelity model of discrete particle effects on electron emission and electron-electron scattering near the point of emission. We show that there are three emission regimes that depend on the ratio of laser pulse-length to the characteristic transit-time for the diode. We compare our results to popular models for space-charge effects on pulsed photoemission. We also demonstrate how to achieve maximum brightness for the beam, the effects of the emitter area, and of a heterogeneous work function.
ISSN:2576-7208
DOI:10.1109/ICOPS45740.2023.10480974