Rostock 2019 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 24: Poster: Quantum Optics and Photonics I

Q 24.24: Poster

Dienstag, 12. März 2019, 16:30–18:30, S Fobau Physik

Characterization of laser-triggered high-brightness electron sources — •Leon Brückner, Norbert Schönenberger, and Peter Hommelhoff — Department Physik, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91058 Erlangen

Ultrashort electron pulses have become invaluable in research, for applications such as dielectric laser acceleration [1] or ultrafast electron microscopy [2]. These applications require high peak brightness and are therefore limited by the electron source. We investigate the performance and beam parameters of different high brightness needle tip electron sources [3,4]. The emitters are mounted in ultra-high vacuum in a commercial electron gun from a SEM and are operated either in DC mode or laser-triggered by UV laser pulses. The beam emittance is estimated by measuring the spot size on an MCP as a function of the focal strength of the electrostatic condenser lens of the electron gun and comparing the results with simulations.

[1] J. McNeur et al., Optica 5, 687-690 (2018)

[2] L. Piazza et al., Nature Communications 6, 6407 (2015)

[3] H. Zhang et al., Nature Nanotechnology 11, 273-279 (2016)

[4] S. Meier et al., Appl. Phys. Lett. 113, 143101 (2018)