Tip-based source of femtosecond electron pulses at 30 keV

Journal article

Publication Details

Author(s): Hoffrogge J, Stein JP, Krüger M, Förster M, Hammer J, Ehberger D, Baum P, Hommelhoff P
Journal: Journal of Applied Physics
Publisher: American Institute of Physics (AIP)
Publication year: 2014
Volume: 115
Pages range: 094506
ISSN: 0021-8979


We present a nano-scale photoelectron source, optimized for ultrashort pulse durations and well-suited for time-resolved diffraction and advanced laser acceleration experiments. A tungsten tip of several-ten-nanometers diameter mounted in a suppressor-extractor electrode configuration allows the generation of 30 keV electron pulses with an estimated pulse duration of 9 fs (standard deviation; 21 fs full width at half maximum) at the gun exit. We infer the pulse duration from particle tracking simulations, which are in excellent agreement with experimental measurements of the electron-optical properties of the source in the spatial domain. We also demonstrate femtosecond-laser triggered operation of the apparatus. The temporal broadening of the pulse upon propagation to a diffraction sample can be greatly reduced by collimating the beam. Besides the short electron pulse duration, a tip-based source is expected to feature a large transverse coherence and a nanometric emittance. © 2014 AIP Publishing LLC.

FAU Authors / FAU Editors

Ehberger, Dominik
Lehrstuhl für Laserphysik
Förster, Michael Dr.
Lehrstuhl für Laserphysik
Hammer, Jakob
Lehrstuhl für Laserphysik
Hommelhoff, Peter Prof. Dr.
Lehrstuhl für Laserphysik
Krüger, Michael
Lehrstuhl für Laserphysik

External institutions with authors

Max-Planck-Institute of Quantum Optics (MPQ) / Max-Planck-Institut für Quantenoptik

How to cite

Hoffrogge, J., Stein, J.P., Krüger, M., Förster, M., Hammer, J., Ehberger, D.,... Hommelhoff, P. (2014). Tip-based source of femtosecond electron pulses at 30 keV. Journal of Applied Physics, 115, 094506. https://dx.doi.org/10.1063/1.4867185

Hoffrogge, Johannes, et al. "Tip-based source of femtosecond electron pulses at 30 keV." Journal of Applied Physics 115 (2014): 094506.


Last updated on 2018-18-12 at 13:50