Tip-based source of femtosecond electron pulses at 30 keV

Hoffrogge J, Stein JP, Krüger M, Förster M, Hammer J, Ehberger D, Baum P, Hommelhoff P (2014)

Publication Type: Journal article

Publication year: 2014

Journal

Publisher: American Institute of Physics (AIP)

Book Volume: 115

Pages Range: 094506

DOI: 10.1063/1.4867185

Abstract

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.

Authors with CRIS profile

Involved external institutions

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

How to cite

APA:

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://doi.org/10.1063/1.4867185

MLA:

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

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