A tip-based source of femtosecond electron pulses at 30keV

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2013
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Hoffrogge, Johannes
Paul Stein, Jan
Förster, Michael
Hammer, Jakob
Ehberger, Dominik
Hommelhoff, Peter
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Journal of Applied Physics. 2013, 115(9), 094506. ISSN 0021-8979. eISSN 1089-7550. Available under: doi: 10.1063/1.4867185
Zusammenfassung

We present a nano-scale photoelectron source, optimized towards ultrashort pulse durations and well-suited for time-resolved diffraction experiments. A tungsten tip, mounted in a suppressor-extractor electrode configuration, allows the generation of 30 keV electron pulses with an estimated pulse duration of 37 fs 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. We furthermore demonstrate femtosecond laser-triggered operation. Besides the short electron pulse duration, a tip-based source is expected to feature a large transverse coherence as well as a nanometric emittance.

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ISO 690HOFFROGGE, Johannes, Jan PAUL STEIN, Michael KRÜGER, Michael FÖRSTER, Jakob HAMMER, Dominik EHBERGER, Peter BAUM, Peter HOMMELHOFF, 2013. A tip-based source of femtosecond electron pulses at 30keV. In: Journal of Applied Physics. 2013, 115(9), 094506. ISSN 0021-8979. eISSN 1089-7550. Available under: doi: 10.1063/1.4867185
BibTex
@article{Hoffrogge2013-03-10T22:00:11Ztipba-43276,
  year={2013},
  doi={10.1063/1.4867185},
  title={A tip-based source of femtosecond electron pulses at 30keV},
  number={9},
  volume={115},
  issn={0021-8979},
  journal={Journal of Applied Physics},
  author={Hoffrogge, Johannes and Paul Stein, Jan and Krüger, Michael and Förster, Michael and Hammer, Jakob and Ehberger, Dominik and Baum, Peter and Hommelhoff, Peter},
  note={Article Number: 094506}
}
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