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Generation of monoenergetic ultrashort electron pulses from a fs laser plasma

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Abstract

Ultrashort high-energy electron beams are generated by focusing fs Ti:sapphire laser pulses on a thin metal tape at normal incidence. At laser intensities above 1016 W/cm2 , the fs laser plasma ejects copious amounts of electrons in a direction parallel to the target surface. These electrons are directly detected by means of a backside illuminated X-ray CCD, and their energy spectrum is determined with an electrostatic analyzer. The electrons were observed for two laser polarization directions, parallel and perpendicular to the observation direction. At the maximum applied intensity of 2×1017 W/cm2, the energy distribution peaks at around 35 keV with a hot tail detectable up to about 300 keV. The number of electrons per shot at 35 keV is about 5×108 per sterad per keV. Quasi-monoenergetic electron pulses with a relative energy spread of 1% were produced by using a 50-μm slit in the beam path after the analyzer. This approach offers great potential for time-resolved studies of plasma, liquid, and surface structures with atomic-scale spatial resolution.

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Authors and Affiliations

  1. Max-Planck-Institut für Quantenoptik, 85748, Garching, Germany

    R. Tommasini & E.E. Fill

  2. University of Nevada, Reno, NV, 89557, USA

    R. Bruch

  3. Universität Düsseldorf, 40225, Düsseldorf, Germany

    G. Pretzler

Authors
  1. R. Tommasini
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  2. E.E. Fill
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  3. R. Bruch
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  4. G. Pretzler
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Corresponding author

Correspondence to E.E. Fill.

Additional information

PACS

41.75.Fr; 52.38.Kd; 52.70.Nc

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Tommasini, R., Fill, E., Bruch, R. et al. Generation of monoenergetic ultrashort electron pulses from a fs laser plasma. Appl. Phys. B 79, 923–926 (2004). https://doi.org/10.1007/s00340-004-1693-1

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  • DOI: https://doi.org/10.1007/s00340-004-1693-1

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