Very collimated bunches of high energy electrons have been produced by focusing super-intense femtosecond laser pulses in submillimeter under-dense plasmas. The density of the plasma, preformed with the laser exploding-foil technique, was mapped using Nomarski interferometry. The electron beam was fully characterized: up to 10(9) electrons per shot were accelerated, most of which in a beam of aperture below 10(-3) sterad, with energies up to 40 MeV. These measurements, which are well modeled by three-dimensional numerical simulations, validate a reliable method to generate ultrashort and ultracollimated electron bunches. (C) 2002 American Institute of Physics.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
Giulietti, D., Galimberti, M., Giulietti, A., Gizzi, L. A., Numico, R., Tomassini, P., Borghesi, M., Malka, V., Fritzler, S., Pittman, M., Phouc, K. T., & Pukhov, A. (2002). Production of ultracollimated bunches of multi-MeV electrons by 35 fs laser pulses propagating in exploding-foil plasmas. Physics of Plasmas, 9(9), 3655-3658. https://doi.org/10.1063/1.1498116