Production of ultracollimated bunches of multi-MeV electrons by 35 fs laser pulses propagating in exploding-foil plasmas

Giulietti, D.; Galimberti, M.; Giulietti, A.; Gizzi, L. A.; Numico, R.; Tomassini, P.; Borghesi, M.; Malka, V.; Fritzler, S.; Pittman, M.; Ta Phouc, K.; Pukhov, A.
September 2002
Physics of Plasmas;Sep2002, Vol. 9 Issue 9, p3655
Academic Journal
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[sup 9] electrons per shot were accelerated, most of which in a beam of aperture below 10[sup -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.


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