Characterization of self-injected electron beams from LWFA experiments at SPARC_LAB


The plasma-based acceleration is an encouraging technique to overcome the limits of the accelerating gradient in the conventional RF acceleration. A plasma accelerator is able to provide accelerating fields up to hundreds of GeV/mGeV/m, paving the way to accelerate particles to several MeV over a short distance (below the millimetre range). Here the characteristics of preliminary electron beams obtained with the self-injection mechanism produced with the FLAME high-power laser at the SPARC_LAB test facility are shown. In detail, with an energy laser on focus of 1.5 J1.5\ J and a pulse temporal length (FWHM) of 40 fs40\ fs, we obtained an electron plasma density due to laser ionization of about 6×1018 cm36 \times 10^{18}\ cm^{-3}, electron energy up to 350 MeV350\ MeV and beam charge in the range (50100) pC(50 - 100)\ pC.Comment: 6 pages, 11 figures, conference EAAC201

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