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. 2016 Dec 14;7:13686. doi: 10.1038/ncomms13686

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Copyright © 2016, The Author(s)

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Density distribution of electrons (a), γ photons (b) and positrons (c) at t=36T₀. Both lasers enter the simulation box at t=0T₀ and arrive at the open mouths of the double-cone-target at t=5T₀. Two dense electron bunches are formed around the laser axis in the double-cone due to the radiation trapping effect, with high energy (∼5 GeV) and a high density (∼40 n_c).