Fig. 4 | Communications Physics

Fig. 4

From: Enhanced target normal sheath acceleration using colliding laser pulses

Fig. 4

Modification of the fields generating the hot electrons. a (resp (b)) Ex (blue) and Bz (red) fields on the target surface at t = 150 fs in the two-pulse case (resp. reference case). These fields are indicated in normalized units, i.e. me0/e for Ex and meω0/e for Bz, with me and e respectively the electron mass and elementary charge. The dashed black lines indicate the distribution of the initial y position on the target surface for the electrons reaching 400 keV during the simulation. For the reference case, this distribution is plotted in the frame moving with a c sin ϕ velocity along y to take into account the drifting of the fields. cf The reference simulation and gj the two-pulse case. c, g Longitudinal position qx, d, h longitudinal momentum px, e, i Ex (blue) and Bz (red) fields, and f, j qEx (blue) and qvy × Bz (red) forces experienced as a function of time for an accelerated electron in the two different cases. t = 0 corresponds to the time at which the particles reach their minimum longitudinal position

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