Fig. 3: The effect of the μ-bar thickness.
From: Ion acceleration from micrometric targets immersed in an intense laser field
a Proton cutoff energies (blue) and the maximal amplitude of the sheath field (sampled at t = 60 fs, red). b The density and average energy of electrons in the sheath sampled at t = 60 fs for d = 0.2 μm and w = 2–10 μm μ-bars. c Same as (b) for w = 2 μm and d = 0.2 to −1.0 μm μ-bars. d Density distributions of the electron sheath forming at t = 60 fs around w = 2 μm, d = 0.2 μm (top) and 0.6 μm (bottom) μ-bars. Electrons originating from the front side or the back side of the target are shown on the left and right, respectively.
