Sketch of the experimental apparatus.
Sketch of the system composed by electrostatic barrier (EB) and Faraday cup (FC).
Energy distributions for Cu+1 and Cu+2 particles at the laser fluence of 0.6 J/cm2.
Ion signals at different acceleration voltages. Laser fluence: 6.0 J/cm2, Va: 0–20 kV.
Photo of the flange with the 9 cups utilized for divergence measurements.
Maximum half angle (degree) of divergence trend as a function of the accelerating voltage for different laser fluences.
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