Fig. 8
From: Generation of giga-electron-volt proton beams by micronozzle acceleration
Scaling of the maximum proton energy \(\mathcal {E}_{\textrm{max}}\) versus the laser intensity \(I_L\), under the different laser and target conditions. The MNA target shows the stronger dependence on \(I_L\) then the other two kinds of targets. The specific laser and targets parameters are the same as in Fig. 4.
