Figure 5

Minimum beam size achievable with the optimised nozzle design for different parameters of the beam at the nozzle entrance. A blue colour represents a beam parametrisation suitable for minibeam generation. Top row: minimal hFWHM as function of \({x}^{^{\prime} }\) and \({r}_{x{x}^{^{\prime} }}\). Bottom row: minimal vFWHM as function of \({y}^{^{\prime} }\) and \({r}_{y{y}^{^{\prime} }}\). Note that possible values of the correlation coefficient range from \(-1\) to +1 and that the scales of the x- and y-axes are not linear.