Fig. 6

Axial (a) and transverse (b) cuts through simulated focal intensity distributions. Green lines denote the case of focusing with the full mirror, i.e. covering 94 % of the solid angle relevant for a linear dipole. Blue lines represent the results for focusing from half solid angle as explained in the text. The transverse cuts in (b) are taken at the axial positions with maximum intensity as marked by the arrows in (a). The intensities are given relative to the ones obtained without any aberrations but at same solid angle. The spread of the ion’s wave function is neglected in all simulations underlying this figure