Figure 5
Vertical beam profile I(Y) of focused (solid circles) and unfocused (solid squares) beam at 3.1 m from the exit of the lens measured with a wire of diameter 2.5 µm. The intensity has been normalized in such a way that the intensity of the primary beam is equal to 1. The solid line represents a Gaussian fit to the focused beam. The FWHM of the fitted Gaussian is 5.5 µm.  [article HTML]