Fig. 2.

(b) q-resolved diffraction pattern as acquired on CCD2. $\phi$ is the azimuthal angle. (a) Time evolution of the scattered intensity for a given scattering vector $\mathit{q}$, and (c) its autocorrelation function. (d) The autocorrelation function is averaged over $\phi$, i.e. over pixels inbetween the two white circles in (b).