Figure 2
From: Single Shot Coherence Properties of the Free-Electron Laser SACLA in the Hard X-ray Regime

(a) Single shot speckle contrast βs from 2000 consecutive shots calculated at q = 0.041 nm−1. (b) Histogram of βs. The solid line represents a lognormal distribution using a mean value of 0.7 and a width of 0.105. (c) Speckle contrast βs as function of q averaged over 2000 consecutive single shots. The error bars represent the standard deviation of the single shot values from the averaged value.