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Figure 1
Six successive data frames obtained by collapsing 15 successive low-fluence frames together. Each collapsed frame has 48 photons on average. The locations of the photons have been emphasized to improve visibility. Although the crystal rotates slightly between these frames (0.015°), this rotation is below the instrumental divergence in the apparatus. At high fluence per frame, each of these frames would look similar. The observed difference between these frames, and the lack of any discernible Bragg pattern, show the data to be well within the sparse-data regime.

ISSN: 2052-2525