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Figure 3
The (10, 16, 12) reflection at ∼3.3 Å resolution on consecutive frames and the distribution of integrated pixel values. Pixel values recorded on the Falcon III (top row; rotation speed dφ/dt = 0.45° s−1, Δφ = 0.45° per frame) and the CetaD (bottom row; rotation speed dφ/dt = 0.30° s−1, Δφ = 0.46° per frame) cameras. The central panel in each row shows the profile-fitted intensities as integrated by MOSFLM, where the error bars span one standard deviation of the integrated intensity and a Gaussian function, based on the progression of the reflection through the diffractive condition, has been fitted to aid the eye. For both the Falcon III and the CetaD, the pixel values in a 11 × 11 pixel box centered on the predicted spot locations are within the linear range of the detector, limited by the vertical dotted line (right panel). The physical pixel sizes on both cameras are identical (14 µm, square). Note that the peak counts on the CetaD are more than an order of magnitude higher than on the Falcon III, as the Falcon III in integrating mode reports the average pixel values of the individual frames at 40 Hz.

Volume 6| Part 5| September 2019| Pages 921-926
ISSN: 2052-2525