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Figure 7
X-ray photon flux detected by the APD as a function of the real photon flux illuminating the APD (black line). A saturation of the detected photon flux can be observed for real photon fluxes above 109 photons s−1, due to the fact that the APD is not able to recognize multiphoton events within one bunch. The ideal purely linear response is marked by the dashed black line. The average number of photons emitted per bunch ν is shown by the red line. The white background identifies the linear regime, the light blue background the semi-linear regime, and the dark blue background the non-linear regime.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 28| Part 4| July 2021| Pages 1146-1158
https://doi.org/10.1107/S1600577521004240
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