Figure 17.

Shift of the pedestal in frames without photons. The irradiated pixels are pixel C (x = 86 y = 254) and pixel R (x = 87 y = 254). The energy position of the pedestal of the eight previously observed pixels is plotted as function of the interaction point in the irradiated pixels. Only frames without photon hits were used for this analysis. The pedestal shift is present, when photons are absorbed in the half of the sensor closer to the readout electrode and it can reach values down to –2 keV. No relaxation effect could be observed, i.e., this pedestal shift has some temporal persistence which has not been further characterized.