Fig. 3: Pulse-height distributions.
a Calibrated pulse-height distribution as a function of the X-ray photon energy for the shallow iLGAD variation, M = 4.8. The spectra are obtained as average after a pixel-wise calibration, and normalized to the peak integral. The gray band and horizontal arrow indicate the level at which a SNR of 5 is achieved, considering the ASIC settings optimized for 550 eV. The ASIC settings have been optimized for the individual energies. b Comparison of the calibrated pulse-height distributions obtained using a standard and a shallow iLGAD sensor variation at 900 eV, 700 eV, and 550 eV. The ASIC settings have been optimized for the individual energies and iLGAD sensor variations. Vertical lines indicate the levels at which a SNR = 5 is reached for each of the two sensor variations, considering the ASIC settings used for 550 eV. The curves have been normalized at the peak integral.
