Signal processing for CdTe detectors using a fast signal digitizing technique

To suppress the charge collection loss variation in CdTe detectors, a signal processing method has been developed using a fast signal digitizing technique. Signal pulse waveforms were described as a modeling function. Then a set of model waveform patterns has been calculated for reference patterns. The most probable waveform pattern was selected by the pattern matching method which assures a finite calculation time. Obtained residue values were used for the further selection in the correction method. An energy resolution of 8.9 keV was obtained after the correction and selection of measured pulse signals for the Cs-137 662 keV photopeak. This method can be applied to a detector having any electrode configuration if the signal pulses from that configuration are given.