Patent ID: 7552017

Claim:
A tailpulse signal generator comprising: digital signal processor (DSP) for generating digital tailpulse signals from gamma energy spectrum data, said DSP adapted to: pseudo-randomly select energy values from the spectrum data and pseudo-randomly select pulse time intervals; produce digital pulse amplitude values corresponding to the number of events at the selected energy values and at the selected time intervals; exponentially decay the pulse amplitude values in time; at each selected time interval, add a new pulse amplitude value to an old exponentially decaying amplitude pulse value; and exponentially decay the resulting pulse amplitude value in time to simulate the pileup effect; a digital-to-analog converter (DAC) operably connected to receive said digital tailpulse signals from said DSP and produce analog voltage signals therefrom to simulate tailpulses characteristic of the gamma energy spectrum; and means for supplying power to said tailpulse signal generator.