Patent ID: 6901337

Claim:
An energy measurement apparatus which integrates the signal intensity of the pulse waveform of a signal pulse for measurement to measure the energy of said signal pulse, comprising: trigger signal generation means, which accepts as input one of the branched signal pulses of the inputted signal pulse and generates a trigger signal corresponding to said signal pulse; gate signal generation means, which accepts as input said trigger signal from said trigger signal generation means, and based on said trigger signal, generates a gate signal to indicate integration of the signal intensity; pulse interval measurement means, which accepts as input said trigger signal from said trigger signal generation means, and measures the time interval from said trigger signal until the next trigger signal as the pulse interval of said signal pulse; delay means, which accepts as input another of said inputted branched signal pulses, and delays said signal pulse by a prescribed delay time; gate integration means, which accepts as input said signal pulse delayed by said delay means and said gate signal from said gate signal generation means, and integrates the signal intensity of said signal pulse for a prescribed integration time which is set based on the indication of said gate signal, to acquire the integrated signal intensity; and, energy calculation means, which calculates the energy corresponding to the total integrated intensity of said signal pulse from said integrated signal intensity acquired by said gate integration means and from said pulse interval measured by said pulse interval measurement means; and wherein said energy calculation means performs pileup correction of uncorrected energy calculated from said integrated signal intensity and said pulse interval of said signal pulse for measurement, using at least one of said integrated signal intensity or said energy, and said pulse interval, of the signal pulse inputted prior to the signal pulse for measurement to calculate said corrected energy.