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A digital shaper for high-count-rate detection and amplitude measurement ofpulses is proposed and analysed in this paper. The proposed shaper convertspulses with a short leading edge and a long exponential tail into a trueGaussian form. The width of Gaussian pulses can be several times smaller thanthe rise time of the input pulses, i.e. considerably shorter than theundistorted output pulses provided by standard shapers. Therefore, the proposedtrue Gaussian shaper resolves strongly overlapped pulses better and provides ahigher output count rate. The capabilities of the proposed true Gaussian shaperare analysed with real and simulated output signals of a silicon drift detectorof soft X-ray radiation, operating at a high count rate of the collectedquanta. Our analysis shows that true Gaussian shapers can increase the countrate of spectrometer systems several times compared with the widely usedtrapezoidal shapers, while maintaining their amplitude resolution.

True Gaussian shaping for high count rate measurements of pulse amplitudes