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arXiv · 0712.0594

Real-time digital signal processor implementation of self-calibrating pulse-shape discriminator for high purity germanium

R. Suarez·J. L. Orrell·C. E. Aalseth·T. W. Hossbach·H. S. Miley
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Abstract

Pulse-shape analysis of the ionization signals from germanium gamma-ray spectrometers is a method for obtaining information that can characterize an event beyond just the total energy deposited in the crystal. However, as typically employed, this method is data-intensive requiring the digitization, transfer, and recording of electronic signals from the spectrometer. A hardware realization of a real-time digital signal processor for implementing a parametric pulse shape is presented. Specifically, a previously developed method for distinguishing between single-site and multi-site gamma-ray interactions is demonstrated in an on-line digital signal processor, compared with the original off-line pulse-shape analysis routine, and shown to have no significant difference. Reduction of the amount of the recorded information per event is shown to translate into higher duty-cycle data acquisition rates while retaining the benefits of additional event characterization from pulse-shape analysis.

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R. Suarez, J. L. Orrell, C. E. Aalseth, T. W. Hossbach, H. S. Miley. 2007-12-04. Real-time digital signal processor implementation of self-calibrating pulse-shape discriminator for high purity germanium. https://doi.org/10.1016/j.nima.2007.11.075

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