Sep 12 – 17, 2021
University of Birmingham
Europe/London timezone

Generation and validation of a theoretical signal database for the Segmented Inverted-coaxial Germanium (SIGMA) Detector

Sep 15, 2021, 1:08 PM
Teaching and Learning Building (University of Birmingham)

Teaching and Learning Building

University of Birmingham

Edgbaston Campus University of Birmingham B15 2TT UK


AHMED ALHARBI (University of Liverpool (Nuclear Group))


The prototype SIGMA detector is the first p-type segmented inverted-coaxial germanium detector to be manufactured for γ-ray tracking and imaging purposes [1,2]. The γ-ray tracking and imaging capability of SIGMA requires a high precision of measuring the interaction positions of γ-ray radiation with the detector which is strongly dependent upon the achieved position resolution. The γ-ray interaction position is determined by extracting the charge pulses from both a small p-type point contact on the rare face of the detector and the outer n-type electrode which is electrically segmented into 18 segments. In order to determine the position resolution of SIGMA, pulse shape analysis (PSA) methods using chi-squared minimisation technique will be applied which require a signal database of all possible positions of γ-ray interactions with the detector volume. For this reason, the detector response has been simulated using Agata Detector Library (ADL) [3] to generate theoretical pulse shapes for the SIGMA detector. The simulated signals were validated against their equivalent experimental signals at known positions in order to build such signal database which is currently being developed.

Your name Ahmed Alharbi
Title Mr
Institute University of Liverpool
Nationality Saudi Arabia

Primary author

AHMED ALHARBI (University of Liverpool (Nuclear Group))


Daniel Judson (The University of Liverpool) Laura Harkness (University of Liverpool) Prof. Robert Page (University of Liverpool) Ellis Rintoul (University of Liverpool) Dr John Wright (University of Liverpool) Fiona Jane Pearce (University of Liverpool (GB)) Prof. David Radford (Oak Ridge National Laboratory)

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