Speaker
Description
The XAFS-DET (Work Package 2) of the European LEAPS-INNOV project has undertaken an ambitious research and development program for a new generation of multi-element monolithic germanium detectors best suited for synchrotron applications XAFS-DET: A new high throughout X-ray spectroscopy detector system developed for synchrotron applications. The detector has a new age sensor design for charge-sharing event rejection, an optimized mechanic design based on thermal simulations, and a new full electronics. In this regard, we have conducted simulations of the detector response by integrating the versatile Geant4 toolkit and Solid State Detector (SSD) packages Simulation of semiconductor detectors in 3D with SolidStateDetectors.jl. With this code, we can estimate the induced waveforms in adjacent pixels based on event positioning, aiming to reject the multi-site and pile-up events using a Digital Pulse Processor (DPP) DANTE Digital Pulse Processor for XRF and XAS experiments, for an active refinement of the detector performance Development of multi-element monolithic germanium detectors for X-ray detection at synchrotron facilities.
Our findings shed light on the performance characteristics of Germanium detector prototypes using a known soil sample in environmental science (EnviroMAT), which allowed us to build a background model and to predict the expected signal at a given Photon flux. The simulation chain was calibrated by experimental data taken with a commercial high-purity germanium (HPGe) detector in the SAMBA beamline of Synchrotron SOLEIL and is illustrated in Fig 1
Fig 1: Full simulation chain: (i) Geometry of big pixel configuration of Ge detector produced using SSD simulation packages; (ii) simulated waveform for an event collected in a single contact using the hit information from Geant4 ; (iii) Comparison of simulations with the data acquired with commercial HPGe detector using EnviroMAT soil sample.
| I plan to submit also conference proceedings | Yes |
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