Heidelberg 2022 – scientific programme

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T: Fachverband Teilchenphysik

T 40: Pixel Detectors 2

T 40.4: Talk

Tuesday, March 22, 2022, 17:00–17:15, T-H25

The Allpix Squared pixel detector simulation framework — •Håkan Wennlöf, Simon Spannagel, and Paul Schütze — DESY, Notkestrasse 85, 22607 Hamburg, Germany

The Allpix Squared sensor simulation framework is a modular and flexible open-source tool for simulating pixel detectors. The framework has the capability of simulating the full detector chain, from energy deposited by incident particles to signal formation and digitisation. Both single detectors and more complex setups, such as testbeam telescope experiments, can be investigated in great detail. Through its interface to GEANT4, Allpix Squared has access to advanced physics models and particle sources. The framework can also import fields and doping maps from technology computer-aided design (TCAD) simulations, creating a detailed simulation of individual charge carrier behaviour in the investigated sensor models. This yields a powerful combination of TCAD and Monte Carlo simulations, which provides accurate high-statistics results while also accounting for stochastic fluctuations in the involved processes. This method has been used in comparing simulations with testbeam data, and finding a good match between results. Through the detailed electric field inclusion, time-dependent charge pulse formation can also be simulated in the framework.

Allpix Squared is currently used as part of developments of several state-of-the art sensors, for example in the Tangerine project at DESY. This contribution will present the current status of the Allpix Squared framework, and give examples of use cases.