Simulation of irradiated hybrid planar pixels modules at fluences expected at HL-LHC

TL;DR

This paper validates combined TCAD and Monte Carlo simulations to predict charge collection in irradiated hybrid planar pixel detectors at HL-LHC, aiding in operational planning and algorithm testing.

Contribution

It introduces a validation approach for simulation models of irradiated pixel sensors, comparing trapping models to improve prediction accuracy.

Findings

Different trapping models compared for best fit

Predictions of charge collection at HL-LHC conditions

Enhanced understanding of radiation effects on pixel sensors

Abstract

Signal loss is the main limitation on tracking/vertexing performance due to radiation damage effect to hybrid pixel detectors when irradiated at fluences expected at High Luminosity LHC (HL-LHC). It is important to have reliable predictions on the charge collection performance after irradiation in order to predict operational voltage values and test tracking algorithms robustness. In this paper the validation of combined TCAD and Monte Carlo simulations of hybrid silicon planar pixels sensors will be presented. In particular different trapping models will be compared to identify the one giving the best predictions. Eventually predictions on the collected charge performance of planar pixels modules at HL-LHC will be discussed.