Speaker
Description
Future collider experiments (e.g., HL-LHC, FCC) will require highly efficient silicon particle detectors able to operate in extremely harsh radiation environments ($\sim 10^{17} \, \text{1 MeV} \, \text{neq/cm}^2$). The guard-ring (GR) protection structures are an essential part of the sensor. They have to sustain a large external bias with minimal leakage current injection into the core region, making their design and optimisation crucial, especially when using thin sensor substrates.
In the framework of the "eXFlu-innova" research project (AIDAinnova), different GR optimisation studies for both p- and n-type thin substrates (ranging from $15$ to $55 \, \text{μm}$) have been conducted up to very high fluences (above $10^{17} \, \text{1 MeV} \, \text{neq/cm}^2$). These studies have been made possible thanks to ad-hoc Technology CAD (TCAD) modelling of various GR design strategies, accounting for comprehensive bulk and surface radiation-induced damage effects, and an extensive test campaign on such GR structures, both before and after irradiation.
In this contribution, the validation of the development framework for the different GR design options before and after irradiation is presented, involving an analysis of the agreement between simulated and experimental data, and the impact of the various design options on the sensor performance.
