Speaker
Description
The High-Luminosity LHC (HL-LHC) presents challenges due to up to $200$ simultaneous interactions per beam crossing, where around $10\sim15\%$ of the reconstructed vertices are composed of multiple interactions time-separated by about $\sim150~\text{ps}$, which degrades the performance and the accuracy of the event reconstruction. To mitigate this, it is required to employ more precise timing information. The present work has the objective of simulation, characterization, and calibration of hybrid Ultra-Fast Silicon Detectors (UFSD) based on Low-Gain Avalanche Diode (LGAD) sensors, aiming at a timing resolution with uncertainty of $~\sim10~\text{ps}$. The methodology is divided into two specific objectives: (1) the computational simulation of the sensor's response with Allpix Squared (AP$^{2}$), COMSOL, and Garfield++, utilizing the ROOT Framework for Data Analysis and Geant4 for graphical visualization; (2) and the experimental characterization that is performed using pulsed lasers and radioactive sources, to study the sensor's response to traversing particles.
