Disputation: Roberto Calogero Cardella
Doctoral candidate Roberto Calogero Cardella at the Department Of Physics, Faculty of Mathematics and Natural Sciences, is defending the thesis
CMOS Detector and System Developments for LHC Detector Upgrades
for the degree of Philosophiae Doctor.
Trial lecture - time and place
Conferral summary / Kreeringssammendrag
This thesis focuses on the design of novel CMOS pixel sensors for high energy physics experiments. This new devices will contribute to improve the future discoveries at CERN in Geneva.
Main research findings / Hovedfunn
The CERN Large Hadron Collider (LHC) in Geneva has already achieved remarkable milestones, such as the discovery of the Higgs boson in 2012. Between 2024 and 2026, the accelerator will be upgraded to the High-Luminosity LHC to improve the precision of the measurements and enable the search for new physics. The renewed machine sets new challenges to the experiments, which need to upgrade several of their sub-detectors. Pixel sensors are the closest to the collision point and will be exposed to a ten-fold increased level of radiation and a much higher data rate. This work focus on the design of novel large area radiation-hard monolithic pixel sensors, targeting the ATLAS experiment upgrade. For decades, hybrid pixel sensors have been preferred mainly because of their good radiation hardness. The several sensors developed in this work demonstrate that this novel monolithic technology can withstand the level of radiation required by the High-Luminosity LHC experiments. Besides, the technology is promising to improve the tracker performance reducing the detector material. This Ph.D. thesis includes as well several studies concerning the integration of monolithic pixels in trackers. Therefore, it represents a considerable step towards the use of this technology in future high energy experiments.