Charm jet identification performance for the ATLAS experiment and development of future tracking detectors

ATLAS is a particle physics experiment at the Large Hadron Collider (LHC) operating at the CERN laboratory in Geneva. ATLAS is designed to be a general purpose detector: rather than focusing on a particular physical process, it can measure an entire range of signals in order to study many phenomena and search for new particles that could emerge from LHC collisions. During the course of my Ph.D. program, I contributed to several different activities in the context of the ATLAS experiment: from data taking to public outreach, including data quality assessment, b-tagging performance measurement, standard model physics measurement, test beam with detector components and R&D on silicon wafers in view of future tracking detectors. In this thesis, I will mainly focus on the measurement of the charm jet indentication performance by specialized b-tagging algorithms, which has been my main contribution, and on the test beam experiments performed on pixel detector modules with unprecendented high energy and intensity proton beam, for beam-loss scenario studies.