Speaker
Description
The new readout electronics of the CMS Drift Tubes detector has been evaluated in terms of its reliability. Starting with a brief overview of the main board functionalities, operating requirements and critical elements, a first estimation of the hardware robustness with respect to expected faults in time is then presented. A global figure of merit is derived by means of a custom-developed software model accounting for the reliability data of each component and applying proper derating based on worst-case operating conditions. This is also going to be the occasion to highlight some peculiar design choices intended to limit the various stress sources related to the detector operating environment. Finally, the functional robustness of the board with respect to ionizing radiation is presented, discussing the setup, objectives, and results of two measurement campaigns that have been undertaken to this aim at the Trento Proton Therapy Centre. Most importantly, apart from analysing the type and condition of occurrence of every observed component failure, the resilience of the hardware/firmware combination is debated, projecting the expected need for intervention during the future measurement runs of High-Luminosity LHC.