Report for Syracuse Electronics Quality Assurance of components of the Upstream Tracker Detector for the LHCb Upgrade I

The Upstream Tracker (UT) detector is a large-area silicon detector that is part of the LHCb Upgrade. The UT is composed of four large planes, each of approximately 2 m² area, and includes about 1000 silicon modules. The modules are mounted on structural supports that provide both precise alignment and integrated bi-phase CO₂ cooling. Each module is composed of a silicon sensor, a flex hybrid containing 4 (or 8) custom ASICs, and a BN stiffener. The UT detector is an integral part of the lowest level trigger in the LHCb upgrade, and is critical to meeting the timing requirements to have a fully software-based trigger in LHCb at the nominal operating luminosity. To that end, a single hit efficiency of larger than about 99% and high S/N are mandatory. In this talk we will discuss the numerous quality assurance tests performed to ensure that the installed UT detector meets the requirements of the LHCb upgrade.