Speaker
Description
The High-Luminosity LHC (HL-LHC) will operate with up to 200 simultaneous proton–proton interactions per bunch crossing, requiring upgraded detector readout, triggering, and data acquisition systems. The Phase-2 CMS Outer Tracker introduces new detector modules and a trigger architecture designed to contribute to online trigger decisions within 12.5 $\mu$s. Demonstrating the performance and operational behaviour of this system prior to HL-LHC data taking is an important step toward operational readiness.
A CMS Tracker Phase-2 Cosmic Rack setup has been assembled, consisting of a vertical array of Outer Tracker ladders, each instrumented with twelve Outer Tracker modules. The system is integrated using a readout and processing architecture based on ATCA electronics and prerequisite firmware and software. The rack is operated with cosmic-ray muons, with the ability for self-triggering in addition to the provision of an independent trigger based on scintillator tiles instrumented with photomultiplier tubes.
This setup enables end-to-end integration tests of the trigger and DAQ chain, and provides a platform for developing and validating commissioning procedures. It also supports studies of detector synchronisation, backend system performance, online control, and offline reconstruction. First performance results from the system are presented.