Speaker
Description
The High-Luminosity LHC (HL-LHC) will deliver instantaneous luminosities that result in up to 200 simultaneous proton–proton interactions per bunch crossing. Operating under these conditions requires upgrades to the detector readout, trigger, and data acquisition systems. The Phase-2 CMS Outer Tracker features newly designed detector modules and a trigger architecture capable of contributing to Level-1 trigger decisions within a latency of 12.5 μs. Validating the performance and operational stability of this system ahead of HL-LHC data taking is a key milestone toward full detector readiness.
A dedicated Phase-2 CMS Tracker Cosmic Rack has been constructed, comprising a vertical arrangement of Outer Tracker ladders, each hosting twelve tracking modules. The setup is operated using a processing chain based on ATCA hardware, together with CMS baseline firmware and software infrastructure. Data are collected using cosmic-ray muons, with both a self-triggering capability provided by the modules and an independent trigger provided by scintillator tiles instrumented with photomultiplier tubes.
This system serves to exercise the complete trigger and DAQ chain in an integrated environment and to establish and refine commissioning procedures relevant for HL-LHC operation. It also provides a development platform for backend electronics, detector synchronisation studies, online control systems, and offline reconstruction workflows. The current status of the setup and the performance of its key components within the fully integrated chain will be discussed, along with preliminary results.