A 40 MHz Level-1 trigger scouting system for the CMS Phase-2 upgrade

The CMS Phase-2 upgrade for the HL-LHC aims at preserving and expanding current physics capability of experiment under extreme pileup conditions. A new tracking system incorporates a track finder processor, providing tracks to Level-1 (L1) trigger. high-granularity calorimeter provides fine-grained energy deposition information in endcap region. New front-end back-end electronics feed L1 trigger with high-resolution from barrel muon systems. upgraded will be based primarily on Xilinx Ultrascale Plus series FPGAs, capable sophisticated feature searches resolution often similar offline reconstruction. Data Scouting (L1DS) capture intermediate data produced by processors beam-crossing rate 40 MHz, carry out online analyses these limited-resolution data. L1DS provide fast virtually unlimited statistics detector diagnostics, alternative luminosity measurements, and, some cases, calibrations. It also has potential enable study otherwise inaccessible signatures, either too common fit accept budget or requirements that are orthogonal “mainstream” physics. architecture presented, as well opportunities study. first results assembly commissioning demonstrator currently being installed LHC Run-3 presented. collects Global Muon Trigger, Layer-2 Calorimeter Barrel Track Finder, Trigger systems L1. This demonstrator, acquisition (DAQ) operating bunch-crossing rate, faces many challenges system, albeit scaled-down connectivity, reduced throughput capabilities, testing ground techniques reduction processing.