Speaker
Description
ATLAS is expected to receive 10 times the integrated luminosity from the High-Luminosity Large Hadron Collider (HL-LHC) than the previous three LHC runs combined, with approximately 200 interactions per bunch crossing, leading to significant pileup. The ATLAS Trigger and Data Acquisition system is undergoing significant upgrades to manage this pileup increase. As a part of these upgrades, the planned Global Trigger system will implement offline-inspired algorithms on full-granularity calorimeter information distributed by a series of time multiplexers (MUX) at 40 MHz.
GEP and MUX nodes are housed on Field Programmable Gate Arrays (FPGA). The Global Trigger design will be realized through a common hardware module, the Global Common Module (GCM). Each GCM will contain two FPGAs, one for a MUX and a GEP, with roughly 60 GCMs planned in total. Time multiplexing and inter-GCM communication are challenging to synchronize at this scale, and require a tiered approach to testing. Integration and production tests on GCMs are being conducted at Brookhaven National Lab, and testing will continue on a “slice” of 5 GCMs next year. This presentation will focus on the current software package for these tasks, the general status of the GCM testing, as well as progress on MUX firmware testing.
