Demonstrator System for the Phase-I Upgrade of the Trigger Readout Electronics of the ATLAS Liquid-Argon Calorimeters

The trigger readout electronics of the ATLAS Liquid Argon Calorimeters are foreseen to be improved for the Phase-I luminosity upgrade of the LHC, in 2019, in order to enhance the trigger feature extraction. Signals with higher spatial granularity will be digitized and processed by newly developed front-end and back-end components. In order to evaluate technical and performance aspects, a demonstrator system is being developed, with the intention of installing it on the ATLAS detector for operation during the data-taking period beginning in 2015. Results from system tests of the analog signal treatment, the trigger digitizer, the optical signal transmission and the FPGA-based back-end modules will be reported.