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 (LAr) Calorimeters will be improved for the Phase-I luminosity upgrade of the LHC, to enhance the trigger feature extraction. Signals with higher spatial granularity will be digitized and processed by newly developed front-end and back-end electronics. In order to evaluate the technical and performance aspects, a demonstrator system has been set up, and many off-detector tests have been done. Analog signal parameters including the noise and cross-talk have been measured. Digital signal treatment, and high-speed data transmission have been tested and verified. After a series of tests, the demonstrator system has been installed on the ATLAS detector for the LHC Run 2.