Studies on the Readout of the ATLAS Inner Tracker 2 Using Commercial Networking HardwareStudies on the Readout of the ATLAS Inner Tracker Using Commercial Networking Hardware

In the context of the ATLAS Phase-II upgrade, new front-end electronics is developed, which isread out with up to 5.12Gb/s per link due to finer granularity and higher occupancy.Because of the high bandwidth requirements, new concepts are needed for the ATLAS InnerTracker (ITk) readout system. A new scalable approach based on many rather simple nodes isproposed to support lab setups, testing sites as well as the readout of large detector parts. Thisstudy is focused on the use of COTS networking components to reduce the costs and increase theflexibility of such a system. Results from first studies are presented.