Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 11: Silicon trackers 1

T 11.2: Talk

Monday, March 4, 2024, 16:15–16:30, Geb. 30.22: kl. HS B

ATLAS ITk-Pixel DAQ system — •Wael Alkakhi, Joern Große-Knetter, Arnulf Quadt, and Ali Ali — II. Physikalisches Institut, Georg-August-Universität Göttingen

During the ATLAS HL-LHC upgrade, the current inner detector is going to be replaced by an all-silicon Inner Tracker (ITk). The ITk-Pixel DAQ system basic read-out chain includes the YARR software, communicating with the FELIX PCIe board acting as an interface connected through lpGBT transceivers to the on-detector front-end (FE) chips ITkPix. The FEs are grouped in quad modules that are installed on local supports, which are integral parts of the ITk structure. Depending on the specific configuration, each loaded local support (LLS) accommodates between 16 and 28 quad modules for local inclined half rings or 36 quad modules for local longerons. The communication between YARR and FELIX was already validated using NetIO/Felixcore networking interfacing SW module. Nevertheless, the final DAQ system adopts the next generation communication interface called Felixclient (NetIO-Next/Felixstar). Further development was consequently required to validate the new read-out chain achieved first on a lab setup with a couple of ITkPix single chip cards and quad modules. However, as the final ITk-Pixel read-out system will contain about 10000 quad modules, a more representative sub-system on a real LLS should be used. Such a read-out setup can be based on 16 ITkPix quad modules on a real local support from previous serial powering tests and used to validate the YARR software.