Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 66: DAQ, trigger and electronics III

T 66.6: Talk

Wednesday, March 17, 2021, 17:15–17:30, Tp

Demonstrator for ATLAS LAr Phase-II readout chain — •Markus Helbig, Rainer Hentges, and Arno Straessner — Institut für Kern- und Teilchenphysik, TU Dresden, Germany

A demonstrator for the readout chain of the Phase-II upgrade of the ATLAS Liquid Argon Calorimeters is being set up at the TU Dresden. This talk will give an overview of the source part of the setup representing the transmission of data from the detector Front-End Boards to the counting room.

For this purpose, dedicated VHDL firmware for the Xilinx VC707 FPGA Evaluation Kit was implemented to emulate the output of twelve on-detector ADCs of the calorimeters. The raw data are serialized by the lpGBT ASIC (Low Power GigaBit Transceiver) designed by CERN and transmitted to the off-detector backend via optical fiber at 10 Gigabit per second using the CERN Versatile Link PLUS (VL+) module. The two aforementioned components are part of a custom PCB, developed by B. Deng et al. [1] who previously showed the suitability of those components for the ATLAS LAr calorimeter readout. Finally, the backend consists of an Intel Stratix-10 FPGA development kit running parts of the Liquid Argon Signal Processor (LASP) firmware in order to receive and decode the data. Results from data integrity tests and experience with the setup will be presented.

[1] B. Deng et al., Design and hardware evaluation of the optical-link system for the ATLAS Liquid Argon Calorimeter Phase-II Upgrade, Nucl. Instrum. Methods Phys. Res., A 981 (2020) 164495