Work

High-throughput packet aggregator for the back-end DAQ of CERN CMS HGCAL detector

Year: 2025

Type: conference-paper

Abstract: The Phase 2 upgrade of CERN LHC accelerator requires the CMS detector to replace its endcap calorimeters with the new HGCAL. Each of the 96 back-end DAQ FPGAs will process LHC collision data from 108 input optical fibre pairs operating at 10 Gb/s and will have to route the aggregated data into 12 output optical fibre pairs operating at 24 Gb/s. This paper proposes an architecture of a multi-FIFO readout system, to be integrated into the highly space-constrained FPGA design of the back-end DAQ system of the HGCAL. This readout solution aggregates and conveys the processed data to the system’s outputs and minimises the detector dead time by load-balancing the data distribution between sources and destinations. Experimental results demonstrate that the proposed circuit is able to cope with the final detector’s bandwidth and configuration requirements, as well as several test systems needed for the assembly and commissioning of the detector.

Source: IEEE International Symposium on Circuits and Systems proceedings

DOI: 10.1109/iscas56072.2025.11044120

Authors: Martim Rosado, Pedro Tomás, Nuno Roma, André David

Institutions: European Organization for Nuclear Research, Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento, University of Lisbon

Language: English

Topic: Particle Detector Development and Performance

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: green

Funders: CERN, Fundação para a Ciência e a Tecnologia