# Data Acquisition System for the CALICE AHCAL Calorimeter

## TL;DR

This paper presents the design and performance of a scalable data acquisition system for the highly granular AHCAL calorimeter, capable of handling up to 8 million channels for future collider experiments.

## Contribution

It introduces a novel DAQ architecture with multi-stage aggregation and detailed performance analysis for large-scale calorimeter detectors.

## Key findings

- Successful demonstration with a small prototype at DESY testbeams
- Scalable architecture capable of handling millions of channels
- Performance results showing effective data aggregation and system reliability

## Abstract

The data acquisition system (DAQ) for a highly granular analogue hadron calorimeter (AHCAL) for the future International Linear Collider is presented. The developed DAQ chain has several stages of aggregation and scales up to 8 million channels foreseen for the AHCAL detector design. The largest aggregation device, Link Data Aggregator, has 96 HDMI connectors, four Kintex7 FPGAs and a central Zynq System-On-Chip. Architecture and performance results are shown in detail. Experience from DESY testbeams with a small detector prototype consisting of 15 detector layers are shown.