The Darkside-20k Data Acquisition System
Fabio Acerbi, Pushparaj Adhikari, Paolo Agnes, Iftikhar Ahmad, Sebastiano Albergo, Ivone F.M. Albuquerque, Thomas Olling Alexander, Andrew Knight Alton, Pierre-Andre Amaudruz, Gioacchino Alex Anastasi, Michele Angiolilli, Elena Aprile, David J. Auty, Maximo Ave Pernas

TL;DR
The DarkSide-20k experiment employs an advanced, triggerless DAQ system with real-time processing and high efficiency, enabling sensitive dark matter searches with robust data handling.
Contribution
This paper introduces a custom, high-performance DAQ system for DarkSide-20k, featuring continuous digitization, real-time processing, and synchronization across multiple digitizers.
Findings
Quadrant system validated at TRIUMF with stable long-term performance.
System exceeded expected physics rates during stress testing.
Demonstrated high single-photoelectron detection efficiency.
Abstract
DarkSide-20k is a WIMP search experiment using liquid argon as a target, designed to perform a background-free search for dark matter with unprecedented sensitivity, and is currently under construction at INFN Laboratori Nazionali del Gran Sasso, Italy. The detector comprises a dual-phase Time Projection Chamber complemented with external veto systems and is equipped with a total of 2720 SiPM-based readout channels. This work presents the DAQ system designed for DarkSide-20k. The system is capable of continuous, triggerless digitisation of the waveforms with high single-photoelectron detection efficiency and online processing, ensuring data reduction for long-term storage. The DarkSide-20k DAQ system employs commercial CAEN VX2745 digitisers with custom FPGA firmware implementation. Timing and synchronisation across all 48 digitisers are provided by custom Global and Crate Data Manager…
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