# The integrated low-level trigger and readout system of the CERN NA62 experiment

## TL;DR

The paper describes the design, implementation, and performance of a flexible, fully digital low-level trigger and data acquisition system for the CERN NA62 experiment, enabling high-rate data reduction and detector information utilization.

## Contribution

It introduces a novel, fully digital, scalable TDAQ system allowing flexible use of detector data for triggering in a high-rate environment.

## Key findings

- Successful implementation and operation since first years of running.
- High data reduction efficiency achieved.
- System flexibility demonstrated in practical use.

## Abstract

The integrated low-level trigger and data acquisition (TDAQ) system of the NA62 experiment at CERN is described. The requirements of a large and fast data reduction in a high-rate environment for a medium-scale, distributed ensemble of many different sub-detectors led to the concept of a fully digital integrated system with good scaling capabilities. The NA62 TDAQ system is rather unique in allowing full flexibility on this scale, allowing in principle any information available from the detector to be used for triggering. The design concept, implementation and performances from the first years of running are illustrated.