Development of a Central Trigger Processor board for the Advanced SiPM based camera of the CTA Large-Sized Telescopes

TL;DR

This paper discusses the design and initial testing of a digital trigger processor for a new gamma-ray telescope camera, aiming to improve sensitivity and noise discrimination in high-speed data environments.

Contribution

It introduces the conceptual design and prototype evaluation of a novel Central Trigger Processor for advanced SiPM-based telescope cameras.

Findings

Prototype hardware shows promising initial performance.

Digital trigger approach enhances low-energy gamma-ray discrimination.

Design meets strict timing and data rate requirements.

Abstract

We present ongoing work on the Central Trigger Processor board (CTPb), a trigger subsystem for the future advanced SiPM-based Large-Sized Telescope (LST) camera of the Cherenkov Telescope Array Observatory (CTAO). The camera will implement a fully digital trigger, exploiting the increased resolution to improve discrimination of low-energy $\gamma$-ray events from Night Sky Background noise. This approach aims to enhance telescope sensitivity while satisfying strict timing and data rate constraints. We describe the CTPb conceptual design and report initial results from hardware prototypes under evaluation within this next-generation trigger architecture.