Triplet Track Trigger for Future High Rate Experiments

TL;DR

This paper proposes a triplet pixel layer-based trigger system using Monolithic ActivePixel Sensors for future high-rate collider experiments, enabling fast, efficient, and pure track reconstruction at the first trigger level.

Contribution

It introduces a novel triplet pixel layer design for fast track reconstruction, suitable for high pile-up environments like FCC-hh, demonstrating high efficiency and purity in simulations.

Findings

High track reconstruction efficiency demonstrated

Excellent purity achieved at first trigger level

Performance varies with layer design parameters

Abstract

The hadron-hadron based Future Circular Collider (FCC-hh) is a project with the goal to collide proton-proton beams at a center of mass energy of sqrt(s)=100 TeV with a bunch crossing rate of 25 ns. Some of the major challenges that the FCC-experiments have to tackle are the very large number of pile-up events of around 1000 and the data processing, namely the reduction of the huge data rate of 1-2 PBytes/s whilst keeping the signal efficiencies of interesting processes high. Therefore, smart triggering concepts are needed that not only allow for a significant reduction of pile-up and rate but also provide high signal acceptance and purity. In this proceeding, one such concept of a triplet track trigger based on Monolithic ActivePixel Sensors (MAPS) is presented for a generic detector geometry. It is demonstrated that the triplet pixel layer design allows for a very simple and fast track reconstruction already at the first trigger level, providing excellent track reconstruction efficiencies and very high purity at the same time. Based on a full Geant4 simulation tracking performance studies are presented for a full-scale triplet pixel detector, i.e. three closely spaced pixel layers at a sufficiently large radius, in an FCC-like detector environment. Results obtained for different triplet layer design parameters are compared.