PoS - Proceedings of Science
Volume 450 - The Eleventh Annual Conference on Large Hadron Collider Physics (LHCP2023) - session Poster session
The new ALICE Fast Interaction Trigger in LHC Run 3
A. Molander*  on behalf of the ALICE collaboration
Full text: pdf
Pre-published on: January 29, 2024
Published on:
On the 5th of July 2022, the Large Hadron Collider (LHC) at CERN, Geneva, started the official data-taking of the current LHC run, Run 3, after a maintenance, upgrade, and commissioning period of about three and a half years. ALICE (A Large Ion Collider Experiment) has undergone many upgrades and improvements, one of which is the new Fast Interaction Trigger (FIT) detector. With its Cherenkov and scintillator arrays, FIT detects particles from proton and heavy-ion collisions in the forward regions of ALICE. It provides low-latency interaction triggers, precise interaction time, luminosity and background monitoring, and determination of multiplicity, centrality and event plane. FIT has performed well in both proton-proton and Pb-Pb collision runs: it shows good collision time and vertex reconstruction; provides a sophisticated interaction trigger menu; and has been giving critical feedback about luminosity and background to the LHC for online beam tuning. The performance of FIT is continuously improving thanks to upgrades to electronics, firmware and software. The installation and commissioning of FIT, its performance during the start of Run 3 and future development and outlook are presented.
DOI: https://doi.org/10.22323/1.450.0268
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