Year: 2024
Type: conference-paper
Abstract: The ALICE apparatus at CERN has undergone significant upgrade during the LHC’s Long Shutdown 2 to increase the experiment’s rate capability and measurement precision for Run 3 and Run 4. One of the key detectors newly introduced to the experiment is the Fast Interaction Trigger (FIT). Featuring minimal dead time, FIT provides a comprehensive trigger menu, including the minimum bias trigger with an efficiency exceeding 90% in proton-proton collisions. It also provides centrality, event plane and background measurement capabilities. Precision of the collision time measurements performed by FIT reached remarkable values of σ = 17 ps in proton-proton collisions and σ = 4.4 ps in Pb-Pb collisions. This paper details FIT’s design, performance, and the technical novelties made to meet the stringent environmental requirements of ALICE.
DOI: 10.22323/1.476.0921
Author: Yury Melikyan
Institution: Helsinki Institute of Physics
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4405595919