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SUMMARY:Using LHC real-time information for ALICE FT0 Operation during Run
  3
DTSTART;VALUE=DATE-TIME:20261030T091500Z
DTEND;VALUE=DATE-TIME:20261030T093000Z
DTSTAMP;VALUE=DATE-TIME:20261104T222916Z
UID:indico-contribution-6379@cern.ch
DESCRIPTION:Speakers: Mikhail Sukhanov (INR RAS\, MEPhI)\nThe LHC Run 3 co
 ncluded in June 2026. Over nearly four years of operation\, the ALICE expe
 riment [1] collected $\\sim$150 pb$^{-1}$ of $\\text{pp}$ and $\\sim$6.9 n
 b$^{-1}$ of the first $\\text{Pb}{-}\\text{Pb}$ collisions data\, exceedin
 g the cumulative dataset from previous Run 1 and Run 2. This period was al
 so remarkable for the new\nlight-ion program\, featuring the first $\\text
 {Ne}{-}\\text{Ne}$ and $\\text{O}{-}\\text{O}$ collisions at the LHC.\n\nT
 wo of the new ALICE detectors\, Inner Tracking System (ITS) and FT0 – a 
 Cherenkov\ndetector within the Fast Interaction Trigger (FIT) [2] system 
 – have become essential for data taking. Both are widely used for event 
 selection\, particularly based on the vertex position in recent Run 3 anal
 ysis. Moreover\, the FT0 data is a source for multiplicity classification 
 in $\\text{pp}$ collisions and centrality classification in various ion co
 llision systems. In addition\, the FT0 serves as the primary ALICE luminom
 eter in pp collisions and the machine background intensity estimator for t
 he ALICE experiment. These capabilities of the FT0 detector are enabled by
  the high performance of the front-end electronics and its integration wit
 h the FIT Detector Control System (DCS) [3]\, which allows for the correct
 ion of trigger counts based on the LHC filling scheme.\n\nThis talk is dev
 oted to the integration of the LHC interface signals with FT0 DCS. This co
 nnection enabled the Run 3 instantaneous luminosity measurement\, online b
 ackground estimator and other automated algorithms\, ultimately contributi
 ng to the excellent performance of the FT0.\n\n**References**\n\n 1. ALICE
  upgrades during the LHC Long Shutdown 2 / S. Acharya [et al.] // Journal 
 of instrumentation.\n– 2024. – Vol. 19\, no. 05. – P05062. doi: http
 s://doi.org/ 10.1088/1748-0221/19/05/P05062\n 2. Slupecki M. Fast Interact
 ion Trigger for ALICE upgrade //Nuclear Instruments and Methods in Physics
 \nResearch Section A: Accelerators\, Spectrometers\, Detectors and Associa
 ted Equipment. – 2022. – Vol.1039. – P.167021. doi: https://doi.org/
 10.1016/j.nima.2022.167021\n 3. ALICE fast interaction trigger detector co
 ntrol system for the LHC Run 3 // M. Sukhanov [et al.] //\nInternational J
 ournal of Modern Physics E. – 2026. – Vol. 35. – P.2641008. doi: htt
 ps://doi.org/10.1142/S0218301326410089\n\nhttps://indico.particle.mephi.ru
 /event/626/contributions/6379/
LOCATION: Conference Hall 5
URL:https://indico.particle.mephi.ru/event/626/contributions/6379/
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