Performance of the RPC-based ALICE muon trigger system at the LHC
Open Access
- 1 December 2012
- journal article
- Published by IOP Publishing in Journal of Instrumentation
- Vol. 7 (12), T12002
- https://doi.org/10.1088/1748-0221/7/12/t12002
Abstract
The forward muon spectrometer of ALICE (A Large Ion Collider Experiment) is equipped with a trigger system made of four planes of Resistive Plate Chambers (RPC), arranged in two stations with two planes each, for a total area of about 140 m2. The system provides single and di-muon triggers with suitable transverse momentum selection, optimised for the physics of quarkonia and open heavy flavour. In the first two years of data-taking at the Large Hadron Collider (2010 and 2011) the 72 RPCs were operated in highly saturated avalanche mode in both pp and Pb-Pb collisions. The integrated charge was about 1.3 mC/cm2 on average and 3.5 mC/cm2 for the most exposed detectors. This paper describes two main results. The first result is the determination of the RPC performance, with particular focus on the stability of the main detector parameters such as efficiency, dark current, and dark rate. The second result is the measurement of the muon trigger performance in Pb-Pb collisions at √sNN = 2.76 TeV, in terms of the reliability and stability of the trigger decision logic.This publication has 18 references indexed in Scilit:
- Inclusive production in pp collisions atPhysics Letters B, 2012
- Production of Muons from Heavy Flavor Decays at Forward Rapidity inand Pb-Pb Collisions atPhysical Review Letters, 2012
- Suppression at Forward Rapidity in Pb-Pb Collisions atPhysical Review Letters, 2012
- Polarization inCollisions atPhysical Review Letters, 2012
- Heavy flavour decay muon production at forward rapidity in proton–proton collisions atPhysics Letters B, 2012
- Rapidity and transverse momentum dependence of inclusive J/ψ production in pp collisions atPhysics Letters B, 2011
- The ALICE experiment at the CERN LHCJournal of Instrumentation, 2008
- Lattice simulations of the thermodynamics of strongly interacting elementary particles and the exploration of new phases of matter in relativistic heavy ion collisionsJournal of Physics: Conference Series, 2006
- Spatial resolution of RPC in streamer modeNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2002
- Development of resistive plate countersNuclear Instruments and Methods in Physics Research, 1981