147 research outputs found
The RPC trigger system of the F/B muon spectrometer at the L3 experiment
No full textThe L3 experiment has recently been upgraded with a Forward-Backward muon spectrometer in view of the LEP 200 physics. Due to their high efficiency and good time resolution, Resistive Plate Counters (RPCs) where chosen for building a system providing the muon trigger in that region. The detector has been successfully built and installed, and the expected performances are confirmed
Sinus Node Sparing Hybrid Thoracoscopic Ablation Outcomes in Patients with Inappropriate Sinus Tachycardia (SUSRUTA-IST) Registry
No full textPerformance of the RPC trigger system of the L3 forward-backward muon spectrometer
No full textIn view of LEP200 physics, the L3 detector has been upgraded installing the Forward-Backward muon spectrometer to increase the angular acceptance in muon detection. We describe the trigger system for this spectrometer which makes use of Resistive Plate Counters (RPC) covering an area of 300 m(2). This system is the first large application in high energy physics of this kind of detectors and its operation will constitute an important test for their future use in the LHC experiments. The main features of the RPCs, the trigger architecture and the preliminary results from the 1994 LEP run are given
The L3 forward-backward muon RPC trigger system
No full textWe describe the trigger system for the Forward-Backward muon spectrometer of L3 detector. The trigger uses double gap Resistive Plate Counters (RPC) covering an area of 300 m(2). This is the first large scale application of this kind of detectors in high energy physics. The main features of these detectors, the trigger architecture and preliminary results are reported
Search for R-Parity Breaking Sneutrino Exchange at LEP
No full textWe report on a search for R--parity breaking effects due to supersymmetric tau--sneutrino exchange in the reactions e+e- to e+e- and e+e- to mu+mu- at centre--of--mass energies from 91~{\GeV} to 172~{\GeV}, using the L3 detector at LEP. No evidence for deviations from the Standard Model expectations of the measured cross sections and forward--backward asymmetries for these reactions is found. Upper limits for the couplings and for sneutrino masses up to m_{\SNT} \leq 190~\GeV are determined from an analysis of the expected effects due to tau sneutrino exchange
RPC-based Muon Identification System for the neutrino detector of the SHiP experiment
No full textThe SHiP experiment has been proposed at CERN to shed light on phenomena still unexplained in the framework of the Standard Model, such as the nature of dark matter, the baryonic asymmetry of the Universe and the neutrino oscillations, searching for hints of New Physics. A section of the detector will be dedicated to the study of neutrino physics with special emphasis on tau neutrino properties, still very poorly measured. A system to identify the muons produced in neutrino interactions, based on RPC technology, has been proposed and it is presented in detail in this paper
The Level-1 Trigger Muon Barrel System of the ATLAS experiment at CERN
No full textThe ATLAS Level-1 Muon Barrel Trigger is one of the main elements of the first stage of event selection of the ATLAS experiment at the Large Hadron Collider. The challenge of the Level-1 system is a reduction of the event rate from a collision rate of by a factor , using simple algorithms that can be executed in highly parallel custom electronics with a latency of order of . The input stage of the Level-1 Muon consists of an array of processors receiving the full granularity of data from a dedicated detector (Resistive Plate Chambers in the Barrel). This first stage of the algorithm is performed directly on-detector, while the final stage is performed on boards mounted in the counting room, by the so-called off-detector electronics. The trigger algorithm is executed within a fixed latency, its real-time output are the multiplicity of muon candidates passing a set of programmable thresholds, and their topological information. The detector system and the trigger electronics are designed to achieve a safe bunch-crossing identification. In order to optimize design effort and cost, the trigger system integrates also the readout of the detector, with its own requirements on time resolution and overall data bandwidth. We present the detailed functional requirements of the Level-1 Muon Barrel system, its architecture, implementation and construction
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