Front end electronics and first results of the ALICE V0 detector

Zoccarato, Y.; Tromeur, W.; Aguilar, S.; Alfaro, R.; Aviña, E. Almaráz; Anzo, A.; Belmont, E.; Cheshkov, C.; Cheynis, B.; Combaret, C.; Contreras, Ghiordy; Cuautle, E.; Ducroux, L.; Trueba, L. Gonzalez; Grabski, V.; Grossiord, J.‐Y.; Corral, G. Herrera; Martı́nez, Ana; Massacrier, L.; Menchaca‐Rocha, A.; Montaño, Luis Manuel; Paić, G.; Perez, C. Martin; Sandoval, A.; Tieulent, R.; Paolomo, L. Valencia; Vanzetto, S.

doi:10.1016/j.nima.2010.10.025

Cited by 9 publications

(12 citation statements)

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“…For the data acquisition system (DAQ), we used the front end electronics (F EE) developed for the ALICE V0 detector [18]. This system provides useful trigger flags for the coincidence of two signals generated from individual plastic scintillator detectors (TA and TB ).…”

Section: Time Resolution Measurements For Be-be Prototypesmentioning

confidence: 99%

A beam–beam monitoring detector for the MPD experiment at NICA

Alvarado

Ayala

Ayala-Torres³

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

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The Multi-Purpose Detector (MPD) is to be installed at the Nuclotron Ion Collider fAcility (NICA) of the Joint Institute for Nuclear Research (JINR). Its main goal is to study the phase diagram of the strongly interacting matter produced in heavy-ion collisions. These studies, while providing insight into the physics of heavy-ion collisions, are relevant for improving our understanding of the evolution of the early Universe and the formation of neutron stars. In order to extend the MPD trigger capabilities, we propose to include a beam-beam monitoring detector (BE-BE) to provide a level-0 trigger signal with an expected time resolution of 30 ps. This new detector will improve the determination of the reaction plane by the MPD experiment, a key measurement for flow studies that provides physics insight into the early stages of the reaction. In this work, we show the potential of such a detector to help determine the event plane resolution in simulated Au+Au collisions at NICA energies. We also show our results for the time resolution studies of two prototype cells carried out at the T10 CERN facility.

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Section: Time Resolution Measurements For Be-be Prototypesmentioning

confidence: 99%

A beam–beam monitoring detector for the MPD experiment at NICA

Alvarado

Ayala

Ayala-Torres³

et al. 2020

Nuclear Instruments and Methods in Physics Research Section A:

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“…During the test the PMTs were operated at 1500 and 1650 V for ADA and ADC, respectively. The read-out was also identical to the one installed in ALICE [9]; in particular, the signal from the AD modules was split into two signals, one to measure the deposited charge and the other, amplified by ten, to determine the arrival time of the particles.…”

Section: Experimental Set-upmentioning

confidence: 99%

Performance of ALICE AD modules in the CERN PS test beam

Broz

Noris²,

Villar

et al. 2021

J. Inst.

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Two modules of the AD detector have been studied with the test beam at the T10 facility at CERN. The AD detector is made of scintillator pads read out by wave-length shifters (WLS) coupled to clean fibres that carry the produced light to photo-multiplier tubes (PMTs). In ALICE the AD is used to trigger and study the physics of diffractive and ultra-peripheral collisions as well as for a variety of technical tasks like beam-gas background monitoring or as a luminometer.The position dependence of the modules' efficiency has been measured and the effect of hits on the WLS or PMTs has been evaluated. The charge deposited by pions and protons has been measured at different momenta of the test beam. The time resolution is determined as a function of the deposited charge. These results are important ingredients to better understand the AD detector, to benchmark the corresponding simulations, and very importantly they served as a baseline for a similar device, the Forward Diffractive Detector (FDD), being currently built and that will be in operation in ALICE during the LHC Runs 3 and 4.

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“…The V0 detector [75,95,96,97,98] consists of 2 plastic scintillator counters, called V0A and V0C detectors, positioned on each side of the collision vertex (see schematic layout in Figure 5.6). The V0A…”

Section: V0mentioning

confidence: 99%

“…Events with at least one hit simultaneously measured with the V0A and V0C detectors are defined as minimum bias [95]. Since the V0A and V0C detectors are asymmetrically positioned with respect to the interaction point, a delay is applied to the time measured with the V0C detector.…”

Section: Minimum-bias Triggermentioning

confidence: 99%

“…The centrality trigger selects events within a specified centrality class, which is determined by the multiplicity measured with the V0 detector between two thresholds [95,100]. Currently, there are three centrality triggers at ALICE experiment as shown in The semi-central trigger is useful since the rate of events with certain centrality class is increased and, despite of the multiplicity selection, this trigger selects minimum-bias events.…”

Section: Centrality Triggermentioning

confidence: 99%

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Anisotropia azimutal elíptica de elétrons de decaimentos de quarks pesados em colisões de Pb-Pb a SNN = 2.76 TeV medida no experimento ALICE

Godoy¹

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ResumoNessa tese serão apresentadas medidas de anisotropia azimutal elíptica de elétrons de decaimentos de quarks pesados feitas no experimento de colisão de íons pesados ALICE (A Large Ion Collider Experiment, em inglês). As medidas foram obtidas em colisões de Pb-Pb com energia de centro de massa por par de nucleons ( √ s NN ) igual a 2.76 TeV com o colisor de hadrons LHC (Large Hadron Collider, em inglês). Colisões ultrarelativísticas de íons pesados podem alcançar temperaturas e/ou densidades de energia suficientemente altas para formar o Plasma de Quarks e Gluons (QGP, na sigla em inglês), o estado da matéria onde os partons estão desconfinados dos hadrons. O parâmetro de anisotropia azimutal elíptica é um dos observáveis mais importantes utilizados no estudo da formação do QGP. Esse parâmetro é quantificado pelo segundo harmônico, denominado v 2 , da distribuição do ângulo azimutal das partículas em relação ao ângulo do plano de reação, o qual é definido pela direção do parâmetro de impacto e pela direção do feixe de partículas. Medidas de anisotropia azimutal elíptica de quarks pesados (charm e beauty) são interessantes, pois os quarks pesados são sondas sensíveis às propriedades do QGP, visto que eles são predominantemente produzidos em processos iniciais de espalhamento duro e interagem com o meio desconfinado. Medidas de v 2 de elétrons de decaimentos de quarks pesados em baixos valores de momento transversal indicam movimento coletivo de quarks pesados e possível termalização no QGP. Por outro lado, medidas de v 2 de elétrons de decaimentos de quarks pesados em altos valores de momento transversal são interpretadas como uma dependência da geometria do meio por onde os quarks pesados atravessam e perdem energia. Serão mostrados resultados de v 2 de elétrons de decaimentos de quarks pesados em função do momento transversal em colisões de Pb-Pb a √ s NN = 2.76 TeV em eventos com centralidades 20-40% e 30-50%. O resultado é comparado com previsões teóricas e medida obtida em colisões de Au-Au a √ s NN = 0.2 TeV no experimento RHIC. Resultados preliminares de v 2 de elétrons de decaimentos de charm e beauty, separadamente, também serão mostrados em colisões de Pb-Pb a √ s NN = 2.76 TeV em eventos com centralidade 30-50%. i Abstract This thesis presents measurements of the elliptic azimuthal anisotropy of electrons from heavy-flavour decays with the A Large Ion Collider Experiment (ALICE). The measurement is performed for the first time in Pb-Pb collisions at center-of-mass energy per colliding nucleon pair √ s NN = 2.76 TeV at the Large Hadron Collider (LHC).In heavy-ion collisions at ultrarelativistic energies sufficiently high temperature and/or energy density can be achieved to form the Quark-Gluon Plasma (QGP), the state of matter predicted by Quantum Chromodynamics (QCD) in which quarks and gluons are deconfined from hadrons. One of the most important probes of the QGP formation is the elliptic azimuthal anisotropy, which is quantified by the second harmonic v 2 of the particle azimuthal angle distrib...

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Front end electronics and first results of the ALICE V0 detector

Cited by 9 publications

References 0 publications

A beam–beam monitoring detector for the MPD experiment at NICA

A beam–beam monitoring detector for the MPD experiment at NICA

Performance of ALICE AD modules in the CERN PS test beam

Anisotropia azimutal elíptica de elétrons de decaimentos de quarks pesados em colisões de Pb-Pb a SNN = 2.76 TeV medida no experimento ALICE

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