22 research outputs found
Automated workstation for metrological verification of information & control system AZTP-06P
В статье рассматривается автоматизированное рабочее место (АРМ) метрологической поверки информационной управляющей системы АЗТП-06Р в АЭС Козлодуй, созданное на основе продуктов фирмы National Instruments (NI). Представлено аппаратное решение Compact DAQ, на основе которого сделано АРМ. Рассматриваются структура АРМ, аппаратные компоненты, режимы работы программы и рабочие экраны.У статті розглядається автоматизоване робоче місце (АРМ) метрологічної повірки інформаційної системи АЗТП-06Р, що управляє, в АЕС Козлодуй, створене на основі продуктів фірми National Instruments (NI). Представлено апаратне рішення Compact DAQ, на основі якого зроблено АРМ. Розглядаються структура АРМ, апаратні компоненти, режими роботи програми і робочі екрани.The report examined based on the products of National Instruments (NI) automated workstation (ARM) for metrological verification of measuring transducers in NPP Kozloduy. Consider offer of NI hardware product cDAQ, based on which is built ARM. A brief description of the programming language LabView. Consider the structure of the ARM is, the hardware components, modes of operation of the program and working screens
Low- direct-photon production in AuAu collisions at and 62.4 GeV
The measurement of direct photons from AuAu collisions at and 62.4 GeV in the transverse-momentum range Gev/ is presented by the PHENIX collaboration at the Relativistic Heavy Ion Collider. A significant direct-photon yield is observed in both collision systems. A universal scaling is observed when the direct-photon spectra for different center-of-mass energies and for different centrality selections at GeV is scaled with for . This scaling also holds true for direct-photon spectra from AuAu collisions at GeV measured earlier by PHENIX, as well as the spectra from PbPb at GeV published by ALICE. The scaling power seems to be independent of , center of mass energy, and collision centrality. The spectra from different collision energies have a similar shape up to of 2 GeV/. The spectra have a local inverse slope increasing with of GeV/ in the range GeV/ and increasing to GeV/ for GeV/. The observed similarity of low- direct-photon production from to 2760 GeV suggests a common source of direct photons for the different collision energies and event centrality selections, and suggests a comparable space-time evolution of direct-photon emission
Low- direct-photon production in AuAu collisions at and 62.4 GeV
The measurement of direct photons from AuAu collisions at and 62.4 GeV in the transverse-momentum range Gev/ is presented by the PHENIX collaboration at the Relativistic Heavy Ion Collider. A significant direct-photon yield is observed in both collision systems. A universal scaling is observed when the direct-photon spectra for different center-of-mass energies and for different centrality selections at GeV is scaled with for . This scaling also holds true for direct-photon spectra from AuAu collisions at GeV measured earlier by PHENIX, as well as the spectra from PbPb at GeV published by ALICE. The scaling power seems to be independent of , center of mass energy, and collision centrality. The spectra from different collision energies have a similar shape up to of 2 GeV/. The spectra have a local inverse slope increasing with of GeV/ in the range GeV/ and increasing to GeV/ for GeV/. The observed similarity of low- direct-photon production from to 2760 GeV suggests a common source of direct photons for the different collision energies and event centrality selections, and suggests a comparable space-time evolution of direct-photon emission
Low- direct-photon production in AuAu collisions at and 62.4 GeV
The measurement of direct photons from AuAu collisions at and 62.4 GeV in the transverse-momentum range Gev/ is presented by the PHENIX collaboration at the Relativistic Heavy Ion Collider. A significant direct-photon yield is observed in both collision systems. A universal scaling is observed when the direct-photon spectra for different center-of-mass energies and for different centrality selections at GeV is scaled with for . This scaling also holds true for direct-photon spectra from AuAu collisions at GeV measured earlier by PHENIX, as well as the spectra from PbPb at GeV published by ALICE. The scaling power seems to be independent of , center of mass energy, and collision centrality. The spectra from different collision energies have a similar shape up to of 2 GeV/. The spectra have a local inverse slope increasing with of GeV/ in the range GeV/ and increasing to GeV/ for GeV/. The observed similarity of low- direct-photon production from to 2760 GeV suggests a common source of direct photons for the different collision energies and event centrality selections, and suggests a comparable space-time evolution of direct-photon emission
Low- direct-photon production in AuAu collisions at and 62.4 GeV
The measurement of direct photons from AuAu collisions at and 62.4 GeV in the transverse-momentum range Gev/ is presented by the PHENIX collaboration at the Relativistic Heavy Ion Collider. A significant direct-photon yield is observed in both collision systems. A universal scaling is observed when the direct-photon spectra for different center-of-mass energies and for different centrality selections at GeV is scaled with for . This scaling also holds true for direct-photon spectra from AuAu collisions at GeV measured earlier by PHENIX, as well as the spectra from PbPb at GeV published by ALICE. The scaling power seems to be independent of , center of mass energy, and collision centrality. The spectra from different collision energies have a similar shape up to of 2 GeV/. The spectra have a local inverse slope increasing with of GeV/ in the range GeV/ and increasing to GeV/ for GeV/. The observed similarity of low- direct-photon production from to 2760 GeV suggests a common source of direct photons for the different collision energies and event centrality selections, and suggests a comparable space-time evolution of direct-photon emission
Centrality dependence of Lévy-stable two-pion Bose-Einstein correlations in GeV AuAu collisions
International audienceThe PHENIX experiment measured the centrality dependence of two-pion Bose-Einstein correlation functions in ~GeV AuAu collisions at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. The data are well represented by Lévy-stable source distributions. The extracted source parameters are the correlation-strength parameter , the Lévy index of stability , and the Lévy-scale parameter as a function of transverse mass and centrality. The parameter is constant at larger values of , but decreases as decreases. The Lévy scale parameter decreases with and exhibits proportionality to the length scale of the nuclear overlap region. The Lévy exponent is independent of within uncertainties in each investigated centrality bin, but shows a clear centrality dependence. At all centralities, the Lévy exponent is significantly different from that of Gaussian () or Cauchy () source distributions. Comparisons to the predictions of Monte-Carlo simulations of resonance-decay chains show that in all but the most peripheral centrality class (50%-60%), the obtained results are inconsistent with the measurements, unless a significant reduction of the in-medium mass of the meson is included. In each centrality class, the best value of the in-medium mass is compared to the mass of the meson, as well as to several theoretical predictions that consider restoration of symmetry in hot hadronic matter