The Experts below are selected from a list of 177093 Experts worldwide ranked by ideXlab platform
S Eidelman - One of the best experts on this subject based on the ideXlab platform.
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a new approach for measuring the Muon anomalous magnetic moment and electric dipole moment
Progress of Theoretical and Experimental Physics, 2019Co-Authors: M Abe, Moses Chung, S Bae, H Choi, G Beer, G Bunce, Seonho Choi, W Da Silva, S EidelmanAbstract:This paper introduces a new approach to measure the Muon magnetic moment anomaly |$a_{\mu} = (g-2)/2$| and the Muon electric dipole moment (EDM) |$d_{\mu}$| at the J-PARC Muon facility. The goal of our experiment is to measure |$a_{\mu}$| and |$d_{\mu}$| using an independent method with a factor of 10 lower Muon momentum, and a factor of 20 smaller diameter storage-ring solenoid compared with previous and ongoing Muon |$g-2$| experiments with unprecedented quality of the storage magnetic field. Additional significant differences from the present experimental method include a factor of 1000 smaller transverse emittance of the Muon beam (reaccelerated thermal Muon beam), its efficient vertical injection into the solenoid, and tracking each decay positron from Muon decay to obtain its momentum vector. The precision goal for |$a_{\mu}$| is a statistical uncertainty of 450 parts per billion (ppb), similar to the present experimental uncertainty, and a systematic uncertainty less than 70 ppb. The goal for EDM is a sensitivity of |$1.5\times 10^{-21}~e\cdot\mbox{cm}$|.
V Blackmore - One of the best experts on this subject based on the ideXlab platform.
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first particle by particle measurement of emittance in the Muon ionization cooling experiment
European Physical Journal C, 2019Co-Authors: D Adams, D Adey, R Asfandiyarov, G Barber, A De Bari, R Bayes, V Bayliss, R Bertoni, V BlackmoreAbstract:The Muon Ionization Cooling Experiment (MICE) collaboration seeks to demonstrate the feasibility of ionization cooling, the technique by which it is proposed to cool the Muon beam at a future neutrino factory or Muon collider. The emittance is measured from an ensemble of Muons assembled from those that pass through the experiment. A pure Muon ensemble is selected using a particle-identification system that can reject efficiently both pions and electrons. The position and momentum of each Muon are measured using a high-precision scintillating-fibre tracker in a 4 T solenoidal magnetic field. This paper presents the techniques used to reconstruct the phase-space distributions in the upstream tracking detector and reports the first particle-by-particle measurement of the emittance of the MICE Muon Beam as a function of Muon-beam momentum.
Li Heng - One of the best experts on this subject based on the ideXlab platform.
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Performance of the ATLAS RPC detector and Level-1 Muon barrel trigger at $\sqrt{s}$ = 13 TeV
2020Co-Authors: Li HengAbstract:The ATLAS experiment at the Large Hadron Collider utilises a trigger system consisting of a first level (Level-1) trigger based on custom hardware and a higher level trigger based on computer farms. The Level-1 Muon trigger system selects Muon candidates with six thresholds of transverse momenta and associate them with correct LHC bunch crossings. The Level-1 Muon Barrel Trigger uses Resistive Plate Chambers (RPC) detectors to form trigger decisions by identifying Muon candidates with $|\eta |
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Performance of the ATLAS RPC detector and Level-1 Muon barrel trigger at $\sqrt{s}$ = 13 TeV
2020Co-Authors: Li HengAbstract:The ATLAS experiment at the Large Hadron Collider utilises a trigger system consisting of a first level hardware trigger and a higher level software trigger. The Level-1 Muon trigger system selects Muon candidates with six transverse momentum thresholds and associate them with a correct LHC bunch crossing. The Level-1 Muon Barrel Trigger uses Resistive Plate Chambers (RPC) detectors to generate trigger signals for selecting Muon candidates within the pseudorapidity range of up to 1.05. The RPC detectors are arranged in three concentric double layers and consist of 3700 gas volumes, with a total surface of more than 4000 square meters, that operate in a toroidal magnetic field. This contribution will discuss the performance of the RPC detector system and of the Level-1 Muon Barrel trigger during the 2018 data taking period. Measurements of the RPC detector response and time resolution, obtained using Muon candidates produced in LHC collisions, will be presented. Trigger performance and efficiency measurements that are obtained using Z boson decays to a Muon pair will be also discussed. Finally, studies of the RPC detector response at different high voltage and threshold settings will be presented, in the context of expected detector response after the High Luminosity LHC upgrades
T. Hiraki - One of the best experts on this subject based on the ideXlab platform.
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Measurement of the Muon beam direction and Muon flux for the T2K neutrino experiment
Progress of Theoretical and Experimental Physics, 2015Co-Authors: Kazuhiro Suzuki, Shigeki Aoki, Akitaka Ariga, Tomoko Ariga, C. Bronner, Antonio Ereditato, M. Friend, M. Hartz, T. HirakiAbstract:The Tokai-to-Kamioka (T2K) neutrino experiment measures neutrino oscillations by using an almost pure Muon neutrino beam produced at the J-PARC accelerator facility. The T2K Muon monitor was installed to measure the direction and stability of the Muon beam which is produced together with the Muon neutrino beam. The systematic error in the Muon beam direction measurement was estimated, using data and MC simulation, to be 0.28 mrad. During beam operation, the proton beam has been controlled using measurements from the Muon monitor and the direction of the neutrino beam has been tuned to within 0.3 mrad with respect to the designed beam-axis. In order to understand the Muon beam properties, measurement of the absolute Muon yield at the Muon monitor was conducted with an emulsion detector. The number of Muon tracks was measured to be (4.06 ± 0.05) × 10⁴ cm⁻² normalized with 4 × 10¹¹protons on target with 250 kA horn operation. The result is in agreement with the prediction which is corrected based on hadron production data.
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measurement of the Muon beam direction and Muon flux for the t2k neutrino experiment
arXiv: Instrumentation and Detectors, 2014Co-Authors: Kazuhiro Suzuki, Shigeki Aoki, Akitaka Ariga, Tomoko Ariga, C. Bronner, Antonio Ereditato, M. Friend, M. Hartz, F Bay, T. HirakiAbstract:The Tokai-to-Kamioka (T2K) neutrino experiment measures neutrino oscillations by using an almost pure Muon neutrino beam produced at the J-PARC accelerator facility. The T2K Muon monitor was installed to measure the direction and stability of the Muon beam which is produced together with the Muon neutrino beam. The systematic error in the Muon beam direction measurement was estimated, using data and MC simulation, to be 0.28 mrad. During beam operation, the proton beam has been controlled using measurements from the Muon monitor and the direction of the neutrino beam has been tuned to within 0.3 mrad with respect to the designed beam-axis. In order to understand the Muon beam properties,measurement of the absolute Muon yield at the Muon monitor was conducted with an emulsion detector. The number of Muon tracks was measured to be $(4.06\pm0.05)\times10^4$ cm$^{-2}$ normalized with $4\times10^{11}$ protons on target with 250 kA horn operation. The result is in agreement with the prediction which is corrected based on hadron production data.
D Adey - One of the best experts on this subject based on the ideXlab platform.
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first particle by particle measurement of emittance in the Muon ionization cooling experiment
European Physical Journal C, 2019Co-Authors: D Adams, D Adey, R Asfandiyarov, G Barber, A De Bari, R Bayes, V Bayliss, R Bertoni, V BlackmoreAbstract:The Muon Ionization Cooling Experiment (MICE) collaboration seeks to demonstrate the feasibility of ionization cooling, the technique by which it is proposed to cool the Muon beam at a future neutrino factory or Muon collider. The emittance is measured from an ensemble of Muons assembled from those that pass through the experiment. A pure Muon ensemble is selected using a particle-identification system that can reject efficiently both pions and electrons. The position and momentum of each Muon are measured using a high-precision scintillating-fibre tracker in a 4 T solenoidal magnetic field. This paper presents the techniques used to reconstruct the phase-space distributions in the upstream tracking detector and reports the first particle-by-particle measurement of the emittance of the MICE Muon Beam as a function of Muon-beam momentum.
