Bibliographies thématiques / Muons horizontaux

Littérature scientifique sur le sujet « Muons horizontaux »

Auteur : Grafiati
Publié le 3 février 2024

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Articles de revues sur le sujet "Muons horizontaux"

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TIMASHKOV, D. A., M. B. AMELCHAKOV, D. V. CHERNOV, V. V. KINDIN, R. P. KOKOULIN, K. G. KOMPANIETS, R. V. KONOPATOV et al. « ALBEDO MUONS : NEW DATA AND CALCULATIONS ». International Journal of Modern Physics A 20, no 29 (20 novembre 2005) : 6977–79. http://dx.doi.org/10.1142/s0217751x0503065x.

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Data on near-horizontal muons obtained with experimental complex NEVOD-DECOR are analyzed. More than 1.5 × 103 atmospheric muons scattered into upper hemisphere with energy above 7 GeV were registered. Calculations show that the main process forming albedo muon flux near horizon is multiple Coulomb scattering.
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MAZZIOTTA, M. N., M. BRIGIDA, C. FAVUZZI, P. FUSCO, F. GARGANO, N. GIGLIETTO, F. GIORDANO, F. LOPARCO, S. RAINÒ et P. SPINELLI. « UNDERGROUND MUON ENERGY SPECTRA WITH THE MACRO TRD ». International Journal of Modern Physics A 20, no 29 (20 novembre 2005) : 6968–70. http://dx.doi.org/10.1142/s0217751x05030624.

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The MACRO detector was located in the Hall B of the Gran Sasso underground Laboratories under an average rock overburden of 3700 hg/cm2. A TRD composed by three identical modules, covering an horizontal area of 36 m2, was added to the MACRO detector in order to measure the residual energy of muons entering MACRO. This kind of measurement provides a useful tool to study the primary cosmic ray energy spectra and composition, their interactions with the Earth's atmosphere and the propagation of muons inside the rock. The results of the measurement of the energy of single and double muons crossing MACRO will be presented. Our data show that double muons are more energetic than single ones in the rock depth range from 3000 to 6500 hg/cm2. Single muon data confirm the reliability of the models adopted to describe the cosmic ray interactions with the atmosphere and the muon propagation inside the rock.
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Athanassas, Constantin D., C. Kitsaki, T. Alexopoulos, V. Gika et S. Maltezos. « Simulation of a muographic analysis of a volcanic dome in Geant4 ». HNPS Proceedings 27 (17 avril 2020) : 37. http://dx.doi.org/10.12681/hnps.2612.

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Here we present a Monte Carlo simulation of a muographic campaign on Methana volcano, Greece. In order to estimate the absorption parameters and the pattern of muon scattering at various incident energies (GeV to TeV), a radar-derived digital terrain model (DTM) was submitted to irradiation by horizontal muons in Geant4 and the penetrating muons were collected by a hypothetical MicroMegas particle detector on the other side of the DTM. Monte Carlo simulation demonstrated that muon energies at least as high as 10 TeV are required for whole-scale radiography of Methana and one has to reduce the scale of study to smaller structures (e.g. ~ 600 m - wide volcanic domes) in order to exploit the more affluent lower energy muons (~ 600 GeV). Coulomb scattering, on the other hand, brings about deflection of muon trajectories away from the detector, resulting in loss of information. Additionally, scattering adds Gaussian blurring to the scanned objects. With the intention of improving contrast and extract objects in muographic image we recommend the use of spatial operators (filters) employed in image analysis.
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Cohu, Amélie, Matias Tramontini, Antoine Chevalier, Jean-Christophe Ianigro et Jacques Marteau. « Atmospheric and Geodesic Controls of Muon Rates : A Numerical Study for Muography Applications ». Instruments 6, no 3 (4 août 2022) : 24. http://dx.doi.org/10.3390/instruments6030024.

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Muon tomography or muography is an innovative imaging technique using atmospheric muons. The technique is based on the detection of muons that have crossed a target and the measurement of their attenuation or deviation induced by the medium. Muon flux models are key ingredients to convert tomographic and calibration data into the 2D or 3D density maps of the target. Ideally, they should take into account all possible types of local effects, from geomagnetism to atmospheric conditions. Two approaches are commonly used: semi-empirical models or Monte Carlo simulations. The latter offers the advantage to tackle down many environmental and experimental parameters and also allows the optimization of the nearly horizontal muons flux, which remains a long-standing problem for many muography applications. The goal of this paper is to identify through a detailed simulation what kind of environmental and experimental effects may affect the muography imaging sensitivity and its monitoring performance. The results have been obtained within the CORSIKA simulation framework, which offers the possibility to tune various parameters. The paper presents the simulation’s configuration and the results obtained for the muon fluxes computed in various conditions.
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GUPTA, NAYANTARA, et D. P. BHATTACHARYYA. « INVESTIGATION ON THE NEUTRINO INDUCED MUONS FROM ACTIVE GALACTIC NUCLEI ». Modern Physics Letters A 15, no 25 (20 août 2000) : 1567–76. http://dx.doi.org/10.1142/s0217732300001742.

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The fluxes of neutrino induced muons at different zenith angles have been calculated using the high energy diffused neutrino spectra emitted from blazars. We have used the standard formulation developed by Gaisser based on charge-current interactions in rock and the QED-based energy loss formulation to estimate the spectra of neutrino induced muons. The energy spectra of neutrino flux generated from blazars has been taken from the model calculations of Protheroe. The latest charge-current and total interaction cross-sections at ultrahigh energies from Kwiecinski et al. have been used to find the probability of muon generation from neutrinos and the loss of neutrinos during propagation through the Earth. We find that our derived horizontal neutrino induced muon energy spectra expected from blazar model of Protheroe is comparable with the upper limits as predicted by SOUDAN 2 experiment.
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Lo Presti, Domenico, Giuseppe Gallo, Danilo Bonanno, Daniele Bongiovanni, Fabio Longhitano et Santo Reito. « Feasibility Study of a New Cherenkov Detector for Improving Volcano Muography ». Sensors 19, no 5 (8 mars 2019) : 1183. http://dx.doi.org/10.3390/s19051183.

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Muography is an expanding technique for internal structure investigation of large volume object, such as pyramids, volcanoes and also underground cavities. It is based on the attenuation of muon flux through the target in a way similar to the attenuation of X-ray flux through the human body for standard radiography. Muon imaging have to face with high background level, especially compared with the tiny near horizontal muon flux. In this paper the authors propose an innovative technique based on the measurement of Cherenkov radiation by Silicon photo-multipliers arrays to be integrated in a standard telescope for muography applications. Its feasibility study was accomplished by means of Geant4 simulations for the measurement of the directionality of cosmic-ray muons. This technique could be particularly useful for the suppression of background noise due to back-scattered particles whose incoming direction is likely to be wrongly reconstructed. The results obtained during the validation study of the technique principle confirm the ability to distinguish the arrival direction of muons with an efficiency higher than 98% above 1 GeV. In addition, a preliminary study on the tracking performance of the presented technique was introduced.
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Zhou, L.-P., Y. Hong, J.-Y. Tang, Y. Yuan, N. Vassilopoulos, Y.-W. Wu et Z.-W. Pan. « Design study for large acceptance muon beamlines by using beam splitting methods ». Journal of Instrumentation 17, no 05 (1 mai 2022) : T05018. http://dx.doi.org/10.1088/1748-0221/17/05/t05018.

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Abstract A muon beamline scheme is designed for the Phase-I of the Experimental Muon Source (EMuS), which is a standalone facility by sharing the proton beam extracted from the Rapid Cycling Synchrotron (RCS) of China Spallation Neutron Source (CSNS). The proton beam for EMuS has a beam power of 20–25 kW and kinetic energy of 1.6 GeV with a low repetition rate of 1.25–2.5 Hz. Different from traditional muon beamline design, a sophisticated beam splitting system using combined spatial and time splitting methods has been developed for the EMuS beamline. In order to profit a graphite target of long effective length, the beamline is designed to have a large horizontal acceptance of 6000π·mm·mrad. A special electrostatic deflector with two channels splits the beam spatially into two branch beamlines, so that the reduced horizontal emittance of the split beams becomes utilizable for applications. Since the muon beam has a time structure of two bunches per pulse that inherits from the proton beam and a single bunch is required for μSR applications, a fast kicker magnet is used to separate two bunches into two endstations. All these make simultaneous muon beams in four endstations that are basically for μSR applications. Surface muons with an intensity order of 105/s and different spot sizes are available for all the four endstations. The contaminated positrons are carefully treated to reduce the background by combining the use of the electrostatic deflector and a dedicated Wien filter.
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Kedar, S., H. K. M. Tanaka, C. J. Naudet, C. E. Jones, J. P. Plaut et F. H. Webb. « Muon radiography for exploration of Mars geology ». Geoscientific Instrumentation, Methods and Data Systems Discussions 2, no 2 (18 octobre 2012) : 829–53. http://dx.doi.org/10.5194/gid-2-829-2012.

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Abstract. Muon radiography is a technique that uses naturally occurring showers of muons (penetrating particles generated by cosmic rays) to image the interior of large scale geological structures in much the same way as standard X-ray radiography is used to image the interior of smaller objects. Recent developments and application of the technique to terrestrial volcanoes have demonstrated that a low-power, passive muon detector can peer deep into geological structures up to several kilometers in size, and provide crisp density profile images of their interior at ten meter scale resolution. Preliminary estimates of muon production on Mars indicate that the near horizontal Martian muon flux, which could be used for muon radiography, is as strong or stronger than that on Earth, making the technique suitable for exploration of numerous high priority geological targets on Mars. The high spatial resolution of muon radiography also makes the technique particularly suited for the discovery and delineation of Martian caverns, the most likely planetary environment for biological activity. As a passive imaging technique, muon radiography uses the perpetually present background cosmic ray radiation as the energy source for probing the interior of structures from the surface of the planet. The passive nature of the measurements provides an opportunity for a low power and low data rate instrument for planetary exploration that could operate as a scientifically valuable primary or secondary instrument in a variety of settings, with minimal impact on the mission's other instruments and operation.
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Kedar, S., H. K. M. Tanaka, C. J. Naudet, C. E. Jones, J. P. Plaut et F. H. Webb. « Muon radiography for exploration of Mars geology ». Geoscientific Instrumentation, Methods and Data Systems 2, no 1 (17 juin 2013) : 157–64. http://dx.doi.org/10.5194/gi-2-157-2013.

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Abstract. Muon radiography is a technique that uses naturally occurring showers of muons (penetrating particles generated by cosmic rays) to image the interior of large-scale geological structures in much the same way as standard X-ray radiography is used to image the interior of smaller objects. Recent developments and application of the technique to terrestrial volcanoes have demonstrated that a low-power, passive muon detector can peer deep into geological structures up to several kilometers in size, and provide crisp density profile images of their interior at ten meter scale resolution. Preliminary estimates of muon production on Mars indicate that the near horizontal Martian muon flux, which could be used for muon radiography, is as strong or stronger than that on Earth, making the technique suitable for exploration of numerous high priority geological targets on Mars. The high spatial resolution of muon radiography also makes the technique particularly suited for the discovery and delineation of Martian caverns, the most likely planetary environment for biological activity. As a passive imaging technique, muon radiography uses the perpetually present background cosmic ray radiation as the energy source for probing the interior of structures from the surface of the planet. The passive nature of the measurements provides an opportunity for a low power and low data rate instrument for planetary exploration that could operate as a scientifically valuable primary or secondary instrument in a variety of settings, with minimal impact on the mission's other instruments and operation.
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Topuz, Ahmet Ilker, Madis Kiisk et Andrea Giammanco. « DOME : Discrete Oriented Muon Emission in GEANT4 Simulations ». Instruments 6, no 3 (15 septembre 2022) : 42. http://dx.doi.org/10.3390/instruments6030042.

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The simulation of muon tomography requires a multi-directional particle source that traverses a number of horizontal detectors of limited angular acceptance that are used to track cosmic-ray muons. In this study, we describe a simple strategy that can use GEANT4 simulations to produce a hemispherical particle source. We initially generate random points on a spherical surface of practical radius by using a Gaussian distributions for the three components of the Cartesian coordinates, thereby obtaining a generating surface for the initial position of the particles to be tracked. Since we do not require the bottom half of the sphere, we take the absolute value of the vertical coordinate, resulting in a hemisphere. Next, we direct the generated particles into the target body by selectively favoring the momentum direction along the vector constructed between a random point on the hemispherical surface and the origin of the target, thereby minimizing particle loss through source biasing. We also discuss a second scheme where the coordinate transformation is performed between the spherical and Cartesian coordinates, and the above-source biasing procedure is applied to orient the generated muons towards the target. Finally, a recipe based on restrictive planes from our previous study is discussed. We implement our strategies by using G4ParticleGun in the GEANT4 code. While we apply these techniques to simulations for muon tomography via scattering, these source schemes can be applied to similar studies for atmospheric sciences, space engineering, and astrophysics where a 3D particle source is a necessity.
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Thèses sur le sujet "Muons horizontaux"

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Yeresko, Mykhailo. « Search for antineutrino disappearance with the SoLi∂ detector : novel reconstruction, calibration and selection ». Electronic Thesis or Diss., Université Clermont Auvergne (2021-...), 2022. http://www.theses.fr/2022UCFAC127.

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Cette thèse présente la recherche d'oscillations d'antineutrinos actifs vers des antineutrinos stériles avec le détecteur SoLi∂. Ce détecteur promeut un concept innovant basé sur un sandwich de plastiques scintillant formé de polyvinyle-toluène composite et de scintillateurs 6LiF:ZnS(Ag). Trois contributions principales à cette recherche sont rapportées dans ce document. La première concerne une nouvelle méthode de reconstruction basée sur l'algorithme ML-EM. Elle vise à transformer la réponse brute du détecteur en une liste de positions (avec des énergies dédiées) où l'interaction physique réelle dans le détecteur a eu lieu. La seconde concerne l'étalonnage en énergie du détecteur. Elle comprend à la fois l'étalonnage relatif au moyen de muons cosmiques horizontaux et l'exploration de plusieurs options pour la détermination de l'échelle d'énergie absolue. Enfin, la thèse présente une nouvelle méthode de sélection des candidats antineutrinos basée sur l'analyse de la partie électromagnétique du signal de désintégration bêta inverse et leur classement en fonction de la géométrie des événements dans le détecteur (topologies). L'analyse a été développée en aveugle et la méthode a été validée avec une petite fraction de l'échantillon de données
This thesis presents the search for active-to-sterile antineutrino oscillations with the SoLi∂ detector, which has an innovative concept based on a sandwich of composite polyvinyl-toluene and 6LiF:ZnS(Ag) scintillators. Three main contributions to this search are reported. The first one describes the new reconstruction method based on the ML-EM algorithm. It is aimed at transformation of the raw detector response to the list of positions (with dedicated energies) where actual physics interaction in the detector took place. The second one describes the energy calibration of the detector. It includes both relative calibration with the cosmic horizontal muons and exploration of several options for the absolute energy scale derivation. Finally, the thesis presents a novel method for selecting antineutrino candidates based on the analysis of the electromagnetic part of the inverse beta decay signal and categorising them according to the geometry of the events in the detector (topologies). The analysis was developed blindly and the method was validated with a small fraction of the data sample
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Chapitres de livres sur le sujet "Muons horizontaux"

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Tomar, Gaurav. « Explaining Muon Magnetic Moment and AMS-02 Positron Excess in a Gauged Horizontal Symmetric Model ». Dans Springer Proceedings in Physics, 427–32. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-25619-1_65.

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Actes de conférences sur le sujet "Muons horizontaux"

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Springer, Wayne Robert, Ahron Barber et Dave Kieda. « Simulation of Near Horizontal Muons and Muon Bundles for the HAWC Observatory with CORSIKA ». Dans 35th International Cosmic Ray Conference. Trieste, Italy : Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.301.0511.

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Springer, Wayne Robert, Anushka Udara Abeysekara, Andrea Albert, Ruben Alfaro, César Alvarez, José Roberto Angeles Camacho, Juan Carlos Arteaga Velazquez et al. « Reconstruction of Nearly-Horizontal Muons in the HAWC Observatory ». Dans 37th International Cosmic Ray Conference. Trieste, Italy : Sissa Medialab, 2021. http://dx.doi.org/10.22323/1.395.0254.

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Springer, Wayne Robert, Ahron Barber et Dave Kieda. « Detection of Near Horizontal Muons with the HAWC Observatory ». Dans 35th International Cosmic Ray Conference. Trieste, Italy : Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.301.0512.

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Barber, Ahron, David Kieda et R. Wayne Springer. « Measurement of the Integral Intensity of Near Horizontal Muons with HAWC ». Dans 36th International Cosmic Ray Conference. Trieste, Italy : Sissa Medialab, 2019. http://dx.doi.org/10.22323/1.358.0187.

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Schwellenbach, David, Wendi Dreesen, J. Andrew Green, Derek Aberle, Aric Tibbitts et Sara Thiemann. « Imaging shielded configurations using near-horizontal and near-vertical trajectory cosmic-ray muons ». Dans 2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC). IEEE, 2014. http://dx.doi.org/10.1109/nssmic.2014.7431086.

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Angeles Camacho, José Roberto, Anushka Udara Abeysekara, Andrea Albert, Ruben Alfaro, César Alvarez, Juan de Dios Álvarez Romero, Juan Carlos Arteaga Velazquez et al. « Horizontal muon track identification with neural networks in HAWC ». Dans 37th International Cosmic Ray Conference. Trieste, Italy : Sissa Medialab, 2021. http://dx.doi.org/10.22323/1.395.1036.

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Subedi, Jeewan, Terry Tope, Ben Hansen, Yi Jia, Jerry Makara, Justin Tillman et Zhijing Tang. « Design of Muon Campus Full Flow Purifier for Varying Operational Conditions and Horizontal Shipping ». Dans Design of Muon Campus Full Flow Purifier for Varying Operational Conditions and Horizontal Shipping. US DOE, 2023. http://dx.doi.org/10.2172/1989893.

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Telnov, Valery. « Limit on a horizontal emittance in high energy muon colliders due to synchrotron radiation ». Dans Studies on colliders and collider physics at the highest energies. AIP, 2000. http://dx.doi.org/10.1063/1.1361689.

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