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ABSTRACT: The results of the study of the correlation between dynamic atmospheric phenomena and cosmic ray muon flux variations are
presented. The results of the long-term experiment on continuous measurements of spatioangular variations of the muon flux
using the URAGAN muon hodoscope are considered. It was shown that the correlation between weather phenomena and changes in
the angular distribution of the muon flux on the Earth’s surface are observed in 80% of cases, both in the general counting
rate and in the zenith-azimuthal distribution of the muon flux intensity.
Key wordscosmic ray muons-muon diagnostics-nonstationary atmospheric processes-thunderstorms
Bulletin of the Lebedev Physics Institute 05/2012; 37(6):167-168. · 0.20 Impact Factor
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[hide abstract]
ABSTRACT: The possibilities of using ground-based muon hodoscopes to study heliospheric disturbances are discussed. Mapping of the matrices
of muon flux angular distributions recorded at the ground level in geocentric solar ecliptic coordinates with allowance for
the asymptotic directions of primary protons of galactic cosmic rays makes it possible to observe the dynamics of heliospheric
disturbances in the near-Earth space. Variations in some other characteristics of muon flux angular distributions are also
analyzed.
Bulletin of the Russian Academy of Sciences Physics 04/2012; 73(3):347-349.
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A. N. Dmitrieva,
R. P. Kokoulin,
K. G. Kompaniets,
G. Mannocchi,
A. A. Petrukhin,
O. Saavedra, D. A. Timashkov,
G. Trinchero,
D. V. Chernov,
V. V. Shutenko,
I. I. Yashin
[show abstract]
[hide abstract]
ABSTRACT: Precision measurements of the zenith-angle distributions of muons in the range 61°–89° are performed using the DECOR coordinate
detector. The total number of selected events is more than 20 million. The dependence of the integrated muon intensity on
the zenith angle is determined for several threshold energies in the range from 1.7 to 7.2. GeV. The experimental results
in these ranges of zenith angles and threshold energies are obtained for the first time. It is demonstrated that the dependence
of the integrated muon intensity on the zenith angle is adequately described by a simple analytical relationship.
Bulletin of the Russian Academy of Sciences Physics 04/2012; 71(4):552-555.
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ABSTRACT: A new approach to describing inelastic charged-lepton scattering on a proton is proposed. The approach is based on combining
the results obtained by theoretically studying the limiting cases of this process. The proton structure function is obtained
in an analytic form that involves virtually no free parameters and which is in good agreement with experimental data over
the entire kinematical region.
Physics of Atomic Nuclei 04/2012; 67(12):2216-2226. · 0.57 Impact Factor
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N. S. Barbashina,
R. P. Kokoulin,
K. G. Kompaniets,
G. Mannocchi,
A. A. Petrukhin,
O. Saavedra, D. A. Timashkov,
G. Trinchero,
D. V. Chernov,
V. V. Shutenko,
I. I. Yashin
[show abstract]
[hide abstract]
ABSTRACT: The URAGAN wide-aperture large-area multilayer muon hodoscope is developed for the NEVOD experimental complex of the Moscow
Engineering Physics Institute. The hodoscope will be used to study atmospheric and heliospheric processes responsible for
variations in the muon flux at the Earth’s surface. The structures of the detector and its system of data acquisition and
processing are described. The data obtained during continuous sets of measurements in 2005–2006 using the first two supermodules
of the setup are analyzed, and preliminary results of this analysis are discussed.
PACS numbers92.60.WC–94.80.+g–07.77.-N–07.05.Hd
Instruments and Experimental Techniques 04/2012; 51(2):180-186. · 0.36 Impact Factor
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I. I. Yashin,
N. S. Barbashina,
A. G. Bogdanov,
D. M. Gromushkin,
A. N. Dmitrieva,
V. V. Kindin,
R. P. Kokoulin,
K. G. Kompaniets,
G. Mannocchi,
A. A. Petrukhin,
O. Saavedra, D. A. Timashkov,
G. Trinchero,
D. V. Chernov,
V. V. Shutenko
[show abstract]
[hide abstract]
ABSTRACT: The results of investigation of muon bundles at the Earth’s surface in a wide range of zenith angles on the basis of the new
phenomenological characteristic of extensive air showers—spectra of local muon density—have been investigated. Features of
the local-density spectra are considered within a simple analytical model. The expected distributions of muon density in a
wide range of zenith angles and primary energies, calculated on the basis of the CORSIKA code, are compared with the experimental
data.
Bulletin of the Russian Academy of Sciences Physics 03/2007; 71(4):556-559.
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N. S. Barbashina,
A. G. Bogdanov,
D. V. Chernov,
A. N. Dmitrieva,
D. M. Gromushkin,
V. V. Kindin,
R. P. Kokoulin,
K. G. Kompaniets,
G Mannocchi,
A. A. Petrukhin,
O. Saavedra,
V. V. Shutenko, D. A. Timashkov,
G. Trinchero,
I. I. Yashin
[show abstract]
[hide abstract]
ABSTRACT: A new approach to investigations of ultra-high energy cosmic rays based on the ground-level measurements of the spectra of local density of EAS muons at various zenith angles is considered. Basic features of the local muon density phenomenology are illustrated using a simple semi-analytical model. It is shown that muon density spectra are sensitive to the spectrum slope, primary composition, and to the features of hadronic interaction. New experimental data on muon bundles at zenith angles from 30 degrees to horizon obtained with the coordinate detector DECOR are compared with CORSIKA-based simulations. It is found that measurements of muon density spectra in inclined EAS give possibility to study characteristics of primary cosmic ray flux in a very wide energy range from 10^15 to 10^19 eV.
02/2007;
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N. S. Barbashina,
V. V. Borog,
A. N. Dmitrieva,
R. P. Kokoulin,
K. G. Kompaniets,
G Mannocchi,
A. A. Petrukhin,
D. A. Room,
O. Saavedra,
V. V. Shutenko, D. A. Timashkov,
G. Trinchero,
I. I. Yashin
[show abstract]
[hide abstract]
ABSTRACT: Muon rate variations during Forbush effects registered by means of muon detectors DECOR, TEMP and URAGAN operated in the experimental complex NEVOD (MEPhI, Moscow) have been studied, and comparative analysis with neutron monitor data has been performed. The ratio of values of Forbush decreases in muon and in neutron fluxes is about one third, and preliminary rigidity dependence of Forbush decrease amplitude using muon data has been also obtained (for 2.4 GV cut-off rigidity). The detection of muon flux in the hodoscopic mode allows to study the dynamics of muon flux anisotropy related with magnetic field perturbations. Results of analysis of data from the new unique muon detector URAGAN indicate the change of muon flux asymmetry direction during the Forbush decrease. This phenomenon is related with the motion of solar plasma cloud and hodoscope acceptance cone relative to each other.
02/2007;
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N. S. Barbashina,
R. P. Kokoulin,
K. G. Kompaniets,
G. Mannocchi,
A. A. Petrukhin,
O. Saavedra, D. A. Timashkov,
G. Trinchero,
D. V. Chernov,
V. V. Shutenko,
I. I. Yashin
[show abstract]
[hide abstract]
ABSTRACT: A wide-aperture large-area multilayered muon hodoscope is being constructed above the water Cherenkov calorimeter NEVOD (Moscow
Engineering Physics Institute). This hodoscope is aimed at studying the processes in the Earth’s atmosphere and magnetosphere
that lead to variations in the muon flux at the ground level. The structure of the detector and its data acquisition and triggering
systems are described. Some preliminary results of the analysis of the data obtained using the first two supermodules of the
system in the continuous series of measurements during 2005–2006 are discussed.
Bulletin of the Russian Academy of Sciences Physics 01/2007; 71(7):1044-1046.
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M. B. Amelchakov,
N. S. Barbashina,
A. G. Bogdanov,
D. V. Chernov,
D. M. Gromushkin,
V. V. Kindin,
R. P. Kokoulin,
K. G. Kompaniets,
G. Mannocchi,
O. S. Matveeva,
A. A. Petrukhin,
D. A. Room,
O. Saavedra,
V. V. Shutenko, D. A. Timashkov,
G. Trinchero,
E. E. Yanson,
I. I. Yashin
[show abstract]
[hide abstract]
ABSTRACT: The first experimental results on a new EAS observable, the local muon density spectra measured with a large area coordinate
detector DECOR in a wide range of zenith angles, are presented. These data correspond to the interval of primary particle
energies from 1015 to 1018 eV. Some features of local muon density phenomenology are considered on the basis of an analytical model. Expected distributions
of the events in the muon density have been calculated by means of the CORSIKA code and compared with experimental data.
Physics of Atomic Nuclei 12/2006; 70(1):175-183. · 0.57 Impact Factor
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[hide abstract]
ABSTRACT: Various uncertainties in calculations of inelastic cross section and energy loss are considered. It is shown that widely used kinematic neglects and approximations result in deviations in calculations of these values. The obtained corrections increase with lepton mass, therefore possible consequences for tau-lepton are discussed, too.
12/2006;
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A. N. Dmitrieva,
D. V. Chernov,
R. P. Kokoulin,
K. G. Kompaniets,
G Mannocchi,
A. A. Petrukhin,
O. Saavedra,
V. V. Shutenko, D. A. Timashkov,
G. Trinchero,
I. I. Yashin
[show abstract]
[hide abstract]
ABSTRACT: High-statistics data on near-horizontal muons collected with Russian-Italian coordinate detector DECOR are analyzed. Precise measurements of muon angular distributions in zenith angle interval from 60 to 90 degrees have been performed. In total, more than 20 million muons are selected. Dependences of the absolute integral muon intensity on zenith angle for several threshold energies ranging from 1.7 GeV to 7.2 GeV are derived. Results for this region of zenith angles and threshold energies have been obtained for the first time. The dependence of integral intensity on zenith angle and threshold energy is well fitted by a simple analytical formula. Comment: 4 pages, 4 figures, 1 table
11/2006;
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D. A. Timashkov
[show abstract]
[hide abstract]
ABSTRACT: Main nuclear corrections for inelastic scattering of charged leptons on nuclei, namely shadowing, EMC-effect and Fermi motion have been investigated. Simple formulas describing these effects for different x-regions have been proposed, and unified expression for any transferred energy and momentum as well as for different nuclei has been obtained. Results of calculations of the ratio of nucleus structure function (per nucleon) and free nucleon structure function are in a good agreement with SLAC data.
10/2005;
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[show abstract]
[hide abstract]
ABSTRACT: On the basis of the vector-dominance model and Regge theory, formulas are derived that make it possible to obtain a unified
description of the photoproduction cross section and the nucleon structure functions determining the cross section for inelastic
lepton scattering at low Q
2.
Physics of Atomic Nuclei 12/2002; 66(1):195-202. · 0.57 Impact Factor
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D.A. Timashkov,
Yu.V. Balabin,
N.S. Barbashina,
R.P. Kokoulin,
K.G. Kompaniets,
G. Mannocchi,
A.A. Petrukhin,
O. Saavedra,
V.V. Shutenko,
G. Trinchero,
E.V. Vashenyuk,
I.I. Yashin
[show abstract]
[hide abstract]
ABSTRACT: A wide-aperture hodoscope URAGAN detected a muon rate increase during GLE of December 13, 2006 at six sigma level (for ten-minute bins). Maximum of the enhancement was observed at 03:00 UTC. Capabilities of muon hodoscopes allow obtaining 2D-images of muon flux and for the first time the two-dimensional dynamics of GLE event was measured. Due to the fact that asymptotic view cone of the hodoscope appeared looking along IMF, it was possible to trace in details the evolution of a short-lived and highly collimated relativistic particle bunch in the initial phase of the event.
Astroparticle Physics.
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N S Barbashina,
A N Dmitrieva,
V V Borog,
R P Kokoulin,
K G Kompaniets,
G Mannocchi,
A A Petrukhin,
D A Room,
O Saavedra,
V V Shutenko, D A Timashkov,
G Trinchero,
I I Yashin
[show abstract]
[hide abstract]
ABSTRACT: Muon rate variations during Forbush decreases registered by means of muon detectors DECOR, TEMP and URAGAN operated in the experimental complex NEVOD (MEPhI, Moscow) have been studied. Analysis of data of these setups has been performed using a special technique that reduces as statistical as systematic uncertainties. Preliminary muon energy and zenith-angular dependences of Forbush decrease amplitude have been obtained (for 2.4 GV cut-off rigidity). Analysis of data from the new unique muon hodoscope URAGAN allows to study the dynamics of muon flux anisotropy during Forbush effect.
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D. V. Chernov,
N. S. Barbashina,
G. Mannocchi,
R. P. Kokoulin,
K. G. Kompaniets,
A. A. Petrukhin,
O. Saavedra,
V. V. Shutenko, D. A. Timashkov,
G. Trinchero,
I. I. Yashin
2:457.
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I.I. Yashin,
M.B. Amelchakov,
N.S. Barbashina,
A.G. Bogdanov,
D.V. Chernov,
D.M. Gromushkin,
V.V. Kindin,
R.P. Kokoulin,
K.G. Kompaniets,
G. Mannocchi,
O.S. Matveeva,
A.A. Petrukhin,
D.A. Room,
O. Saavedra,
V.V. Shutenko, D.A. Timashkov,
G. Trinchero
6:373.
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2:377.
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N.S. Barbashina,
A.G. Bogdanov,
D.V. Chernov,
A.N. Dmitrieva,
D.M. Gromushkin,
V.V. Kindin,
R.P. Kokoulin,
K.G. Kompaniets,
G. Mannocchi,
A.A. Petrukhin,
O. Saavedra,
V.V. Shutenko, D.A. Timashkov,
G. Trinchero,
I.I. Yashin
[show abstract]
[hide abstract]
ABSTRACT: A new approach to investigations of ultra-high energy cosmic rays based on the ground-level measurements of the spectra of local density of EAS muons at various zenith angles is considered. Basic features of the local muon density phenomenology are illustrated using a simple semi-analytical model. It is shown that muon density spectra are sensitive to the spectrum slope, primary composition, and to the features of hadronic interaction. New experimental data on muon bundles at zenith angles from 30° to horizon obtained with the coordinate detector DECOR are compared with CORSIKA-based simulations. It is found that measurements of muon density spectra in inclined EAS give possibility to study characteristics of primary cosmic ray flux in a very wide energy range from 1015 to 1019 eV.
Nuclear Physics B - Proceedings Supplements.
