scholarly journals Atmospheric effects of the cosmic-ray mu-meson component

2018 ◽  
Vol 4 (3) ◽  
pp. 95-102
Author(s):  
Валерий Янчуковский ◽  
Valery Yanchukovsky ◽  
Василий Кузьменко ◽  
Vasiliy Kuzmenko
Keyword(s):  
Experimental Data ◽  
Factor Analysis ◽  
Theoretical Calculations ◽  
Cosmic Ray ◽  
Atmospheric Effects ◽  
Atmospheric Component ◽  
Coeffi Cients ◽  
Significant Temperature ◽  
Muon Intensity ◽  
Barometric Effect

Variations in the intensity of cosmic rays observed in the depth of the atmosphere include the atmospheric component of the variations. Cosmic-ray muon telescopes, along with the barometric effect, have a significant temperature effect due to the instability of detected particles. To take into account atmospheric effects in muon telescope data, meteorological coeffi-cients of muon intensity are found. The meteorological coefficients of the intensity of muons recorded in the depth of the atmosphere are estimated from experi-mental data, using various methods of factor analysis. The results obtained from experimental data are com-pared with the results of theoretical calculations.

scholarly journals Atmospheric effects of the cosmic-ray mu-meson component

2018 ◽  
Vol 4 (3) ◽  
pp. 76-82 ◽  
Author(s):  
Валерий Янчуковский ◽  
Valery Yanchukovsky ◽  
Василий Кузьменко ◽  
Vasiliy Kuzmenko
Keyword(s):  
Experimental Data ◽  
Factor Analysis ◽  
Cosmic Rays ◽  
Theoretical Calculations ◽  
Cosmic Ray ◽  
Atmospheric Effects ◽  
Atmospheric Component ◽  
Significant Temperature ◽  
Muon Intensity ◽  
Barometric Effect

Variations in the intensity of cosmic rays observed in the depth of the atmosphere include the atmospheric component of the variations. Cosmic-ray muon telescopes, along with the barometric effect, have a significant temperature effect due to the instability of detected particles. To take into account atmospheric effects in muon telescope data, meteorological coefficients of muon intensity are found. The meteorological coefficients of the intensity of muons recorded in the depth of the atmosphere are estimated from experimental data, using various methods of factor analysis. The results obtained from experimental data are compared with the results of theoretical calculations.

Theoretical studies of in‐situ rock density determinations using underground cosmic‐ray muon intensity measurements with application in mining geophysics

Geophysics ◽  
1979 ◽  
Vol 44 (9) ◽  
pp. 1549-1569 ◽  
Author(s):  
L. Malmqvist ◽  
G. Jönsson ◽  
K. Kristiansson ◽  
L. Jacobsson
Keyword(s):  
Theoretical Calculations ◽  
Scintillation Counter ◽  
Cosmic Ray ◽  
Massive Sulfide ◽  
Rock Density ◽  
Density Anomaly ◽  
Intensity Measurements ◽  
Muon Intensity ◽  
Change In Mean

The feasibility of in‐situ rock density determinations by means of subsurface cosmic‐ray muon intensity measurements is based on theoretical calculations for two hypothetical scintillation counter telescopes: one is intended for registration in a gallery and the other is intended for use in narrow boreholes. It is shown that it is possible to measure the mean density of the rock traversed by the muons by measuring the muon intensity. The sensitivity of the method is favorable—a 1 percent change in mean rock density corresponds to a change of about 3 percent in the counting rate. A possible use of cosmic‐ray muon technique is the localization of an anomalous density distribution in overlying rock. A characteristic minimum registration time to detect a certain density anomaly varies from a few hours to about 10 days, depending on the geologic situation and the depth and design of the detector. The device is found to be most applicable for massive sulfide and iron exploration. This tecnique provides some new possibilities. A certain spatial resolution can be achieved at the expense of the registration time, and the overlying rock can, to some extent, be investigated in different directions from one point of observation. The method seems to be useful down to depths of approximately 600 m for the gallery application and 400 m for the borehole application. However, these limits are a consequence of the size of the detector, the size and density contrast of the target, and the maximum registration time accepted for each observation.

scholarly journals High energy cosmic ray interactions and UHECR composition problem

2019 ◽  
Vol 210 ◽  
pp. 02001
Author(s):  
Sergey Ostapchenko
Keyword(s):  
Experimental Data ◽  
Monte Carlo ◽  
Cosmic Rays ◽  
Cosmic Ray ◽  
High Energy ◽  
Ultra High Energy ◽  
Hadronic Interactions ◽  
High Energy Cosmic Rays ◽  
Cosmic Ray Interactions ◽  
Composition Problem

The differences between contemporary Monte Carlo generators of high energy hadronic interactions are discussed and their impact on the interpretation of experimental data on ultra-high energy cosmic rays (UHECRs) is studied. Key directions for further model improvements are outlined. The prospect for a coherent interpretation of the data in terms of the UHECR composition is investigated.

Cross sections for d-3H neutron interactions with samarium isotopes

2016 ◽  
Vol 104 (8) ◽  
Author(s):  
Junhua Luo ◽  
Chunlei Wu ◽  
Li Jiang ◽  
Long He
Keyword(s):  
Experimental Data ◽  
Neutron Flux ◽  
Cross Sections ◽  
Theoretical Calculations ◽  
Nuclear Model ◽  
Activation Technique ◽  
Incident Neutron ◽  
Reaction Threshold ◽  
Talys 1.6 ◽  
The Cross

Abstract:The cross sections for (n,x) reactions on samarium isotopes were measured at (d-T) neutron energies of 13.5 and 14.8 MeV with the activation technique. Samples were activated along with Nb and Al monitor foils to determine the incident neutron flux. Theoretical calculations of excitation functions were performed using the nuclear model codes TALYS-1.6 and EMPIRE-3.2 Malta with default parameters, at neutron energies varying from the reaction threshold to 20 MeV. The results were discussed and compared with experimental data found in the literature. At neutron energies 13.5 and 14.8 MeV, the cross sections of the

Pseudopotential calculations of elastic scattering of electrons by helium atoms in the range 0–20 eV

1990 ◽  
Vol 68 (1) ◽  
pp. 104-110 ◽  
Author(s):  
B. Plenkiewicz ◽  
P. Plenkiewicz ◽  
J.-P. Jay-Gerin
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Momentum Transfer ◽  
Cross Sections ◽  
Theoretical Calculations ◽  
Incident Electron ◽  
Elastic Electron ◽  
Scattering System ◽  
Helium Atoms ◽  
Pseudopotential Calculations

Our earlier pseudopotential calculations on electrons colliding with argon and krypton are extended to consider the elastic electron–helium scattering system. In this paper, we present detailed results for phase shifts, differential, total, and momentum-transfer cross sections for this system for incident electron energies in the range from 0 to 20 eV. These agree very well with existing experimental data and with other theoretical calculations.

A Comparison of Analytical Predictions With Experimental Measurements of Transmission Error of Misaligned Loaded Gears

1992 ◽  
Author(s):  
Harsh Vinayak ◽  
Donald R. Houser
Keyword(s):  
Experimental Data ◽  
Load Distribution ◽  
Theoretical Calculations ◽  
Data Acquisition System ◽  
Transmission Error ◽  
Test Facility ◽  
Experimental Measurements ◽  
Gear Pair ◽  
Prediction Program ◽  
Dynamic Transmission Error

Abstract This paper deals with the experimental study of dynamic transmission error of a gear pair. Two aspects of the experiment are discussed : 1) design of the test facility and data acquisition system and 2) comparison of transmission error and load distribution with experimental data. Several gears were tested under varying misalignments. A prediction program LDP (Load distribution Program) was used for theoretical calculations of dynamic transmission error.

Development of designing and implementation method of magnetic execution unit of downhole valve for the bottomhole assembly

2020 ◽  
pp. 38-44
Author(s):  
I.Y. Shirali ◽  
◽  
V.Yu. Tsivilitsin ◽  
İ.B. Bondar ◽  
R.A. Hasanov ◽  
...  
Keyword(s):  
Experimental Data ◽  
Theoretical Calculations ◽  
Calculation Methods ◽  
Well Drilling ◽  
Power Characteristics ◽  
Drilling Tools ◽  
Execution Unit ◽  
Implementation Method ◽  
Oil Gas ◽  
Gas Bearing

The structure of two types of magnetic valve is offered and the calculation methods of their pull-in force developed as well. The formulas of calculation of pull-in force in the main area of valves’ power characteristics are obtained. Experimental data are in alignment with theoretical calculations. Power characteristics of offered structures of magnetic valves may be changed in terms of the offered structural execution of magnetic valves. Experimental test of obtained formulas has been carried out. The ways of changing the power characteristics of magnetic valves in accordance with the requirements of certain applications are presented. The structures of magnetic reversing valves for drilling tools used in well drilling in various oil-gas bearing areas of SOCAR have been developed.

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