scholarly journals Temperature Effects on Cosmic Ray muons Observed by Multiwire Detector at High Cutoff Rigidity Station

2019 ◽  
Author(s):  
Abdullrahman Maghrabi ◽  
Abdulah Aldosari ◽  
Mohammed Almutairi ◽  
Mohammed Altilasi ◽  
Abdulah Alshehri ◽  
...  
Keyword(s):  
Temperature Effects ◽  
Cosmic Ray ◽  
Cutoff Rigidity

Characteristics of Cosmic Ray Diurnal Variation from Deep River Neutron and Meson Data and Temperature Effects

1972 ◽  
Vol 50 (12) ◽  
pp. 1323-1331 ◽  
Author(s):  
S. P. Agrawal ◽  
A. G. Ananth ◽  
U. R. Rao
Keyword(s):  
Solar Cycle ◽  
Diurnal Variation ◽  
Temperature Effects ◽  
Cosmic Ray ◽  
Cutoff Rigidity ◽  
Neutron Data ◽  
Neutron Monitors ◽  
Temperature Coefficients ◽  
Extensive Analysis ◽  
Yield Values

From an extensive analysis of Deep River meson data for over 5 years, new temperature coefficients have been derived for correcting the meson data. It is shown that meson data corrected using new coefficients yield values of diurnal and semidiurnal anisotropy consistent with those obtained from neutron monitors. Using the temperature-corrected meson and neutron data, the upper cutoff rigidity beyond which the diurnal variation ceases is shown to vary with solar cycle showing a minimum of about 35 GV during the Quiet Solar Year of 1965, and a maximum of ≈ 125 GV during 1968–1969.

The results of simultaneous measurements of the cosmic-ray intensity over the Antarctic and Arctic

1968 ◽  
Vol 46 (10) ◽  
pp. S823-S824
Author(s):  
S. N. Vernov ◽  
A. N. Charakhchyan ◽  
T. N. Charakhchyan ◽  
Yu. J. Stozhkov
Keyword(s):  
Cosmic Rays ◽  
Temperature Effects ◽  
Cosmic Ray ◽  
Primary Component ◽  
Low Energy ◽  
Cosmic Ray Intensity ◽  
Simultaneous Measurements ◽  
Murmansk Region ◽  
The Antarctic

The results of the analysis of data obtained from measurements carried out by means of regular stratospheric launchings of cosmic-ray radiosondes over the Murmansk region and the Antarctic observatory in Mirny in 1963–66 are presented. The problem of the anisotropy of the primary component of low-energy cosmic rays and of temperature effects on the cosmic-ray intensity in the atmosphere are discussed.

Dynamics of Cosmic-Ray Cutoff Rigidity and Magnetospheric Parameters during Different Phases of the Storm of November 20, 2003

2021 ◽  
Vol 61 (2) ◽  
pp. 169-179
Author(s):  
N. G. Ptitsyna ◽  
O. A. Danilova ◽  
M. I. Tyasto ◽  
V. E. Sdobnov
Keyword(s):  
Cosmic Ray ◽  
Cutoff Rigidity

Cosmic Ray Measurements between Australia and Japan

1949 ◽  
Vol 2 (4) ◽  
pp. 493
Author(s):  
PG Law ◽  
CD McKenzie ◽  
HD Rathgeber
Keyword(s):  
Standard Deviation ◽  
Temperature Effects ◽  
Cosmic Ray ◽  
Barometric Pressure ◽  
Temporary Increase ◽  
Wide Angle ◽  
Latitude Effect ◽  
The Difference ◽  
Barometric Effect ◽  
Diurnal Period

Cosmic ray results obtained on a journey to and fro between Australia and Japan are described. The apparatus was that used previously on the H.M.A.S. Wyatt Earp(l), but since modified, and extended to record showers. A latitude effect of 20 per cent. was found for rays of vertical incidence. The difference between electron and meson components did not exceed the statistical errors of 2 per cent. For wide angle coincidence telescope measurements the latitude effect reduces to 13 per cent. Further it has been found that a latitude effect of some 10 per cent. exists for extensive showers of an average spread of 1 metre. An observed latitude effect of penetrating extensive showers falls, however, within the standard deviation of the measurements. The above results were not corrected for barometric and temperature effects nor for variations in height of the meson-producing layer. Evidence is presented of the existence of a semi-diurnal variation at the equator and at Kure of opposite phase to the barometric pressure variations and of about twice the coefficient of the normal barometric effect. The maximum of the diurnal period occurs at Kure at 2 hours local time and at the equator at 19 hours. A temporary increase of between 2 and 3 per cent. in cosmic rag intensity during the period July 29-31, 1948, is noted.

A five degree by fifteen degree world grid of trajectory-determined vertical cutoff rigidities

1968 ◽  
Vol 46 (10) ◽  
pp. S1098-S1101 ◽  
Author(s):  
M. A. Shea ◽  
D. F. Smart ◽  
John R. McCall
Keyword(s):  
Geomagnetic Field ◽  
Cosmic Ray ◽  
Smooth Curve ◽  
Order Effects ◽  
Intensity Data ◽  
Cutoff Rigidity ◽  
Threshold Values ◽  
Small Deviations ◽  
Cosmic Ray Intensity ◽  
Penumbral Region

Vertical cutoff rigidities have been calculated for a world grid 5 degrees in latitude and 15 degrees in longitude using the Finch and Leaton sixth-degree simulation of the quiescent geomagnetic field. These calculations utilized the trajectory-tracing procedure at intervals of 0.01 BV throughout the penumbral region to determine an "effective" vertical cutoff rigidity defined by Shea et al. (1965). When experimental cosmic-ray intensity data are plotted using threshold rigidities derived from this grid, greater coherence of these data is found than is obtained using previously published threshold values. However, small deviations from an intuitively pleasing smooth curve indicate we may have reached a limitation in the usefulness of vertical cutoff rigidities, and perhaps second-order effects should be included when using cutoff rigidity as a parameter in the analysis of very precise cosmic-radiation intensity data.

scholarly journals Geomagnetic effects on cosmic ray propagation for different conditions

2011 ◽  
Vol 7 (S286) ◽  
pp. 234-237
Author(s):  
Jimmy J. Masías-Meza ◽  
Xavier Bertou ◽  
Sergio Dasso
Keyword(s):  
Numerical Simulations ◽  
Geomagnetic Activity ◽  
Geomagnetic Field ◽  
Cosmic Ray ◽  
Cutoff Rigidity ◽  
Lower Cutoff

AbstractThe geomagnetic field (Bgeo) sets a lower cutoff rigidity (Rc) to the entry of cosmic particles to Earth which depends on the geomagnetic activity. From numerical simulations of the trajectory of a proton (performed with the MAGCOS code) in the Bgeo, we use backtracking to analyze particles arriving at the Auger Observatory location. We determine the asymptotic trajectories and the values of Rc in different incidence directions. Simulations were done using several models of Bgeo that emulate different geomagnetic conditions.

Variations of geomagnetic thresholds of cosmic rays and magnetospheric parameters during different phases  of the storm of November 20, 2003

2021 ◽  
Author(s):  
Elena Vernova ◽  
Natalia Ptitsyna ◽  
Olga Danilova ◽  
Marta Tyasto
Keyword(s):  
Solar Wind ◽  
Cosmic Rays ◽  
Hysteresis Loop ◽  
Magnetic Storm ◽  
Cosmic Ray ◽  
Recovery Phase ◽  
Main Phase ◽  
Cutoff Rigidity ◽  
The Relationship ◽  
Current Systems

<div> <p>The correlations between variations in the geomagnetic cutoff rigidity of cosmic rays and the Dst and Kp geomagnetic indices and solar-wind and IMF parameters are calculated for the three phases of the magnetic storm of November 20–21, 2003: before the storm and during its main and recovery phases. The correlations are the strongest between variations in the cutoff rigidity and the Dst index during all stages. A significant correlation was recorded with the By component of IMF and the field magnitude B; the correlation with By dominated during the main phase, and the correlation with B was dominant during the recovery phase. There is also a high correlation with the dynamic parameters of solar activity during the main phase, especially with the solar-wind speed.</p> <div> <p>As far as we know, hysteresis phenomena have been discovered for the first time in the relationship between the cosmic-ray cutoff rigidities and the parameters of the helio- and magnetosphere on the scale of the magnetic storm (with Moscow station as an example). Loop-like patterns formed, because the trajectories of variations in the cutoff rigidities versus the studied parameters during storm intensification (development of current systems) did not coincide with the trajectories during the recovery phase (decay of current systems). The correlations of the cutoff rigidities with Dst and Kp indices were characterized by a narrow hysteresis loop, and their correlations with the IMF parameters were characterized by a wide hysteresis loop. The hysteresis loops for the relationship between the cutoff rigidities and solar-wind density and pressure were disordered.</p> </div> </div>

Sign in / Sign up

Export Citation Format

Share Document