Atmospheric effects on the cosmic ray total intensity at sea level

1956 ◽  
Vol 4 (6) ◽  
pp. 1479-1495 ◽  
Author(s):  
F. Bachelet ◽  
A. M. Conforto
Keyword(s):  
Sea Level ◽  
Cosmic Ray ◽  
Atmospheric Effects

RESPONSE OF MU-MESON DETECTORS DEEP IN THE ATMOSPHERE TO PRIMARY COSMIC-RAY PARTICLES OF MAGNETIC RIGIDITY BETWEEN 10 AND 25 GV

1967 ◽  
Vol 45 (5) ◽  
pp. 1643-1653 ◽  
Author(s):  
T. Mathews ◽  
G. G. Sivjee
Keyword(s):  
Sea Level ◽  
Scintillation Counter ◽  
Cosmic Ray ◽  
Decay Rates ◽  
Atmospheric Effects ◽  
Ionization Chambers ◽  
Corrected Data ◽  
Counter Telescope ◽  
East West ◽  
Different Altitudes

The cosmic-ray mu-meson intensities at three different altitudes at the equator were measured as a function of zenith and azimuth angles by means of a portable scintillation counter telescope of semi-opening angles 23°. The data were analyzed to assess the effects of differences in pi- and mu-meson decay rates on the intensity of the penetrating ionizing component at different zenith angles. It was found that the changes of intensity as a function of zenith angles could be attributed almost entirely to differences in atmospheric absorption, provided that at all zenith angles the threshold rigidities were the same. Hence the intensities measured at different zenith angles in the east–west plane at the equator could be corrected to remove the atmospheric effects and the corrected data used for determining the response of meson detectors at sea level to particles of rigidity up to 25 GV. The response curve thus obtained is presented and compared with that obtained from sea-level latitude surveys by means of ionization chambers.

ATMOSPHERIC EFFECTS ON COSMIC RAY INTENSITY AT SEA LEVEL

1959 ◽  
Vol 37 (2) ◽  
pp. 85-101 ◽  
Author(s):  
P. M. Mathews
Keyword(s):  
Sea Level ◽  
Cosmic Ray ◽  
Barometric Pressure ◽  
Theoretical Formula ◽  
Atmospheric Effects ◽  
Cosmic Ray Intensity ◽  
Statistical Fluctuations ◽  
Nucleonic Component ◽  
Primary Origin ◽  
First Time

Cosmic ray intensity variations of primary origin and those caused by meteorological changes appear superposed in records obtained from meson counter telescopes and neutron monitors at sea level. The study of either of these types of variation is thus greatly complicated by the presence of the other. In the present work, we have for the first time taken the step of processing the raw data to eliminate primary variations (and the inherent statistical fluctuations) so as to make possible a direct comparison of the remaining variations with the changes in atmospheric variables over the same period. The subsequent analysis confirms the expectation that there are no appreciable atmospheric effects on the intensity of the nucleonic component beyond the well-known effect associated with the sea level barometric pressure B. But in the meson case there is strong evidence that the widely used set of variables H100, T100 (the height and temperature of the 100-mb level) and B is not very suitable for representing atmospheric effects; it seems essential to include a variable representing temperatures in the lower part of the atmosphere, and the set of variables T800 (temperature of the 800-mb layer), H100, and B, with coefficients kT = −.082 ±.008%/°C, kH = −3.04 ±.61%/km, and kB = −.134 ±.004%/mb appears to be the best. The theoretical formula of Dorman (1957), with a barometric coefficient β = −.147 ±.004%/mb and with the term representing the "temperature effect" reduced by a factor.76 ± .03, gives slightly better results. However, the improvement, at least in the case of the data we have analyzed, is too small to justify the great labor involved in using this formula.

Neutron production by cosmic-ray particles at sea level and underground

1951 ◽  
Vol 8 (5) ◽  
pp. 326-340 ◽  
Author(s):  
R. D. Sard ◽  
M. F. Crouch ◽  
D. R. Jones ◽  
A. M. Conforto ◽  
B. F. Stearns
Keyword(s):  
Sea Level ◽  
Cosmic Ray ◽  
Neutron Production

scholarly journals Observing the neutron component during thunderstorm activity at a mountain CR station

2019 ◽  
Vol 5 (3) ◽  
pp. 54-58
Author(s):  
Анна Луковникова ◽  
Anna Lukovnikova ◽  
Виктор Алешков ◽  
Viktor Aleshkov ◽  
Алексей Лысак ◽  
...  
Keyword(s):  
Field Strength ◽  
Sea Level ◽  
Neutron Monitor ◽  
Electromagnetic Interference ◽  
Count Rate ◽  
Cosmic Ray ◽  
Thunderstorm Activity ◽  
Signal Discrimination ◽  
Lightning Discharges ◽  
Neutron Component

During three summer months in 2015, the Cosmic Ray (CR) station Irkutsk-3000, located at 3000 m above sea level, measured the CR neutron component intensity with the 6NM64 neutron monitor, as well as the atmospheric electric field strength and the level of electromagnetic interference during lightning discharges. It is shown that the level of electromagnetic interference, when registered during lightning discharges, depends considerably on the fixed level of signal discrimination. During observations, we observed no effects of thunderstorm discharges at the neutron monitor count rate at the CR station Irkutsk-3000.

Energy spectrum of cosmic-ray muons at sea level

1964 ◽  
Vol 32 (6) ◽  
pp. 1524-1540 ◽  
Author(s):  
S. Miyake ◽  
V. S. Narasimham ◽  
P. V. Ramana Murthy
Keyword(s):  
Energy Spectrum ◽  
Sea Level ◽  
Cosmic Ray
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