Long-term and transient time variation of cosmic ray fluxes detected in Argentina by CARPET cosmic ray detector

Mendonça, R. R. S.; Raulin, J. P.; Bertoni, F.; Echer, E.; Махмутов, В. С.; Fernandez, G.

doi:10.1016/j.jastp.2010.09.034

Cited by 32 publications

(22 citation statements)

References 14 publications

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“…No large variations of the ground temperature were observed. Finally, during this period we have also verified that there was no atmospheric electric field variations nor rain occurrence (see De Mendonça et al [2011] for details of the influence of atmospheric electric field variations and rain occurrence on the cosmic ray intensity observed by the CARPET detector). We have analyzed the atmospheric pressure deviation (ΔP) and the corresponding relative deviation of the cosmic ray intensity (ΔI/I) observed by the channel N12.…”

Section: Pressure Effectsupporting

confidence: 62%

Analysis of atmospheric pressure and temperature effects on cosmic ray measurements

et al. 2013

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[1] In this paper, we analyze atmospheric pressure and temperature effects on the records of the cosmic ray detector CARPET. This detector has monitored secondary cosmic ray intensity since 2006 at Complejo Astronómico El Leoncito (San Juan, Argentina, 31 S, 69 W, 2550 m over sea level) where the geomagnetic rigidity cutoff, R c , is~9.8 GV. From the correlation between atmospheric pressure deviations and relative cosmic ray variations, we obtain a barometric coefficient of -0.44 AE 0.01 %/hPa. Once the data are corrected for atmospheric pressure, they are used to analyze temperature effects using four methods. Three methods are based on the surface temperature and the temperature at the altitude of maximum production of secondary cosmic rays. The fourth method, the integral method, takes into account the temperature height profile between 14 and 111 km above Complejo Astronómico El Leoncito. The results obtained from these four methods are compared on different time scales from seasonal time variations to scales related to the solar activity cycle. Our conclusion is that the integral method leads to better results to remove the temperature effect of the cosmic ray intensity observed at ground level.

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Section: Pressure Effectsupporting

confidence: 62%

Analysis of atmospheric pressure and temperature effects on cosmic ray measurements

et al. 2013

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“…Menodonça et al (2011) found a large sample of hour-scale radiation excesses during periods of precipitation at the CARPET cosmic-ray detector in Argentina. While these would typically be interpreted as radon washout in the absence of spectroscopic information, the authors noted that the radiation correlated with the presence of high electric fields when controlling for the total rainfall in the event, suggesting a possible role for particle acceleration even at these longer timescales.…”

Section: Glows Observed From the Groundmentioning

confidence: 99%

High-Energy Atmospheric Physics: Terrestrial Gamma-Ray Flashes and Related Phenomena

2012

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It is now well established that both thunderclouds and lightning routinely emit x-rays and gamma-rays. These emissions appear over wide timescales, ranging from submicrosecond bursts of x-rays associated with lightning leaders, to sub-millisecond bursts of gamma-rays seen in space called terrestrial gamma-ray flashes, to minute long glows from thunderclouds seen on the ground and in or near the cloud by aircraft and balloons. In particular, terrestrial gamma-ray flashes (TGFs), which are thought to be emitted by thunderclouds, are so bright that they sometimes saturate detectors on spacecraft hundreds of kilometers away. These TGFs also generate energetic secondary electrons and positrons that are detected by spacecraft in the inner magnetosphere. It is generally believed that these x-ray and gamma-ray emissions are generated, via bremsstrahlung, by energetic runaway electrons that are accelerated by electric fields in the atmosphere. In this paper, we review this newly emerging field of High-Energy Atmospheric Physics, including the production of runaway electrons, the production and propagation of energetic radiation, and the effects of both on atmospheric electrodynamics.

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“…This may not be absolutely accurate and therefore indicates the limitation of our method, but it can in fact correctly show the negative correlation between these two trends. The function of the exponential fitting curve is: (1) where N is the daily average number of events, Ft is the monthly total number of flares, N0, k1 and A are constants whose values are 60802.98, 23545.33 and -0.03135 respectively. The coefficient of determination is 0.88037.…”

Section: Analysis On the Effects Of Characteristic Solar Activity Parmentioning

confidence: 99%

“…In the realm of cosmic ray physics and astrophysics, the significance of analysis on the physical nature of the cosmic radiation variations in different time scales is beyond dispute [1]. The Earth is continuously exposed to various and innumerable particles from the outer space.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Solar Activity and Atmospheric Pressure Competition Effects on Cosmic Radiation Events

2020

Can. J. Phys.

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In this paper, we analyze the influence of characteristic solar activity parameters as well as the competition effects in solar activity and atmospheric pressure on the records of cosmic radiation based on HiSPARC, a ground-based detector monitoring secondary cosmic ray intensity. We gather the data from No.501 HiSPARC station situated at Nikhef in Science Park, Amsterdam, Netherlands (52. 3558963°N, 4.9509827°E, 56.18 m of altitude). From the anticorrelation between the number of solar flares, relative number of sunspots and that of events, we obtain the formula through an exponential fitting model. Furthermore, we quantitatively find the correlation between the daily average number of cosmic ray events and the characteristic solar activity parameters, including the number, the area and the latitude of sunspot groups within one month. Turning to the combined effects of solar activity and atmospheric pressure, we calculate the critical interval, beyond which the influence of solar activity on the number of events is weaker.

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Long-term and transient time variation of cosmic ray fluxes detected in Argentina by CARPET cosmic ray detector

Cited by 32 publications

References 14 publications

Analysis of atmospheric pressure and temperature effects on cosmic ray measurements

Analysis of atmospheric pressure and temperature effects on cosmic ray measurements

High-Energy Atmospheric Physics: Terrestrial Gamma-Ray Flashes and Related Phenomena

Analysis of Solar Activity and Atmospheric Pressure Competition Effects on Cosmic Radiation Events

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