scholarly journals Application of ASAS method to PAMELA calorimeter

2022 ◽  
Vol 2155 (1) ◽  
pp. 012001
Author(s):  
A I Fedosimova ◽  
I A Lebedev ◽  
A G Mayorov ◽  
E A Dmitriyeva ◽  
E A Bondar ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Primary Energy ◽  
Transient Effects ◽  
Energy Reconstruction ◽  
Direct Measurements ◽  
Negative Effect

Abstract In this paper, we propose a method that makes it possible to to improve energy reconstruction for data obtained via thin heterogeneous calorimeters for direct measurements of cosmic rays with energies of TeV and higher. Despite the large number of modern experimental complexes, the primary energy of cosmic nuclei with energies above 1 TeV is determined with large errors associated with fluctuations in the development of the cascade. For heterogeneous calorimeters, transient effects give an additional negative effect. In this paper we analyze the main causes of fluctuations and discuss a method for reducing the effect of fluctuations on the results of primary energy reconstruction. The method of accumulation of signal along the spectrum (ASAS) is used to reduce fluctuations associated with transient effects. The method was tested using the heterogeneous calorimeter of the PAMELA collaboration. It is shown that the proposed approach makes it possible to correctly determine the energy of slowly developing showers, the maxima of which are not measured.

scholarly journals Direct Measurements of Cosmic Rays (TeV and beyond) Using an Ultrathin Calorimeter: Lessening Fluctuation Method

2021 ◽  
Vol 11 (23) ◽  
pp. 11189
Author(s):  
Igor Lebedev ◽  
Anastasia Fedosimova ◽  
Andrey Mayorov ◽  
Pavel Krassovitskiy ◽  
Elena Dmitriyeva ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Primary Energy ◽  
Large Size ◽  
Energy Reconstruction ◽  
Cascade Curve ◽  
Direct Measurements ◽  
Large Fluctuations ◽  
Shower Development ◽  
Fluctuation Method

In this paper, we propose a method that makes it possible to use an ultrathin calorimeter for direct measurements of cosmic rays with energies of TeV and higher. The problems of determining the primary energy with a thin calorimeter, due to large fluctuations in shower development, the low statistics of analyzed events and the large size required for the calorimeter, are considered in detail. A solution to these problems is proposed on the basis of a lessening fluctuation method. This method is based on the assumption of the universality of the development of cascades initiated by particles of the same energy and mass. For energy reconstruction, so-called correlation curves are used. The main analyzed quantities are the size of the cascade and the rate of its development. The method was tested using the calorimeter of the PAMELA collaboration. Based on simulations, it is shown that the primary energy can be determined on the ascending branch of the cascade curve. This fact solves the problems associated with the need to increase the calorimeter thickness with an increase in primary energy and with the limitation of the analyzed events. The proposed technique is universal for different energies and different nuclei.

Atmospheric production and transport of 7Be activity by cosmic rays: Modelling with the chemistry-climate model SOCOLv3.0 and comparison with direct measurements

2021 ◽  
Author(s):  
Kseniia Golubenko ◽  
Eugene Rozanov ◽  
Genady Kovaltsov ◽  
Ari-Pekka Leppänen ◽  
Ilya Usoskin
Keyword(s):  
Cosmic Rays ◽  
Climate Changes ◽  
Climate Model ◽  
Cosmic Ray ◽  
Galactic Cosmic Rays ◽  
Cosmogenic Isotopes ◽  
Cosmogenic Isotope ◽  
The Past ◽  
Direct Measurements ◽  
First Results

<p>We present the first results of modelling of the short-living cosmogenic isotope <sup>7</sup>Be production, deposition, and transport using the chemistry-climate model SOCOLv<sub>3.0</sub> aimed to study solar-terrestrial interactions and climate changes. We implemented an interactive deposition scheme,  based on gas tracers with and without nudging to the known meteorological fields. Production of <sup>7</sup>Be was modelled using the 3D time-dependent Cosmic Ray induced Atmospheric Cascade (CRAC) model. The simulations were compared with the real concentrations (activity) and depositions measurements of <sup>7</sup>Be in the air and water at Finnish stations. We have successfully reproduced and estimated the variability of the cosmogenic isotope <sup>7</sup>Be produced by the galactic cosmic rays (GCR) on time scales longer than about a month, for the period of 2002–2008. The agreement between the modelled and measured data is very good (within 12%) providing a solid validation for the ability of the SOCOL CCM to reliably model production, transport, and deposition of cosmogenic isotopes, which is needed for precise studies of cosmic-ray variability in the past. </p>

Direct Measurements of Cosmic Rays (up to ∼TeV and beyond)

2009 ◽  
Author(s):  
Stéphane Coutu ◽  
Denis Cabezas ◽  
C. J. Solano Salinas ◽  
Reyna Xoxocotzi ◽  
Carlos Javier Solano Salinas ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Direct Measurements

Overview of Direct Measurements of Cosmic Rays

2019 ◽  
Vol 43 (3) ◽  
pp. 327-341
Author(s):  
PENG Xiao-yan ◽  
YUAN Qiang
Keyword(s):  
Cosmic Rays ◽  
Direct Measurements

Primary energy spectrum of cosmic rays obtained by arrival time spread of particles in EAS

2008 ◽  
Vol 175-176 ◽  
pp. 322-325 ◽  
Author(s):  
M. Okita ◽  
T. Wada ◽  
Y. Yamashita ◽  
K. Okei ◽  
T. Morita ◽  
...  
Keyword(s):  
Energy Spectrum ◽  
Cosmic Rays ◽  
Arrival Time ◽  
Primary Energy ◽  
Time Spread

THE EXPERIMENTAL DATA ON THE HIGH ENERGY GALACTIC COSMIC RAYS FROM EAS-TOP

2005 ◽  
Vol 20 (29) ◽  
pp. 6817-6820
Author(s):  
◽  
P. L. GHIA ◽  
G. NAVARRA
Keyword(s):  
Experimental Data ◽  
Cosmic Rays ◽  
Energy Range ◽  
High Energy ◽  
Galactic Cosmic Rays ◽  
Direct Measurements ◽  
Galactic Radiation

We summarize the main results reported by EAS-TOP in the study of cosmic rays in the energy range 1012 – 1016 eV (from the direct measurements up to above the "knee"), i.e. the region which is generally considered to represent the high energy galactic radiation.

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