Applying universality in the development of cascade processes for the research of high energy cosmic particles in space experiments

Fedosimova, Anastasiya; Kharchevnikov, P. B.; Lebedev, Igor; Temiraliev, Abzal

doi:10.1051/epjconf/201714510004

Cited by 3 publications

(5 citation statements)

References 8 publications

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“…In addition, fluctuations in the number of particles in a shower depend on the initial collision geometry and on the features of the nucleus-nucleus interaction. Different approaches and methods are used in order to study such features in the multiparticle production [16][17][18].…”

Section: Methods Of the Correlation Curvesmentioning

confidence: 99%

“…When the number of secondary particles in a shower becomes large, the fluctuations of the individual interactions more or less compensate each other. Therefore, all the cascades formed by primary particles of the same mass and energy, starting from a certain moment, develop almost equally [14,19].…”

Section: Methods Of the Correlation Curvesmentioning

confidence: 99%

“…In paper [14], we showed that the method of correlation curves can be applied to direct measurements of the energy of cosmic rays. For analysis, the results of modeling extensive air showers with energies of 10 14 -10 17 eV were used.…”

Section: Introductionmentioning

confidence: 99%

“…Different types of absorbers are considered. To understand the essence of the method, some results of [14] are presented in the section 'Method of the correlation curves. '…”

Section: Introductionmentioning

confidence: 99%

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Determination of the primary energy using an ultrathin calorimeter

Dmitrieva

Fedosimova

Lebedev

et al. 2020

J. Phys. G: Nucl. Part. Phys.

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An approach for measuring energy of cosmic-ray particles with energies E > 1012 eV using an ultrathin calorimeter is presented. The method is based on the analysis of the correlation dependence of the cascade size on the rate of development of the cascade process. In order to determine the primary energy, measurements are made based on the number of secondary particles in the cascade, N e , at two observation levels Z 1 and Z 2, separated by an absorber layer. Based on the obtained measurements, a correlation analysis of the dependence of logN e (Z 1) on th e difference d N = logN e (Z 1) − logN e (Z 2) is carried out. The correlation curves (logN e from d N) in the negative part of the dN axis are almost parallel to each other and practically do not depend on the depth of the cascade development. It makes it possible to determine the primary energy using an ultrathin calorimeter. The best option for applying the method is a calorimeter, which has a unit with a heavy target, leading to the rapid development of the cascade, and a homogeneous measuring and absorption block.

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Section: Methods Of the Correlation Curvesmentioning

confidence: 99%

Section: Methods Of the Correlation Curvesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Different types of absorbers are considered. To understand the essence of the method, some results of [14] are presented in the section 'Method of the correlation curves. '…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Determination of the primary energy using an ultrathin calorimeter

Dmitrieva

Fedosimova

Lebedev

et al. 2020

J. Phys. G: Nucl. Part. Phys.

Self Cite

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“…When there are many particles in a cascade, the property of universality of the cascade development is realized. All cascades initiated by particles of the same energy and mass develop in the same way [27,28].…”

Section: Fluctuations In Cascade Developmentmentioning

confidence: 99%

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

et al. 2021

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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.

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Application of ASAS method to PAMELA calorimeter

Fedosimova

Lebedev

Mayorov

et al. 2022

J. Phys.: Conf. Ser.

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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.

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Applying universality in the development of cascade processes for the research of high energy cosmic particles in space experiments

Cited by 3 publications

References 8 publications

Determination of the primary energy using an ultrathin calorimeter

Determination of the primary energy using an ultrathin calorimeter

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

Application of ASAS method to PAMELA calorimeter

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