2008, Компаниец, К. Г., Компаниец, Константин Георгиевич, Петрухин, А. А.

2019, Zadeba, E. A., Borisov, A. A., Fakhrutdinov, R. M., Ivanov, S. S., Kokoulin, R. P., Kompaniets, K. G., Kozhin, A. S., Petrukhin, A. A., Vorobyev, V. S., Yashin, I. I., Задеба, Егор Александрович, Борисов, Анатолий Андреевич, Фахрутдинов, Ринат Макаримович, Кокоулин, Ростислав Павлович, Компаниец, Константин Георгиевич, Кожин, Анатолий Сергеевич, Петрухин, Анатолий Афанасьевич, Воробьев, Владислав Станиславович, Яшин, Игорь Иванович

© Published under licence by IOP Publishing Ltd.The new coordinate-tracking detector based on drift chambers (CTUDC) is created in MEPhI. The detector represents two planes with total area of 30 m2 placed on the opposite sides of Cherenkov water detector of 2000 m3 volume. Each plane consists of 8 large multiwire drift chambers (4000x508x112 mm3). The key advantages of these chambers are a large effective area (1.85 m2) and a good coordinate and angular resolution with a small number of measuring channels. From the beginning of 2017, CTUDC operates as a part of the experimental complex NEVOD. The detector is designed for measuring of high density muon bundles (up to 10 particles per m2) at zenith angles in the range from 30° to 90°. The results of the CTUDC operation during the last year are given, the first distributions of the events in zenith angle, muon bundle multiplicity and density obtained from the detector data are discussed.

2021, Kindin, V. V. , Kompaniets, K. G., Mannocchi, G. , Shutenko, V. V. , Trinchero, G. , Yurina, E. A. , Яшин, Игорь Иванович, Задеба, Егор Александрович, Петрухин, Анатолий Афанасьевич, Хохлов, Семен Сергеевич, Кокоулин, Ростислав Павлович, Богданов, Алексей Георгиевич, Барбашина, Наталья Сергеевна, Barbashina, N. S., Bogdanov, A. G., Khokhlov, S. S., Petrukhin, A. A., Yashin, I. I., Zadeba, E. A., Kokoulin, R. P., Киндин, Виктор Владимирович, Компаниец, Константин Георгиевич, Шутенко, Виктор Викторович

Data of the NEVOD-DECOR experiment on investigations of inclined cosmic ray muon bundles for a long time period (May 2012 – March 2021) are presented. Their comparison with the results of calculations based on simulations of EAS muon component allows one to study the behavior of the energy spectrum and mass composition of primary cosmic rays and/or to check the validity of hadron interaction models in a wide energy range from about 1016 to more than 1018 eV. The analysis showed that the observed intensity of muon bundles at primary particle energies of about 1018 eV and higher can be compatible with the expectation only under the assumption of an extremely heavy mass composition of cosmic rays. This conclusion is consistent with data of a number of other experiments investigating the muon component of air showers at ultra-high energies. On the contrary, measurements of the depth of the shower maximum in the atmosphere (Xmax) in the experiments using air fluorescence technique favor a light mass composition of primary cosmic rays at these energies. This contradiction (so-called “muon puzzle”) cannot be resolved without serious changes of the existing hadron interaction models.

2021, Yurina, E. A. , Kindin, V. V. , Kompaniets, K. G. , Mannocchi, G., Trinchero, G., Shutenko, V. V. , Хохлов, Семен Сергеевич, Яшин, Игорь Иванович, Петрухин, Анатолий Афанасьевич, Кокоулин, Ростислав Павлович, Богданов, Алексей Георгиевич, Барбашина, Наталья Сергеевна, Yashin, I. I., Khokhlov, S. S., Petrukhin, A. A., Kokoulin, R. P., Bogdanov, A. G., Barbashina, N. S., Киндин, Виктор Владимирович, Компаниец, Константин Георгиевич, Шутенко, Виктор Викторович

Allerton Press, Inc.Abstract: The existence of an excessive number of multimuon events observed in many experiments at ultrahigh EAS energies (above 1017 eV) relative to calculations cannot be explained using modern models of hadronic interactions. One way of solving the problem of muon excess is to study the energy characteristics of the EAS muon component. Results are presented from measurements of muon bundle energy characteristics over 7 years of observations. The experimental dependences are compared to results from simulation done with the CORSIKA software package.

2025, Задеба, Е. А., Воробьев, В. С., Газизова, Д. В., Компаниец, К. Г., Мирошниченко, Е. А., Николаенко, Р. В., Трошин, И. Ю., Хомчук, Е. П., Шульженко, И. А., Шутенко, В. В., Воробьев, Владислав Станиславович, Газизова, Диана Вадимовна, Шутенко, Виктор Викторович, Хомчук, Евгений Павлович, Трошин, Иван Юрьевич, Шульженко, Иван Андреевич, Николаенко, Роман Владимирович, Компаниец, Константин Георгиевич, Мирошниченко, Егор Андреевич

В НИЯУ МИФИ создается крупнейший в мире координатный детектор ТРЕК на дрейфовых камерах для исследования мюонов космических лучей. Основой установки являются многопроволочные дрейфовые камеры (ДК), ранее применявшиеся в нейтринном детекторе ИФВЭ (Протвино) на ускорителе У-70. Для исследования характеристик ДК перед установкой в ТРЕК и проектируемый детектор МДМ создан стенд, позволяющий определять их эффективность, координатную и угловую точность, зонные характеристики. В статье приводится устройство стенда и результаты тестирования 394 ДК для установок ТРЕК и МДМ.

2022, Шульженко, Иван Андреевич, Яшин, Игорь Иванович, Хохлов, Семен Сергеевич, Кокоулин, Ростислав Павлович, Громушкин, Дмитрий Михайлович, Богданов, Алексей Георгиевич, Петрухин, Анатолий Афанасьевич, Барбашина, Наталья Сергеевна, Pasyuk, N. A., Kokoulin, R. P., Kindin, V. V., Khokhlov, S. S., Gromushkin, D. M., Bogdanov, A. G., Barbashina, N. S., Shutenko, V. V., Shulzhenko, I. A., Petrukhin, A. A., Yashin, I. I., Amelchakov, M. B., Kompaniets, K. G., Konovalova, A. Y., Ovchinnikov, V. V., Yurin, K. O., Пасюк, Никита Александрович, Шутенко, Виктор Викторович, Овчинников, Вячеслав Васильевич, Коновалова, Алена Юрьевна, Компаниец, Константин Георгиевич, Киндин, Виктор Владимирович, Амельчаков, Михаил Борисович

The Experimental complex NEVOD includes several different setups for studying various components of extensive air showers (EAS) in the energy range from 1010 to 1018eV. The NEVOD-EAS array for detection of the EAS electron–photon component began its data taking in 2018. It is a distributed system of scintillation detectors installed over an area of about 104 m2. A distinctive feature of this array is its cluster organization with different-altitude layout of the detecting elements. The main goal of the NEVOD-EAS array is to obtain an estimation of the primary particle energy for events measured by various detectors of the Experimental complex NEVOD. This paper describes the design, operation principles and data processing of the NEVOD-EAS array. The criteria for the event selection and the accuracy of the EAS parameters reconstruction obtained on the simulated events are discussed. The results of the preliminary analysis of experimental data obtained during a half-year operation are presented.

2020, Likiy, O. I , Шульженко, Иван Андреевич, Компаниец, Константин Георгиевич, Пасюк, Никита Александрович, Shulzhenko, I. A., Kompaniets, K. G., Pasyuk, N. A.

The paper is devoted to the development of a new summator-multiplexor (SM) for the block of electronics of the cluster of detector stations (BECDS) of the NEVOD-EAS air-shower array. The new summator-multiplexor is designed to replace the currently used SMs based on CAEN N169 units. The developed basic circuit diagram and the operation principle of the new SM are described. The results of testing of a prototype of the new summator-multiplexor for the BECDS of the NEVOD-EAS array are discussed.

2019, Kokoulin, R. P., Barbashina, N. S., Bogdanov, A. G., Khokhlov, S. S., Khomyakov, V. A., Kindin, V. V., Kompaniets, K. G., Petrukhin, A. A., Shutenko, V. V., Yashin, I. I., Yurina, E. A., Кокоулин, Ростислав Павлович, Барбашина, Наталья Сергеевна, Богданов, Алексей Георгиевич, Хохлов, Семен Сергеевич, Киндин, Виктор Владимирович, Компаниец, Константин Георгиевич, Петрухин, Анатолий Афанасьевич, Шутенко, Виктор Викторович, Яшин, Игорь Иванович, Юрина, Екатерина Александровна

An experiment on the measurements of the energy deposit of inclined cosmic ray muon bundles is being conducted at the experimental complex NEVOD (MEPhI). The complex includes the Cherenkov water calorimeter with a volume of 2000 m(3) and the coordinate-tracking detector DECOR with a total area of 70 m(2). The DECOR data are used to determine the local muon densities in the bundle events and their arrival directions, while the energy deposits (and hence the average muon energy loss) are evaluated from the Cherenkov calorimeter response. Average energy loss carries information about the mean muon energy in the bundles. The detection of the bundles in a wide range of muon multiplicities and zenith angles gives the opportunity to explore the energy range of primary cosmic ray particles from about 10 to 1000 PeV in the frame of a single experiment with a relatively small compact setup. Experimental results on the dependence of the muon bundle energy deposit on the zenith angle and the local muon density are presented and compared with expectations based on simulations of the EAS muon component with the CORSIKA code.

2020, Chernov, D. V , Kindin, V. V., Kompaniets, K. G., Mannocchi, G., Trinchero, G., Shutenko, V. V. , Yurina, E. A., Петрухин, Анатолий Афанасьевич, Задеба, Егор Александрович, Яшин, Игорь Иванович, Хохлов, Семен Сергеевич, Кокоулин, Ростислав Павлович, Богданов, Алексей Георгиевич, Барбашина, Наталья Сергеевна, Bogdanov, A. G., Barbashina, N. S., Kokoulin, R. P., Petrukhin, A. A., Yashin, I. I., Zadeba, E. A., Khokhlov, S. S., Шутенко, Виктор Викторович, Компаниец, Константин Георгиевич, Киндин, Виктор Владимирович

Data of NEVOD-DECOR experiment on investigations of inclined cosmic ray muon bundles for a long time period (May 2012 – May 2020) are presented. Their comparison with the results of calculations based on simulations of extensive air shower hadron and muon components is carried out. The analysis showed that the observed intensity of muon bundles at primary particle energies of about 1018 eV and higher can be compatible with the expectation only under the assumption of an extremely heavy mass composition of cosmic rays. On the contrary, measurements of the depth of the shower maximum in the atmosphere in the experiments using air fluorescence technique, favour a light mass composition of primary cosmic rays at these energies.

2023, Yurina, E. A., Vorobev, V. S. , Kindin, V. V. , Kompaniets, K. G., Konovalova, A. Yu. , Mannocchi, G. , Trinchero, G. , Shutenko, V. V., Богданов, Алексей Георгиевич, Кокоулин, Ростислав Павлович, Яшин, Игорь Иванович, Хохлов, Семен Сергеевич, Петрухин, Анатолий Афанасьевич, Барбашина, Наталья Сергеевна, Khokhlov, S. S., Yashin, I. I., Kokoulin, R. P., Bogdanov, A. G., Barbashina, N. S., Petrukhin, A. A., Киндин, Виктор Владимирович, Шутенко, Виктор Викторович, Коновалова, Алена Юрьевна, Компаниец, Константин Георгиевич

Results are presented from measuring the energy characteristics of muon bundles in inclined extensive air showers in the NEVOD-DECOR experiment. Estimates of the average energy of muons in the bundles are obtained in the 10 to 1000 PeV range of primary particle energies and compared to values calculated under different assumptions about the composition of cosmic radiation and models of hadronic interactions. An excess of experimental values of the average muon energy relative to calculations is found for high local densities corresponding to primary particle energies above 100 PeV.