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.

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.

2019, Likiy, O. I., Amelchakov, M. B., Bogdanov, A. G., Chiavassa, A., Khokhlov, S. S., Kokoulin, R. P., Shulzhenko, I. A., Амельчаков, Михаил Борисович, Богданов, Алексей Георгиевич, Хохлов, Семен Сергеевич, Кокоулин, Ростислав Павлович, Шульженко, Иван Андреевич

© 2019, Pleiades Publishing, Ltd.In 2018, the creation of the central part of the NEVOD-EAS cluster-type array aimed at detection of the electron-photon component of extensive air showers in the energy range from 1015 to 1017 eV was completed. At present, a continuous data taking is being performed at the array. The results of the reconstruction of registered extensive air showers using the methods developed within the framework of the cluster approach to experimental data analysis are presented.

2023, Amelchakov, M. B. , Konovalova, A. Yu. , Nugaeva, K. R., Pochestnev, A. D. , Yuzhakova, E. A. , Хохлов, Семен Сергеевич, Петрухин, Анатолий Афанасьевич, Шульженко, Иван Андреевич, Кокоулин, Ростислав Павлович, Богданов, Алексей Георгиевич, Громушкин, Дмитрий Михайлович, Дмитриева, Анна Николаевна, Bogdanov, A. G., Gromushkin, D. M., Dmitrieva, A. N., Kokoulin, R. P., Konovalova, A. Y., Nugaeva, K. R., Petrukhin, A. A., Pochestnev, A. D., Khokhlov,S. S., Shulzhenko, I. A., Yuzhakova, E. A., Amelchakov, M. B., Нугаева, Корнелия Рустемовна, Коновалова, Алена Юрьевна, Почестнев, Андрей Дмитриевич, Амельчаков, Михаил Борисович, Южакова, Елена Александровна

Parameters of extensive air showers detected by the facilities of the NEVOD Experimental Complex are analyzed and compared with events simulated. The calibration and energy threshold of the NEVOD-EAS detector are discussed, as well as the results of retrieval of the axis directions from the NEVOD-EAS and DECOR data. An example of the event detected by all facilities of the complex is given.

2021, Шульженко, Иван Андреевич, Хохлов, Семен Сергеевич, Петрухин, Анатолий Афанасьевич, Пасюк, Никита Александрович, Киндин, Виктор Владимирович, Каретникова, Татьяна Александровна, Shulzhenko, I. A., Petrukhin, A. A., Pasyuk, N. A., Khokhlov, S. S., Karetnikova, T. A., Kindin, V. V.

IOP Publishing Ltd and Sissa Medialab.The method for studying characteristics of the response of optical modules of neutrino telescopes to various classes of events registered in the volume of the Cherenkov water detector NEVOD is discussed. Results of testing of an optical module with Hamamatsu R877 photomultiplier in single muon events and in events with high energy deposit are presented.

2019, Yashin, I. I., Bogdanov, F. A., Gromushkin, D. M., Kokoulin, R. P., Petrukhin, A. A., Semov, P. A., Shulzhenko, I. A., Stenkin, Y. V., Yurin, K. O., Яшин, Игорь Иванович, Громушкин, Дмитрий Михайлович, Кокоулин, Ростислав Павлович, Петрухин, Анатолий Афанасьевич, Шульженко, Иван Андреевич, Стенькин, Юрий Васильевич

© Published under licence by IOP Publishing Ltd. First prototypes of PRISMA-32 neutron detectors based on the ZnS (Ag) scintillator demonstrated the perspectives of their application for detection of neutrons in extensive air showers. Detected thermal neutrons are generated due to interactions of the hadronic component with the nuclei of the atmosphere or the matter surrounding the detector and carry important information about the energy of primary particles. A mixture of zinc sulfide with natural boron (ZnS + B 2 O 3 ) is used in the URAN setup. Detectors of the URAN array are located on the roofs of NEVOD and neighboring laboratory buildings; the area of each detector is 0.36 m 2 . The array consists of independent clusters of 12 detectors in each and is united by a central station of collection and processing of information. Two new clusters of the array were put into operation in 2017, synchronization with other NEVOD setups (NEVOD-EAS array and NEVOD-DECOR-SCT) was provided, and collection of experimental data was started with the area of about 10 3 m 2 . The first events of the EAS with neutrons have been registered and data on the temporal distribution of EAS neutrons have been obtained.

2022, Петрухин, Анатолий Афанасьевич, Шульженко, Иван Андреевич, Яшин, Игорь Иванович, Кокоулин, Ростислав Павлович, Хохлов, Семен Сергеевич, Задеба, Егор Александрович, Yashin, I.I., Shulzhenko, I. A., Petrukhin, A. A., Kokoulin, R. P., Khokhlov, S. S., Zadeba, E. .

The muon puzzle is an excess of muon bundles generated by primary cosmic rays (PCR) at energies above 10 eV compared to estimations that assume even a heavy composition of PCR. The appearance of such excess of muons can be caused both by cosmophysical (the change in the spectrum and composition of cosmic rays) and nuclear-physical (the changing features of the hadron interaction) reasons. To separate these two possibilities it is necessary to measure energy characteristics of muon bundles and their dependence on energy of primary particles. Today the complex NEVOD-DECOR is the only one for such type experiment conduction. To improve the conditions of this experiment a further development of the experimental complex is planned: construction of new coordinate-tracking detector TREK for increasing of the area and improving of spatial resolution of muon track detection, modernization of the Cherenkov water detector for optimization of its structure and improvement of accuracy of energy deposit of muon bundle measurement, inclusion of the installation NEVOD-EAS in the experiment for independent evaluation of primary particle energy.

2020, Izhbulyakova, Z. T., Bogdanov, A. G., Bogdanov, F. A., Gromushkin, D. M., Pochestnev, A. D., Shulzhenko, I. A., Yurin, K. O., Богданов, Алексей Георгиевич, Громушкин, Дмитрий Михайлович, Почестнев, Андрей Дмитриевич, Шульженко, Иван Андреевич

© Published under licence by IOP Publishing Ltd.The URAN array was created in the Scientific and Educational Centre NEVOD (MEPhI). The URAN facility was designed to register neutrons that accompany EAS at the energies of the primary cosmic rays around and above the "knee". It includes 72 detectors based on a thin inorganic scintillator for registration of the charged and neutron components of the EAS. The total area of the facility is about 103 m2. For the correct interpretation of the experimental data of the URAN, the response of the URAN facility to the passage of EAS was simulated using the CORSIKA7.6900 program and Geant4.10.5 software package. It gave a possibility to study neutron generation in the experimental complex building. Experimental data were processed and analyzed. Results of simulation and experimental data are presented.

2019, Chiavassa, A., Shulzhenko, I. A., Шульженко, Иван Андреевич

© Published under licence by IOP Publishing Ltd.The NEVOD-EAS air shower array is currently under construction in MEPhI, within the Russian-Italian NEVOD-DECOR partnership. The goal of the array is to provide an independent measurement of the size, of the core location and of the arrival direction of the extensive air showers (EAS) detected with the other facilities of the Experimental complex NEVOD. These measurements will provide a calibration of a novel perspective technique developed in the Experimental complex NEVOD for studying inclined muon bundles-the method of local muon density spectra. The array will also extend the opportunities of the Experimental complex NEVOD in carrying out multi-component studies of extensive air showers. The present status of the NEVOD-EAS air-shower array is described and the future perspectives are discussed.