2018, Шульженко, И. А., Шульженко, Иван Андреевич, Петрухин, А. А.

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.

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.

2019, Amelchakov, M. B., Bogdanov, A. G., Khokhlov, S. S., Kokoulin, R. P., Petrukhin, A. A., Shulzhenko, I. A., Yashin, I. I., Амельчаков, Михаил Борисович, Богданов, Алексей Георгиевич, Хохлов, Семен Сергеевич, Кокоулин, Ростислав Павлович, Петрухин, Анатолий Афанасьевич, Шульженко, Иван Андреевич, Яшин, Игорь Иванович

© 2019, Pleiades Publishing, Ltd.The results of the long-term measurements of extensive air showers with the calibration telescope system of the Cherenkov water detector are presented for an energy range of 1014–1017 eV. We have used two independent methods for reconstruction of the charged particle local density spectrum: by the multiplicity of the hit counters and by their amplitude responses. By means of Geant4 calculations, we have shown how the structure of the building and the water tank affect the results of the spectrum reconstruction. We obtained two different exponents of charged particles’ local density spectra for CTS top and bottom plane. The results are compared with CORSIKA calculations and data from other setups.

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, 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.

2019, Mannocchi, G., Trinchero, G., Amelchakov, M. B., Barbashina, N. S., Bogdanov, A. G., Gromushkin, D. M., Zadeba, E. A., Kindin, V. V., Kokoulin, R. P., Kompaniets, K. G., Chiavassa, A., Likiy, O. I., Petrukhin, A. A., Stenkin, Y. V., Khokhlov, S. S., Shulzhenko, I. A., Shutenko, V. V., Yurin, K. O., Yashin, I. I., Амельчаков, Михаил Борисович, Барбашина, Наталья Сергеевна, Богданов, Алексей Георгиевич, Громушкин, Дмитрий Михайлович, Задеба, Егор Александрович, Киндин, Виктор Владимирович, Кокоулин, Ростислав Павлович, Компаниец, Константин Георгиевич, Петрухин, Анатолий Афанасьевич, Стенькин, Юрий Васильевич, Хохлов, Семен Сергеевич, Шульженко, Иван Андреевич, Шутенко, Виктор Викторович, Яшин, Игорь Иванович

© 2019, Allerton Press, Inc.Abstract: The NEVOD experimental complex was created at MEPhI. It includes several facilities for studying the electron–photon, muon, and hadron components of the EAS in the energy range of 1 PeV to 1 EeV. This work presents the first results for two months of the joint operation of five facilities (NEVOD-EAS, CWD, CTS, PRISMA-32, and DECOR). The problems of synchronizing the facilities and selecting joint events are considered. The experimental data of these facilities are analyzed for different components of the EAS in overlapping energy ranges.

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.

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.