2013, Хохлов, С. С., Хохлов, Семен Сергеевич, Яшин, И. И.

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.

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.

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.

2019, Khokhlov, S. S., Bogdanov, A. G., Khomyakov, V. A., Kindin, V. V., Kokoulin, R. P., Petrukhin, A. A., Shutenko, V. V., Yashin, I. I., Хохлов, Семен Сергеевич, Богданов, Алексей Георгиевич, Киндин, Виктор Владимирович, Кокоулин, Ростислав Павлович, Петрухин, Анатолий Афанасьевич, Шутенко, Виктор Викторович, Яшин, Игорь Иванович

Results of analysis of experimental data on cascade showers with energies of 0.1 - 10 TeV initiated by muons in the Cherenkov water detector NEVOD are presented. The method of selection and reconstruction of cascade parameters in the volume of the detector is discussed. Experimental distributions of cascade axes in zenith angle and energy spectrum of cascades are obtained. The measured distributions are compared with results of calculations.

2019, Petrukhin, A. A., Khokhlov, S. S., Петрухин, Анатолий Афанасьевич, Хохлов, Семен Сергеевич

The possibility to calibrate the new optical modules mDOM of the IceCube-Upgrade neutrino telescope inside the tank of Cherenkov water detector NEVOD is discussed. Methods to calibrate optical modules are presented. The spatial lattice of the detector NEVOD and deployed outside of the water tank calibration telescope system and coordinate-tracking detector DECOR allow calibrating the response of mDOM with respect to the Cherenkov light from muons, muon bundles and cascades with known trajectories.

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.

2024, Петрухин, А. А., Тимаков, С. С., Хохлов, С. С., Хохлов, Семен Сергеевич, Петрухин, Анатолий Афанасьевич, Тимаков, Станислав Сергеевич

Изобретение относится к способам исследования атмосферы и может быть использовано для дистанционного обнаружения опасных атмосферных явлений и определения направления их движения. Сущность: измеряют излучение в узких азимутальных секторах одновременно со всех азимутальных направлений. Проводят частотно-временной анализ измеренного сигнала и выявляют возмущенные области. При этом в качестве излучения используют естественный корпускулярный поток мюонов космических лучей. Для каждого мюона измеряют азимутальный угол прихода. Измеренным сигналом является временной ряд азимутального сектора, состоящий из количества мюонов, зарегистрированных в данном азимутальном секторе в последовательные интервалы времени. Технический результат: исследование атмосферы при помощи потока мюонов космических лучей, исключение негативного воздействия на окружающую среду и здоровье человека. 1 з.п. ф-лы, 5 ил.

2019, Khokhlov, S., Хохлов, Семен Сергеевич

© Published under licence by IOP Publishing Ltd.One of the best ways for the investigations of the VHE muons spectrum is measuring the spectrum of stochastic energy losses (cascades). IceCube is the detector capable of measuring the cascade spectrum in the energy region between tens of TeV and one PeV where manifestation of the prompt muon production mechanisms is predicted. In events with muon bundles, the longitudinal energy deposit profile reconstructed by means of a maximum likelihood method is analyzed. Cascade energies are estimated for the events in which the highest local energy deposit is much greater than the median energy deposit. The technique of cascade spectrum reconstruction has been tested with MC-simulated events. Criteria of the event selection, cascade parameters estimation accuracy and the efficiency of the spectrum reconstruction are discussed.

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.