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

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

© 2019, Allerton Press, Inc.Abstract: Results are presented from analyzing experimental data on 0.1–10 TeV cascade showers generated by muons in the NEVOD Cherenkov water detector. The procedure for selecting and reconstructing the parameters of events with cascades in the detector volume is discussed. Results are presented from measurements of the zenith angle distribution of cascades for different energies. The measured distributions are compared to results from calculations.

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

© 2019, Allerton Press, Inc.Abstract: Energy characteristics of the muon component of extensive air showers (EASes) are investigated at the NEVOD experimental complex in order to solve the problem of a detected excess of muons in EASes at ultrahigh energies, relative to simulation results. The dependences of the energy deposit of muon bundles on the zenith angle and the local muon density are obtained for primary energies of 10–1000 PeV. The results from comparing the data to simulations performed with the CORSIKA program are presented.

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.

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, Khohlov, S. S., Amelchakov, M. B., Vorobyev, V. S., Izhbulyakova, Z. T., Kovylyaeva, A. A., Хохлов, Семен Сергеевич, Амельчаков, Михаил Борисович, Воробьев, Владислав Станиславович

© 2019, Allerton Press, Inc.Abstract: Results are presented from studying the anisotropy of the flux of very high-energy cosmic rays on the basis of muon bundles. Events were recorded in the period 2012–2018 by the DECOR coordinate-tracking detector, part of the unique research setup of the NEVOD experimental complex. The results from analyzing the anisotropy for two samples of events with muon bundles corresponding to different ranges of primary particle energy (E > 1015 eV and E > 1016 eV) are discussed, and estimates are made of dipole anisotropy parameters (amplitude and phase).

2019, Gromushkin, D. M., Bogdanov, F. A., Bouchama, L., Bulan, A. V., Izhbulyakova, Z. T., Khokhlov, S. S., Stenkin, Y. V., Yurin, K. O., Громушкин, Дмитрий Михайлович, Хохлов, Семен Сергеевич, Стенькин, Юрий Васильевич

© 2019, Pleiades Publishing, Ltd.Two installations that allow to detect the EAS hadron component in a continuous mode, the Cherenkov water calorimeter (CWC) NEVOD and PRISMA-32 are operated in MEPhI. The comparison of the characteristics of EAS simultaneously registered by CWC NEVOD and PRISMA-32 are presented. Groups of events with different positions of the shower axis are considered.

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

© 2019, Pleiades Publishing, Ltd.Investigations of the energy loss of muon bundles are being conducted at the Experimental complex NEVOD. Such investigations are directed to detailed study of “muon puzzle” (the excess of multi-muon events observed in several cosmic ray experiments at ultra-high energies). Results of measurements of the muon bundle energy deposit during a long period of observations in primary cosmic ray energy range 10–1000 PeV have been obtained and have been compared with simulations performed on the basis of the CORSIKA code.