2019, Ahdida, C., Albanese, R. M., Alexandrov, A., Anokhina, A., Atkin, E., Dmitrenko, V., Etenko, A., Filippov, K., Gavrilov, G., Grachev, V., Kudenko, Y., Novikov, A., Polukhina, N., Samsonov, V., Shustov, A., Skorokhvatov, M., Smirnov, S., Teterin, P., Ulin, S., Uteshev, Z., Vlasik, K., Аткин, Эдуард Викторович, Дмитренко, Валерий Васильевич, Этенко, Александр Владимирович, Грачев, Виктор Михайлович, Куденко, Юрий Григорьевич, Полухина, Наталья Геннадьевна, Шустов, Александр Евгеньевич, Скорохватов, Михаил Дмитриевич, Смирнов, Сергей Юрьевич, Тетерин, Пётр Евгеньевич, Улин, Сергей Евгеньевич, Утешев, Зияэтдин Мухамедович, Власик, Константин Федорович

© 2019 CERN.This paper presents a fast approach to simulating muons produced in interactions of the SPS proton beams with the target of the SHiP experiment. The SHiP experiment will be able to search for new long-lived particles produced in a 400 GeV/c SPS proton beam dump and which travel distances between fifty metres and tens of kilometers. The SHiP detector needs to operate under ultra-low background conditions and requires large simulated samples of muon induced background processes. Through the use of Generative Adversarial Networks it is possible to emulate the simulation of the interaction of 400 GeV/c proton beams with the SHiP target, an otherwise computationally intensive process. For the simulation requirements of the SHiP experiment, generative networks are capable of approximating the full simulation of the dense fixed target, offering a speed increase by a factor of (106). To evaluate the performance of such an approach, comparisons of the distributions of reconstructed muon momenta in SHiP's spectrometer between samples using the full simulation and samples produced through generative models are presented. The methods discussed in this paper can be generalised and applied to modelling any non-discrete multi-dimensional distribution.

2019, Abiev, A. K., Bagulya, A. V., Chernyavsky, M. M., Dimitrienko, A. A., Grachev, V. M., Polukhina, N. G., Грачев, Виктор Михайлович, Полухина, Наталья Геннадьевна

© 2019, Pleiades Publishing, Ltd.Cosmic ray muonography is a novel technique for imaging of the internal structures of large natural and industrial objects. It exploits the capability of high energy muons from cosmic rays to penetrate large thicknesses of large subjects to be studied, in order to obtain a density map. It uses muon flux attenuation and absorption in materials of investigated objects. Nuclear emulsions are tracking detectors well suited to be employed in muonography for investigations of inner structure of large objects up to kilometers size, since emulsions have firstly an excellent angular resolution, they are compact and robust, do not require power supply. The muonography methods are applied to study one of UNESCO world heritage objects, the unusual building in the Naryn-Kala citadel hidden underground. The use of nuclear emulsions as probing radiation detectors provides for a uniquely high resolution capacity of recording instrumentation combined with the potential of modern image analysis methods giving 3D reconstruction of the internal structures of the investigated object.

2020, Ahdida, C., Albanese, R., Alexandrov, A., Anokhina, A., Atkin, E., Dmitrenko, V., Etenko, A., Filippov, K., Gavrilov, G., Grachev, V., Kudenko, Y., Novikov, A., Polukhina, N., Samsonov, V., Shustov, A., Skorokhvatov, M., Smirnov, S., Teterin, P., Ulin, S., Uteshev, Z., Vlasik, K., Аткин, Эдуард Викторович, Дмитренко, Валерий Васильевич, Этенко, Александр Владимирович, Грачев, Виктор Михайлович, Куденко, Юрий Григорьевич, Полухина, Наталья Геннадьевна, Шустов, Александр Евгеньевич, Скорохватов, Михаил Дмитриевич, Смирнов, Сергей Юрьевич, Тетерин, Пётр Евгеньевич, Улин, Сергей Евгеньевич, Утешев, Зияэтдин Мухамедович, Власик, Константин Федорович

© 2020 CERN. Published by IOP Publishing Ltd on behalf of Sissa Medialab. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.The Search for Hidden Particles (SHiP) experiment proposal at CERN demands a dedicated dipole magnet for its scattering and neutrino detector. This requires a very large volume to be uniformly magnetized at B > 1.2 T, with constraints regarding the inner instrumented volume as well as the external region, where no massive structures are allowed and only an extremely low stray field is admitted. In this paper we report the main technical challenges and the relevant design options providing a comprehensive design for the magnet of the SHiP Scattering and Neutrino Detector.

2019, Alexeev, V. A., Bagulya, A. V., Volkov, A. E., Gippius, A. A., Grachev, V. M., Polukhina, N. G., Грачев, Виктор Михайлович, Полухина, Наталья Геннадьевна

This work was performed within the OLYMPIA experiment on the study of tracks of heavy and superheavy cosmic ray nuclei in olivine crystals from Marjalahti and Eagle Station pallasites. Depth distributions of the track formation rate for heavy cosmic ray nuclei in olivine crystals from pallasites of different pre-atmospheric sizes were obtained. The dependences obtained were used to analyze the data on the track density in olivine crystals from the Marjalahti pallasite. In three crystals, the track distribution with a high density gradient was detected, which indicates a complicated radiation history of the meteorite.

2019, Aleksandrov, A. B., Alekseev, V. A., Bagulya, A. V., Dashkina, A. B., Grachev, V. M., Polukhina, N. G., Грачев, Виктор Михайлович, Полухина, Наталья Геннадьевна

© 2019, Allerton Press, Inc.The results of the search for tracks of heavy and superheavy nuclei of galactic cosmic rays in the charge range Z = 26 − 129, identified in olivine crystals from Maryalahti and Eagle Station meteorites are presented. The database including characteristics of 21743 tracks, obtained in the OLIMPIA experiment, is currently the largest one within the charge range under study. It includes three tracks of superheavy nuclei with charge 119−6 +10 and a minimum lifetime estimated as several tens of years, which can be considered as a direct experimental validation of the existence of natural superheavy nuclei from the “stability island”.

2020, Ulin, S. E., Dmitrenko, V. V., Vlasik, K. F., Grachev, V. M., Egorov, R. R., Krivova, K. V., Madzhidov, A. I., Uteshev, Z. M., Chernysheva, I. V., Shustov, A. E., Улин, Сергей Евгеньевич, Дмитренко, Валерий Васильевич, Власик, Константин Федорович, Грачев, Виктор Михайлович, Егоров, Роман Романович, Кривова, Кира Валериановна, Маджидов, Азизбек Истамович, Утешев, Зияэтдин Мухамедович, Чернышева, Ирина Вячеславовна, Шустов, Александр Евгеньевич

© 2020, Allerton Press, Inc.Abstract: The structure of gamma spectrometry systems for decommissioning nuclear facilities is considered. Physicotechnical characteristics of a xenon gamma spectrometer being a main device for measuring gamma spectra of analyzed objects and determining their activity are presented. The practicability of xenon gamma spectrometers in decommissioning nuclear facilities is shown. The data obtained using the gamma spectrometry system is transmitted over internet to a remote computer to process experimental data in real time.

2019, Shustov, A. E., Ulin, S. E., Novikov, A. S., Dmitrenko, V. V., Grachev, V. M., Chernysheva, I. V., Uteshev, Z. M., Vlasik, K. F., Шустов, Александр Евгеньевич, Улин, Сергей Евгеньевич, Дмитренко, Валерий Васильевич, Грачев, Виктор Михайлович, Чернышева, Ирина Вячеславовна, Утешев, Зияэтдин Мухамедович, Власик, Константин Федорович

© 2019 SPIE.The description of gamma-spectrometric apparatus "Nuclide" intended for the detection and identification of elements of radioactive space debris is presented. This device is planned to be installed on the "Universat-SOCRAT" spacecraft. The results of estimations of the sensitivity of this equipment depending on the distance to the objects under study are presented.

2019, Novikov, A. S., Ulin, S. E., Dmitrenko, V. V., Chernysheva, I. V., Grachev, V. M., Krivova, K. V., Shustov, A. E., Uteshev, Z. M., Vlasik, K. F., Улин, Сергей Евгеньевич, Дмитренко, Валерий Васильевич, Чернышева, Ирина Вячеславовна, Грачев, Виктор Михайлович, Кривова, Кира Валериановна, Шустов, Александр Евгеньевич, Утешев, Зияэтдин Мухамедович, Власик, Константин Федорович

© 2019 SPIE.The description of xenon gamma-ray spectrometers is presented. These devices can be produced with various sensitive volumes (0.2 - 6.0 liters), they provide high energy resolution (∼2% at 662 keV) and are capable of operation in unfavorable conditions (wide temperature range and high level of vibro-acoustic influence). Xenon gamma-ray spectrometers can be used for various fundamental and applied tasks, the outcomes of those applications and the prospect of the detector utilization in various fields are also presented.