Персона: Полухина, Наталья Геннадьевна
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Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
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Наталья Геннадьевна
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- ПубликацияОткрытый доступThe experimental facility for the Search for Hidden Particles at the CERN SPS(2019) 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 ФедоровичThe Search for Hidden Particles (SHiP) Collaboration has shown that the CERN SPS accelerator with its 400 GeV/c proton beam offers a unique opportunity to explore the Hidden Sector [1-3]. The proposed experiment is an intensity frontier experiment which is capable of searching for hidden particles through both visible decays and through scattering signatures from recoil of electrons or nuclei. The high-intensity experimental facility developed by the SHiP Collaboration is based on a number of key features and developments which provide the possibility of probing a large part of the parameter space for a wide range of models with light long-lived super-weakly interacting particles with masses up to O(10) GeV/c(2) in an environment of extremely clean background conditions. This paper describes the proposal for the experimental facility together with the most important feasibility studies. The paper focuses on the challenging new ideas behind the beam extraction and beam delivery, the proton beam dump, and the suppression of beam-induced background.
- ПубликацияОткрытый доступSensitivity of the SHiP experiment to Heavy Neutral Leptons(2019) 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 ФедоровичHeavy Neutral Leptons (HNLs) are hypothetical particles predicted by many extensions of the Standard Model. These particles can, among other things, explain the origin of neutrino masses, generate the observed matter-antimatter asymmetry in the Universe and provide a dark matter candidate. The SHiP experiment will be able to search for HNLs produced in decays of heavy mesons and travelling distances ranging between O(50 m) and tens of kilometers before decaying. We present the sensitivity of the SHiP experiment to a number of HNL's benchmark models and provide a way to calculate the SHiP's sensitivity to HNLs for arbitrary patterns of flavour mixings. The corresponding tools and data files are also made publicly available.
- ПубликацияОткрытый доступMuon Radiography of Large Natural and Industrial Objects—A New Stage in the Nuclear Emulsion Technique(2022) Aleksandrov, A. B.; Vasina, S. G.; Galkin, V. I.; Grachev, V. M.; Konovalov, A. S.; Konovalova, N. S.; Korolev, P. S.; Larionov, A. A.; Managadze, A. K.; Melnichenko, I. A.; Okateva, N. M.; Polukhina, N. G.; Roganova, T. M.; Sadykov, Zh. T.; Starkov, N. I.; Starkova, E. N.; Tioukov, V. E.; Chernyavskiy, M. M.; Shevchenko, V. I.; Shchedrina, T. V.; Полухина, Наталья Геннадьевна; Шевченко, Владимир Игоревич; Грачев, Виктор МихайловичA new study of a historical object on the territory of the Russian Federation, the Holy Trinity Danilov Monastery, implemented by the muon radiography is presented. The method is based on the registration of changes in the cosmic muon fluxes during their passage through the object under study. Nuclear photoemulsions with unique spatial and angular resolution having the widest range of applications in experimental nuclear physics were used as experimental equipment. The experiment demonstrates a high efficiency of the method in the search for hidden objects, the presence of which on the territory of the monastery is confirmed by the results obtained. Acknowledgement: В статье нет раздела Acknowledgement
- ПубликацияОткрытый доступMuography of Large Natural and Industrial Objects(2021) Alexandrov, A. B.; Chernyavsky, M. M.; Galkin, V. I.; Goncharova, L. A.; Grachev, V. M.; Konovalov, A. S.; Konovalova, N. S.; Korolev, P. S.; Larionov, A. A.; Managadze, A. K.; Melnichenko, I. A.; Okateva, N. M.; Polukhina, N. G.; Roganova, T. M.; Sadykov, Zh. T.; Shchedrina, T. V.; Shevchenko, V. I.; Starkov, N. I.; Tyukov, V. E.; Starkova, E. N.; Vasina, S. G.; Грачев, Виктор Михайлович; Полухина, Наталья Геннадьевна; Шевченко, Владимир ИгоревичOne of the modern approaches to solving research and practical problems by studying internal structure of large natural and industrial objects on the base of muon radiography (muography) is presented. A large number of problematic geologically active zones on the Earth surface, the state of which poses a threat to the infrastructure located in them, require constant monitoring. For this purpose, as well as for the study of cultural heritage objects, in particular, when studying their hidden elements or damage, the muography method [1] can be used. The method, which is at testing and initial implementation phase in Russia, enables to solve these problems in an affordable and safe non-invasive way and provides for a threedimensional image of the internal structure of the objects under study without damaging or destroying them. The method is based on analysis of the cosmic muon flux absorption during their passage through the substance of the object under study.
- ПубликацияОткрытый доступMuography of the Cave Church of the Holy Dormition Pskovo-Pechersky Monastery(2023) Alexandrov, A. B.; Anokhina, A. M.; Vasina, S. G.; Gippius, A. A.; Gorbunov, V. A.; Grachev, V. M.; Konovalova, N. S.; Krasilnikova, Yu. O.; Larionov, A. A.; Managadze, A. K.; Melnichenko, I. A.; Okateva, N. M.; Paramonov, S. S.; Petrukhin, A. A.; Polukhina, N. G.; Roganova, T. M.; Sadykov, Zh. T.; Starkov, N. I.; Starkova, E. N.; Tioukov, V. E.; Chernyavskii, M. M.; Shevchenko, V. I.; Shchedrina, T. V.; Полухина, Наталья Геннадьевна; Шевченко, Владимир Игоревич; Ларионов, Алексей Александрович; Петрухин, Анатолий АфанасьевичThe method for visualizing the internal structure of objects (muography method) based on the analysis of the features of passages of atmospheric muons generated in cosmic ray interactions, is based on the spatial distributions of trajectories of penetrating muons recorded by detectors. The method is at the junction of elementary particle physics with many other areas of natural science, e.g., with archaeology. The article presents the results of a muographic study of two objects in the cave complex of a unique historical and archaeological monument, i.e., the Holy Dormition Pskovo-Pechersky Monastery. The experimental technique is based on nuclear emulsion detectors.
- ПубликацияОткрытый доступMeasurement of the cosmic ray muon flux seasonal variation with the OPERA detector(2019) Agafonova, N.; Alexandrov, A.; Anokhina, A.; Aoki, S.; Polukhina, N.; Полухина, Наталья Геннадьевна© 2019 IOP Publishing Ltd and Sissa Medialab.The OPERA experiment discovered muon neutrino into tau neutrino oscillations in appearance mode, detecting tau leptons by means of nuclear emulsion films. The apparatus was also endowed with electronic detectors with tracking capability, such as scintillator strips and resistive plate chambers. Because of its location in the underground Gran Sasso laboratory, under 3800 m.w.e., the OPERA detector has also been used as an observatory for TeV muons produced by cosmic rays in the atmosphere. In this paper the measurement of the single muon flux modulation and its correlation with the seasonal cycle of atmospheric temperature is reported.
- ПубликацияОткрытый доступMuon radiography method for non-invasive probing an archaeological site in the Naryn-Kala citadel(2019) Abiev, A.; Bagulya, A.; Chernyavskiy, M.; Dashkina, A.; Grachev, V.; Polukhina, N.; Грачев, Виктор Михайлович; Полухина, Наталья Геннадьевна© 2019 by the authors.The paper presents the test experiment to investigate one of UNESCO's (United Nations Educational, Scientific and Cultural Organization) world heritage objects, an archaeological site in the Naryn-Kala citadel (Derbent, Republic of Dagestan, Russian Federation) hidden under the ground's surface. The function of the site could be revealed by the muon radiography studies. Several nuclear emulsion detectors were exposed for two months inside the site at a depth about 10 m from the modern surface. The use of nuclear emulsions as probing radiation detectors combined with the potential of modern image analysis methods provides for a uniquely high resolution capacity of recording instrumentation and 3D reconstruction of the internal structure of the investigated object. Here we present the experiment and data analysis details and the first results.
- ПубликацияОткрытый доступMeasurement of the muon flux from 400 GeV/c protons interacting in a thick molybdenum/tungsten target(2020) Ahdida, C.; Akmete, A.; Albanese, R.; Alexandrov, 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 for the benefit of the SHiP collaboration.The SHiP experiment is proposed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. About 10 11 muons per spill will be produced in the dump. To design the experiment such that the muon-induced background is minimized, a precise knowledge of the muon spectrum is required. To validate the muon flux generated by our Pythia and GEANT4 based Monte Carlo simulation (FairShip), we have measured the muon flux emanating from a SHiP-like target at the SPS. This target, consisting of 13 interaction lengths of slabs of molybdenum and tungsten, followed by a 2.4 m iron hadron absorber was placed in the H4 400 GeV/c proton beam line. To identify muons and to measure the momentum spectrum, a spectrometer instrumented with drift tubes and a muon tagger were used. During a 3-week period a dataset for analysis corresponding to (3.27±0.07)×1011 protons on target was recorded. This amounts to approximatively 1% of a SHiP spill.
- ПубликацияОткрытый доступLatest results of the OPERA experiment on nu-tau appearance in the CNGS neutrino beam(2019) Agafonova, N.; Alexandrov, A.; Anokhina, A.; Aoki, S.; Polukhina, N.; Полухина, Наталья Геннадьевна© 2019 American Physical Society. All rights reserved.OPERA is a long-baseline experiment designed to search for νμ → ντ oscillations in appearance mode. It was based at the INFN Gran Sasso laboratory (LNGS) and took data from 2008 to 2012 with the CNGS neutrino beam from CERN. After the discovery of ντ appearance in 2015, with 5.1σ significance, the criteria to select ντ candidates have been extended and a multivariate approach has been used for events identification. In this way the statistical uncertainty in the measurement of the oscillation parameters and of ντ properties has been improved. Results are reported.