2017_Взаимодействие ионов с поверхностью (ВИП)

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Zn ION IMPLANTED Si MODIFICATION BY SWIFT Xe ION IRRADIATION
(НИЯУ МИФИ, 2017) Privezentsev, V. V.; Skuratov, V. A.; Kulikauskas, V. S.; Makunin, A. V.; Ksenich, S. V.; Steinman, E. A.; Tereshchenko, A. N.; Скуратов, Владимир Алексеевич
The properties of metal nanoparticles (NPs) are comprehensively investigated because of its possible application in modern opto/microelectronic devices. Metal zinc NPs can be use in UV photo-detectors based on surface plasmon resonance phenomena [1]. There are a number of publications attempted to the formation of metal NPs by supersaturation of silicon with these metals. Among them there are works connected with formation of Zn NPs in Si ion implantation [2-4]. In recent years, there were much attention has been paid to the problems of creating combined microelectronics and photonics systems on silicon substrate. So silicon is non-direct semiconductor, it is not a convenient material for these purposes. The important task is the search for ways to synthesize NPs with a narrow size distribution. Swift heavy ion irradiation (SHI) beams allows selectivity to control the dimensions of formed NPs [5]. As known SHI irradiation lead to formation of so-called latent tracks (nanometer-sized disordered regions around ion trajectory) in many oxide crystals and corresponding track-associated radiation damage may induce the change of NP form from spherical to ellipsoidal. This effect is most noticeable for multiple (about 100 times) SHI impacts [6]. In this work the Zn nanoparticles were synthesized in Si by high-dose and low-energy Zn ion implantation. Then there was carried out the modification of implanted samples by high-energy Xe ion irradiation.
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LEIS ANALYSIS OF THE W SURFACE DURING WATER VAPOR ADSORPTION
(НИЯУ МИФИ, 2017) Mamedov, N. V.; Kurnaev, V. A.; Sinelnikov, D. N.; Kolodko, D. V.; Sorokin, I. A.; Мамедов, Никита Вадимович; Колодко, Добрыня Вячеславич; Синельников, Дмитрий Николаевич; Сорокин, Иван Александрович
The adsorption of water on the surface is one of the main problems in vacuum technology. Since water is a good adsorbent, its adsorption is the reason that prevents the fast pumping of vacuum systems up to ultra-high vacuum. In addition, water vapor adsorption on metal surfaces during plasma surface interaction is a problem [1]. Singly scattered and recoil ions could form narrow peaks in energy spectra and provide information about atomic composition of the first atomic layer giving information about structure and composition of the surface and very sensitivity to the first layer of atoms [2 -5]. It was also shown [6] that the thickness of light element thin layers on the heavy substrate can be analyzed with good depth resolution (~0,3nm) due to scattering of hydrogen ions with keV energies. Application of ion scattering spectroscopy at pressures up to several mTorr is presented in [7, 8]. In this work experimental results of low energy ion spectroscopy (LEIS) of W samples during water vapor adsorption are presented.
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ИССЛЕДОВАНИЕ ЭВОЛЮЦИИ ЭЛЕКТРОННЫХ СВОЙСТВ НАНОКЛАСТЕРНЫХ ПЛЕНОК НА ОСНОВЕ МЕТАЛЛОВ Ta И Mo, СФОРМИРОВАННЫХ С ПОМОЩЬЮ МЕТОДА МАГНЕТРОННОГО РАСПЫЛЕНИЯ
(НИЯУ МИФИ, 2017) Васильев, О. С.; Борисюк, П. В.; Козлова, Т. И.; Лебединский, Ю. Ю.; Борисюк, Петр Викторович; Лебединский, Юрий Юрьевич; Козлова, Татьяна Ивановна; Васильев, Олег Станиславович
The results of the study of electron properties evolution of monodisperse thin films consisted of Ta and Mo metal nanoclusters deposited onto the SiO2/Si(001) surface with magnetron sputtering method are presented. The changes in chemical composition and electron structure of the samples were controlled by means of X-ray photoelectron spectroscopy in the UHV analysis chamber of the Multiprobe MXPS RM VT AFM-25 surface analysis system. Susceptibility to oxidation after exposure to atmosphere was studied.
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HYDROGEN AND HELIUM RETENTION IN TUNGSTEN UNDER ION IRRADIATION
(НИЯУ МИФИ, 2017) Gasparyan, Yu.; Zibrov, M.; Efimov, V.; Ryabtsev, S.; Ogorodnikova, O.; Pisarev, A.; Писарев, Александр Александрович; Гаспарян, Юрий Микаэлович; Огородникова, Ольга Вячеславовна
Interaction of helium and hydrogen ions with tungsten is intensively investigated during last decades in relation to construction of fusion reactor. Tungsten has the high melting temperature and the energy threshold for sputtering and, therefore, is considered as plasma facing material (PFM) in fusion devices in the area of largest heat loads and small energies of ions (divertor area). In particular, tungsten will be used in the international experimental reactor ITER, which is now under construction.
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ЗАХВАТ И ДЕСОРБЦИЯ ВОДОРОДА ИЗ ВОЛЬФРАМА С ПЛЕНКАМИ ОКСИДОВ БЕРИЛЛИЯ/АЛЮМИНИЯ ПРИ ОБЛУЧЕНИИ ПЛАЗМОЙ
(НИЯУ МИФИ, 2017) Беграмбеков, Л.; Каплевский, А.; Евсин, А.; Довганюк, С.; Захаров, А.; Захаров, Андрей Михайлович; Беграмбеков, Леон Богданович; Евсин, Арсений Евгеньевич; Довганюк, Сергей Сергеевич
The aim of this work is to check whether the phenomenon of accelerated hydrogen penetration through the surface (APS) occurs on tungsten surface and surface of tungsten covered wit beryllium/aluminum layers. It is shown that APS phenomenon takes plays on the all above mentioned surfaces. А new technique for low temperature detritiation of tungsten and tungsten with beryllium layer in conditions of fusion devices is presented.
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УДАЛЕНИЕ ДЕЙТЕРИЯ, ВНЕДРЁННОГО В ГРАФИТ, ПРИ ПОСЛЕДУЮЩЕМ ОБЛУЧЕНИИ ИОНАМИ ВОДОРОДНОЙ ПЛАЗМЫ
(НИЯУ МИФИ, 2017) Айрапетов, А. А.; Беграмбеков, Л. Б.; Довганюк, С. С.; Каплевский, А. С.; Айрапетов, Алексей Александрович; Довганюк, Сергей Сергеевич; Беграмбеков, Леон Богданович
The paper investigates peculiarities of deuterium removal implanted into graphite by subsequent irradiation with hydrogen plasma ions. It is shown that irradiation with 50-eV hydrogen ions leads to desorption of deuterium previously implanted with energies 100 and 650 eV. The fraction of deuterium remaining in graphite decreases with the increase of hydrogen irradiation dose. The amount of deuterium in graphite stays constant after multiple cycles of consequent irradiation. Conclusion is made that low energy irradiation with hydrogen ions can be used as a method of low temperature graphite degassing.
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ОБРАЗОВАНИЕ СПЛОШНЫХ ГИДРИДОВ В ОБОЛОЧКЕ ТВЭЛ
(НИЯУ МИФИ, 2017) Девятко, Ю. Н.; Новиков, В. В.; Хомяков, О. В.; Хомяков, Олег Владимирович
Formation mechanism of massive hydrides in irradiated zirconium cladding is established. It is shown that the duration of formation process is defined by a period of time up to destruction of oxide film on the internal surface of fuel cladding. The time required for massive hydride to grow through the thickness of zirconium cladding is established.
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ANGULAR DISTRIBUTION OF W SPUTTERED BY LOW ENERGY AR
(НИЯУ МИФИ, 2017) Sorokin, I.; Marenkov, E.; Nordlund, K.; Eksaeva, A.; Маренков, Евгений Дмитриевич; Сорокин, Иван Александрович
Sputtering of the first wall tokamak materials by low energy of the order of 100 eV but high fluxes, 1020 cm-2s-1 is one of the main mechanisms responsible for steady-state first wall erosion. At such low energies sputtering occurs due to few-collision cascades. The resulting angular and energy distributions of sputtered particles are different from cosine and Thompson distributions predicted by kinetic theory of cascades valid at larger energies. Experimental data on the distributions for materials and energies of interest are scarce [1]. At the same time experiments at linear plasma devices demonstrated that the distributions play a substantial role in comprehension of the sputtered particles transport in plasma [2]. In this work we develop an experimental procedure for direct measurements of the angular distributions of the sputtered particles and a method for molecular dynamics calculation of them. The proposed simulation procedure accurately accounts for polycrystalline structure of the samples.
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CORRELATION OF DEUTERIUM RETENTION WITH CRYSTALLINE STRUCTURE IN DENSE AND DISORDERED TUNGSTEN COATINGS
(НИЯУ МИФИ, 2017) Ogorodnikova, O. V.; Ruset, C.; Dellasega, D.; Pezzoli, A.; Passoni, M.; Sugiyama, K.; Gasparyan, Yu.; Efimov, V.; Ефимов, Виталий Сергеевич; Гаспарян, Юрий Микаэлович; Огородникова, Ольга Вячеславовна
Dense nano-structured tungsten (W) coatings are used as plasma-facing materials in current tokamaks and thick coatings are suggested to be used also for the future fusion devices, ITER and DEMO. In this study, deuterium (D) retention in various W coatings was investigated to understand dependences of the D retention on the crystalline structure of each W coating and on the substrate material.
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EXCITATION OF THE ELECTRONIC SYSTEM OF SUBSURFACE LAYERS OF TIO2 IRRADIATED WITH SWIFT HEAVY IONS
(НИЯУ МИФИ, 2017) Rymzhanov, R. A.; Medvedev, N. A.; Volkov, A. E.
A swift heavy ion (SHI, E=1-10 MeV/nucl) penetrating through a solid deposits the largest part of its energy into the electronic subsystem of the target. Further kinetics of lattice excitation in the nanometric vicinity of the ion trajectory (ion track) depends crucially on achieved parameters of the disturbed electronic system.
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ОПТИМИЗАЦИЯ ПАРАМЕТРОВ ЛЕГИРОВАНИЯ АТОМАМИ ПЛЕНОК Al, Fe, Mo НА ПОВЕРХНОСТИ ОБРАЗЦОВ СПЛАВОВ ЦИРКОНИЯ ПОД ОБЛУЧЕНЕМ ПУЧКОВ ИОНОВ АРГОНА
(НИЯУ МИФИ, 2017) Сафонов, Д. А.; Яшин, А. С.; Волков, Н. В.
Известно, что ионная бомбардировка пленок, нанесенных на поверхность массивного образца – подложки позволяет вводить в приповерхностный слой подложки на глубины до единиц мкм. При этом для повышения эффективности внедрения атомов из нанесенных пленок необходимо снижать скорость распыления пленок и стремиться увеличить внедрение атомов в подложку на значительные глубины с концентрациями выше предела растворимости за счет радиационно-стимулированных процессов.
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01_Том 3_XXIII Международная конференция Взаимодействие ионов с поверхностью «ВИП – 2017»
(НИЯУ МИФИ, 2017)
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РАСПЫЛЕНИЕ МОНОКРИСТАЛЛОВ КРЕМНИЯ ПОД ВОЗДЕЙСТВИЕМ ПУЧКОВ ИОНОВ ГЕЛИЯ И АРГОНА СО СРЕДНЕЙ ЭНЕРГИЕЙ 10 КЭВ
(НИЯУ МИФИ, 2017) Волков, Н. В.; Сафонов, Д. А.
In this paper the peculiarities of formation of the surface topography caused by the diffusion of single-crystal Si substrate of different orientation with evaporated thin films under the irradiation by Ar+ and He+ ion beams with a wide energy spectrum.
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01_Том 2_XXIII Международная конференция Взаимодействие ионов с поверхностью «ВИП – 2017»
(НИЯУ МИФИ, 2017)
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HYDROGEN CO-DEPOSITION WITH METALS IN PLASMA DISCHARGE
(НИЯУ МИФИ, 2017) Krat, S. A.; Gasparyan, Yu. M.; Vasina, Ya. A.; Pisarev, A. A.; Писарев, Александр Александрович; Крат, Степан Андреевич; Гаспарян, Юрий Микаэлович
Deposition of a single element film is always accompanied by co-deposition of a certain amount of other elements. This can be done properly to improve properties of the coating or due to contamination by impurities. In the field of thermonuclear fusion research, where hydrogen isotopes are used as a fuel, co-deposition with sputtered material from the wall is one of major mechanisms of hydrogen isotopes accumulation in the installation. Since D-T fuel will be used in ITER and future fusion reactors, accumulation of radioactive tritium will limit the lifespan of the installations due to safety concerns. For example, tritium accumulation in ITER is limited by 1 kg. This is why carbon materials were not accepted for the use in ITER. Basing on experiments, it was predicted that the safety limit could be reached after 100 of shots with tritium. Recent experiments in JET [1] demonstrated in the case of “ITER-like” wall (first wall – Be, divertor area - tungsten) accumulation of deuterium fuel in the co-deposits was 20 times lower than in the full-carbon wall campaign. This is both due to smaller amount of co-deposits and smaller concentration of deuterium in them.
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DEUTERIUM RE-EMISSION AND THERMAL DESORPTION FROM IRON AND EUROFER
(НИЯУ МИФИ, 2017) Ryabtsev, S. A.; Gasparyan, Yu. M.; Ogorodnikova, O. V.; Harutyunyan, Z. R.; Pisarev, A. A.; Арутюнян, Зорий Робертович; Огородникова, Ольга Вячеславовна; Писарев, Александр Александрович; Гаспарян, Юрий Микаэлович
Reduced-activation ferritic-marthensitic (RAFM) steels, such as Eurofer, are considered as candidates for structural materials in fusion reactors due to the high thermal conductivity, the low thermal expansion coefficient and good resistance to radiation swelling. There are also some concepts of fusion reactors, where RAFM steels also considered as material for plasma-facing components. In this regard, the key aspects of hydrogen (H) isotopes interaction with RAFM steels, such as tritium (T) retention and migration in these materials are particularly important as a point of safety concern.
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PULSED ABNORMAL GLOW DISCHARGE WITH HOLLOW CATHODE FOR NITRIDING OF INTERNAL CYLINDRICAL SURFACES
(НИЯУ МИФИ, 2017) Borisyuk, Yu. V.; Kozlova, V. V.; Mozgrin, D. V.; Oreshnikova, N. M.; Stepanova, T. V.; Pisarev, A. A.; Писарев, Александр Александрович
Plasma nitriding is a method of thermochemical treatment, which is widely used to enhance surface hardness, fatigue strength, and corrosion resistance of steels [1,2]. In industry, glow discharge is commonly used for this purpose. A specific task of plasma technologies is treating of cavities, which are usually inaccessible for plasma. Still, the need to modify cavities and tubes of small diameters and large aspect ratios exists. Abnormal glow discharge with hollow cathode in the pulse-periodic mode was proposed for this purpose in [3]. This work is devoted to investigation of ignition and properties of the abnormal glow discharge in tubes and demonstration of nitriding of internal surfaces of the tubes.
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IMPROVED RADIATION RESISTANCE IN EQUIATOMIC MULTICOMPONENT SINGLE PHASE ALLOYS
(НИЯУ МИФИ, 2017) Djurabekova, F.; Granberg, F.; Zhang, S.; Nordlund, K.; Weber, W. J.; Zhang, Y.
The conventional metals are well-ordered crystal structures, with additional elements mixed in at small concentrations. A conceptually new way of making to mix numerous (three to seven) different types of metal atoms at completely random positions in equal concentrations, while still retaining a single crystalline phase. In these, so called equiatomic or high-entropy alloys, the atoms are thus completely disordered in position.
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01_Том 1_XXIII Международная конференция Взаимодействие ионов с поверхностью «ВИП – 2017»
(НИЯУ МИФИ, 2017)
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АНАЛИЗ ВЛИЯНИЯ ИОННО-КЛАСТЕРНОЙ ОБРАБОТКИ НА СОСТОЯНИЕ ПОВЕРХНОСТИ ОПТИЧЕСКОЙ СТЕКЛОКЕРАМИКИ МЕТОДОМ ФЛИККЕР- ШУМОВОЙ СПЕКТРОСКОПИИ
(НИЯУ МИФИ, 2017) Бакун, А. Д.; Гусев, А. С.; Каргин, Н. И.; Матющенко, И. А.; Тимашев, С. Ф.; Каргин, Николай Иванович; Гусев, Александр Сергеевич; Тимашев, Сергей Федорович; Бакун, Алексей Дмитриевич
A method of parameterization of supersmooth surfaces used in micro- and nanoelectronics as substrates and light-reflecting elements is proposed. The method is based on the flicker-noise spectroscopy (FNS) as the general phenomenological approach to extracting information from the chaotic temporal or spatial signals. The glass-ceramic samples were processed by cluster-ion beams and their topology was investigated by atomic force microscopy before and after treatment. It is established that gas cluster ion beams processing of glass ceramics leads to angstrom-level surface roughness.