Персона:
Сорокин, Иван Александрович

Организационные подразделения

Организационная единица

Институт лазерных и плазменных технологий

Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.

Фамилия

Сорокин

Имя

Иван Александрович

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Теперь показываю 1 - 10 из 21

Только метаданные
Built-In Surface Analyzer for Plasma Devices with Magnetic Field
(2019) Bulgadaryan, D. G.; Sinelnikov, D. N.; Sorokin, I. A.; Kurnaev, V. A.; Efimov, N. E.; Синельников, Дмитрий Николаевич; Сорокин, Иван Александрович; Ефимов, Никита Евгеньевич
© 2019, Pleiades Publishing, Ltd.The erosion and redeposition processes of plasma-facing materials in fusion devices are the most important factors affecting near-wall and core plasma parameters and device lifetime. To determine the possibility of in situ analyzing these processes, we developed an experimental model of a built-in surface analyzer utilizing low-energy proton scattering spectroscopy. The results of experimental approbation of the method are presented.
Только метаданные
Self-Oscillating Mode of a Probe with Increased Secondary Emission for Nonequilibrium Plasma Diagnostics
(2019) Vizgalov, I. V.; Gutorov, K. M.; Kurnaev, V. A.; Sorokin, I. A.; Гуторов, Константин Михайлович; Сорокин, Иван Александрович
© 2019, Pleiades Publishing, Ltd.A method of ion saturation current measurement in a nonequilibrium plasma by a self-oscillating voltage sweep on the probe is described. The generation of voltage pulses is possible if a high secondary electron emission from the probe surface is ensured, significantly exceeding unity at a moderate negative potential. The theoretical basis of the self-oscillating probe method has been considered, which made it possible to describe the ways for controlling the repetition rate and pulse amplitude and the effect of plasma parameters on the shape of current and voltage signals. It is shown that the features of the phase trajectory of the signal from the probe on the (U, I) plane allow one to determine the reference points of instantaneous probe characteristic, in particular, the ion saturation current. The results of experiments on testing the self-oscillating probe technique, which were carried out using the PR-2 plasma-beam facility, are presented.
Только метаданные
A new compact linear beam-plasma discharge simulator BPD-PSI
(2022) Sergeev, N. S.; Sorokin, I. A.; Podolyako, F. S.; Сергеев, Никита Сергеевич; Сорокин, Иван Александрович; Подоляко, Федор Сергеевич
A new BPD-PSI line-type plasma simulator is introduced. The device features two vacuum units: a target unit and an electron gun unit, connected to each other by a water-cooled electron beam transport channel. The Pierce-type electron gun is used to generate stationary or pulsed electron beam, utilized for beam-plasma discharge generation. The plasma electron density can be varied in the range of n e = 1 × 1016 - 1 × 1018 m-3 with electron temperature in the range of T e = 1-20 eV. The ion flux of 1 × 1021 m-2 s-1 and heat fluxes up to 5 MW m-2 are obtained. A set of utilized plasma and plasma-surface interaction diagnostics are described. Five demonstration experiments are presented: 1) high vs low power beam-plasma operation, 2) beam-plasma discharge with/without presence of an external magnetic field, 3) incident ion flux composition analysis, 4) incident ion energy distribution function measurement, 5) in-situ target surface temperature control and in-vacuo thermal desorption spectroscopy measurement. All of the technical features of the setup described in this paper make it a new tool for studying plasma-surface interactions. © 2022 IOP Publishing Ltd and Sissa Medialab.
Только метаданные
Etching of "Microwire-on-Insulator"-Type Structures
(2022) Shustin, E. G.; Kolodko, D. V.; Luzanov, V. A.; Mirgorodskaya, E. N.; Sorokin, I. A.; Колодко, Добрыня Вячеславич; Сорокин, Иван Александрович
Только метаданные
Tungsten fuzz annealing effect on deuterium retention in polycrystalline tungsten
(2022) Kanashenko, S.; Harutyunyan, Z.; Ogorodnikova, O. V.; Gasparyan, Y.; Efimov, V.; Sorokin, I.; Sergeev, N.; Арутюнян, Зорий Робертович; Огородникова, Ольга Вячеславовна; Гаспарян, Юрий Микаэлович; Ефимов, Виталий Сергеевич; Сорокин, Иван Александрович; Сергеев, Никита Сергеевич
© 2022 Elsevier B.V.Using a beam-plasma discharge device operating on helium (He), tungsten with the fuzz on the surface (Wf) has been formed by irradiating polycrystalline tungsten (W) samples with He ions with an energy of ∼150 eV and the fluence of ∼6 × 1024 He/m2 at the temperature of 1273 K. The deuterium (D) retention in Wf annealed at different temperatures was studied by thermal desorption spectroscopy (TDS). Before and after annealing at temperatures of 1000,1200,1400 and 1600 K, Wf was irradiated at room temperature by 2 keV D3+(667 eV/D) ions with the fluence of 1021 D/m2, then in-situ TDS was performed after each irradiation. Annealing W above 1200 K clearly changes the retention mechanism of D: the TDS spectrum consisting of multiple peaks changes to an almost single-peak spectrum. Annealing at 1600 K leads to surface smoothing and the decrease of the D retention by a factor of two compared to the annealing at 1000 K. This can be explained by an increase of the reflection coefficient for the flat W surface. However, the D retention in Wf is significantly higher compared to that in W without He plasma exposure even after annealing at 1600 K, because there are still He bubbles in Wf that effectively trap D
Только метаданные
Numerical Simulation of the Instability of the Current between Plasma and a High Emissivity Surface
(2022) Sorokin, I. A.; Сорокин, Иван Александрович
Только метаданные
Plasma behavior in e×h pulse discharge
(2020) Rohmanenkov, A.; Solodovnikov, A.; Mamedov, N.; Maslennikov, S.; Sorokin, I.; Kolodko, D.; Мамедов, Никита Вадимович; Масленников, Сергей Павлович; Сорокин, Иван Александрович; Колодко, Добрыня Вячеславич
© 2020 IEEE.The paper presents the results of experiments and PIC (particle-in-cell) simulations of ignition characteristics of miniature pulsed penning ion source. Also the dependence of the discharge current pulse on the gas pressure and magnetic field are presented. Plasma behavior (electron and ion density in axial and radial dimensional) depending on magnitude (and configuration) of the magnetic field and pressure (working gas is deuterium) was shown.
Только метаданные
Measurements of secondary electron emission yield in the linear plasma simulator BPD-PSI
(2023) Sorokin, I. A.; Sergeev, N. S.; Сорокин, Иван Александрович; Сергеев, Никита Сергеевич
Только метаданные
Deuterium to protium isotope exchange in W-D co-deposited films below 200°C
(2023) Krat, S.; Prishvitsyn, A.; Fefelova, E.; Popova, M.; Sorokin, I.; Gasparyan, Y.; Pisarev, A.; Крат, Степан Андреевич; Пришвицын, Александр Сергеевич; Сорокин, Иван Александрович; Гаспарян, Юрий Микаэлович; Писарев, Александр Александрович
Только метаданные
Planar hollow cathode sputtering with asymmetrical voltage supply
(2023) Sorokin, I. A.; Kolodko, D. V.; Сорокин, Иван Александрович; Колодко, Добрыня Вячеславич
This article studies a planar hollow cathode discharge (HCD) with an asymmetric negative potential applied to parallel cathodes. The hollow cathode effect is preserved when an additional high voltage bias is applied to one of cathodes. For the argon pressures of 15, 20 and 60 Pa, the current-voltage characteristics of the HCD were obtained with an extra bias voltage applied on the iron cathode/target. The paper describes the sputtering system based on a HCD, consisting of two cathodes: a flat target and a tungsten mesh located at a distance of 7 mm, through which the deposited material passes. At the argon pressure of 40 Pa, the dynamics of the local plasma parameters and the iron deposition rate on a substrate under floating potential located at a distance of 40 mm from the grid were measured. The asymmetrical voltage supply in hollow cathode sputtering lead to a significant increase in the iron sputtering rate (from 2 to 16 nm/min), which is associated with both an increase in the plasma density and the sputtering coefficient of the target material. Sputtering system based on a planar HCD is advantageous due to the absence of magnetic field, which facilitates deposition of soft magnetic materials. © 2022 Elsevier Ltd