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Лисица, Валерий Степанович

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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.

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Валерий Степанович

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Теперь показываю 1 - 10 из 30

Только метаданные
Analysis of Unsteady Charge Kinetics of Helium in the Initial Phase of Plasma Discharge in LHD
(2025) Nagel, N. N.; Lisitsa, V. S.; Shurygin, V. A.; Лисица, Валерий Степанович
Только метаданные
Radiative Losses of Deuterons, Tritons, and Alpha Particles on Tungsten Ions in the Plasma of the ITER and EU-DEMO Tokamaks
(2023) Mavrin, A. A.; Demura, A. V.; Leont’ev, D. S.; Lisitsa, V. S.; Лисица, Валерий Степанович
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ПОЛЯРИЗАЦИОННАЯ ХАРАКТЕРИСТИКА СПЕКТРА ВОДОРОДА В MSE-ДИАГНОСТИКЕ
(НИЯУ МИФИ, 2024) ДЕМУРА, А. В.; ЛЕОНТЬЕВ, Д. С.; ЛИСИЦА, В. С.; Лисица, Валерий Степанович
В рамках теоретических исследований спектра водорода для MSE диагностики получены отношения интенсивностей различных штарковских компонент линии Hα. Определены зависимости поляризационной характеристики спектра от плотности плазмы и от угла между линией наблюдения и индуцированным электрическим полем.
Только метаданные
Thomson scattering in plasmas: Theory generalization for ultrashort laser pulse effects
(2020) Astapenko, V. A.; Khramov, E. S.; Rosmej, F. B.; Lisitsa, V. S.; Лисица, Валерий Степанович
© 2020 Author(s).The standard approach to calculate the Thomson scattering probability is reconsidered for the case of ultrashort incident laser pulses (USLPs). We established a new model for the interaction of USLP with plasmas that is based on Fermi's equivalent photon conception to calculate the spectral-angular differential Thomson scattering probability. The simulations demonstrate that the scattering probability for USLP is a non-monotonic function of pulse duration in contrast to the standard long-pulse model showing linear dependence. An analytical approach is developed to study the nonlinear behavior of the scattering probability as a function of pulse duration and other parameters.
Только метаданные
Stark-Zeeman and Blokhintsev Spectra of Rydberg Atoms
(2020) Letunov, A. Y.; Lisitsa, V. S.; Лисица, Валерий Степанович
The problem of Rydberg atomic spectra in crossed electric F and magnetic B fields (combined Stark-Zeeman effects), as well as an oscillating electric field are under consideration. The main problem is the great array of radiative transitions between the Rydberg atomic states. The different versions of semiclassical approaches are applied for the solution of the problem. New approximate selection rules are established to simplify the matrix elements of radiative transitions, making it possible to reduce the complex expressions of Gordon's hypergeometric series to the trivial trigonometric functions. Simple analytical formulas for the dipole matrix elements of a Rydberg hydrogen-like atom in external crossed electric and magnetic fields for H-n alpha are obtained. The specific calculations are presented for n = 10 to 9 transition both for parallel and perpendicular orientations of F-B fields. The result of Blokhintsev for a single Stark component in oscillating field is generalized for the array of radiative transitions between Rydberg atomic states. Such spectra with large values of modulation index are compared with static ones.
Только метаданные
Ballistic model of recycling of atomic and molecular hydrogen and its application to the ITER main chamber
(2021) Neverov, V. S.; Shurygin, V. A.; Kukushkin, A. B.; Kukushkin, A. S.; Lisitsa, V. S.; Pshenov, A. A.; Кукушкин, Александр Борисович; Лисица, Валерий Степанович
© 2021 IOP Publishing LtdA simple, computationally efficient 1D model is suggested for the recycling of atomic and molecular hydrogen between the main chamber first wall (FW) of a tokamak and the peripheral plasma. The model is based on iteratively solving the kinetic equation for the 1D velocity distribution function (VDF) of hydrogen neutral atoms in the projection of velocity on the direction normal to the FW. The model results in a fast-converging routine due to the domination of the contribution to the VDF from long-distance, ballistic flights of the neutral atoms produced by the charge exchange of colder atoms with hotter plasma ions. The proposed modification of the ballistic model (BM) enhances its original version along the following lines: the account of the inelastic reflections of the neutral atoms from the wall; parameterisation of the boundary condition for the VDF of the atoms produced by the reflection of ions from the wall with immediate recombination, without capture in the wall and thermalisation there; extension to a mixture of hydrogen isotopes; elaboration of algorithms for speeding up computation on graphical processing units. The complete set of equations of the BM is published for the first time. The model is verified by comparison with the EIRENE code simulations of the VDF of neutral atoms and molecules in the scrape-off-layer around mid-plane for typical conditions of ITER operation. The applicability of the BM to the synthetic diagnostics developed for the H-alpha high-resolution spectroscopy is demonstrated. That is, the simple 1D model reproduces reasonably well the 1D projection of the data computed with the 3D Monte-Carlo code on a 2D plasma background.
Только метаданные
Simulation of passive charge exchange signals of hydrogenlike beryllium ions for cxrs edge diagnostics in iter
(2020) Sdvizhenskii, P. A.; Levashova, M. G.; Neverov, V. S.; Romazanov, Y. A.; Kukushkin, A. B.; Lisitsa, V. S.; Кукушкин, Александр Борисович; Лисица, Валерий Степанович
© 2020 National Research Center Kurchatov Institute. All rights reserved.For one of the divertor's operation scenarios in ITER, the background radiation from passive charge exchange was calculated for one of the beryllium (Be IV) spectral lines used for Charge eXchange Recombination Spectroscopy (CXRS) diagnostics. The contribution of the charge exchange of beryllium ions Be V on neutral deuterium atoms in the ground and first excited states is calculated. The cross sections for the charge exchange reaction calculated by the numerical code ARSENY and other codes are used. The data from the ITER edge plasma modeling database is used based on the SOLPS numerical code: Calculations of the kinetics of deuterium recycling by the EIRENE code and the erosion of the beryllium first wall by the ERO2.0 code.
Только метаданные
ANALYSIS OF UNSTEADY CHARGE STATE KINETICS OF HELIUM IN THE STARTUP PHASE OF PLASMA DISCHARGE IN LHD АНАЛИЗ НЕСТАЦИОНАРНОИ ЗАРЯДОВОИ КИНЕТИКИ ГЕЛИЯ В НАЧАЛЬНОИ ФАЗЕ ПЛАЗМЕННОГО РАЗРЯДА В LHD
(2024) Nagel, N. N.; Lisitsa, V. S.; Shurygin, V. A.; Лисица, Валерий Степанович
Только метаданные
Algorithm of calculating the passive signal of tokamak edge plasma for CXRS diagnostics
(2019) Sdvizhenskii, P. A.; Levashova, M. G.; Neverov, V. S.; Serov, S. V.; Kukushkin, A. B.; Lisitsa, V. S.; Кукушкин, Александр Борисович; Лисица, Валерий Степанович
Только метаданные
Influence of Bundling of Atomic Levels on the Radiation Losses of Argon, Neon, and Nitrogen Ions in the Near-Wall Plasma
(2024) Kukushkin, A. B.; Levashova, M. G.; Lisitsa, V. S.; Sdvizhenskii, P. A.; Кукушкин, Александр Борисович; Лисица, Валерий Степанович