Персона: Каримов, Александр Рашатович
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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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Александр Рашатович
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- ПубликацияОткрытый доступThe influence of velocity field on simple chemical reactions in viscous flow(2019) Taleisnik, M. A.; Savenkova, T. V.; Aksenova, L. M.; Karimov, A. R.; Каримов, Александр РашатовичThe paper looks at the nonlinear dynamics of viscous flow in a compressible spatially homogeneous fluid with chemical reactions. Time-dependent exact solution of the Piseuille type is obtained. Proceeding from this solution, the influence of a viscosity effect and a chemical reaction on the characteristics of nonequilibrium temporal states of the system is considered. Special attention is drawn to the effect of density collapses on the development of chemical reactions.
- ПубликацияОткрытый доступThe Use of Interplanetary Medium as Fuel for Plasma Thrusters(2019) Murad, P. A.; Karimov, A. R.; Yakovlev, O. V.; Каримов, Александр Рашатович© Published under licence by IOP Publishing Ltd.Consuming long-range interplanetary medium as a fuel for driving plasma thrust is crucial. The methods of capturing the space environment depending on its density and the ship velocity are critical issues. The possible ways of creating ionization for neutral fluxes as a function of the solar radiation flux are also analyzed as a potential propellant. These processes define the permissible type of the plasma source. These options look extremely promising where a low thrust device continuously operating, could possibly deliver a celestial target close to the speed of light. Under such conditions at a considerable distance, the density of such material diminishes and it may be impossible to maintain a continuous operation mode of the plasma thruster but instead operate as a pulsed engine which might potentially be workable.
- ПубликацияТолько метаданныеUse of Plasma Flows to Clean the Near-Earth Space(2021) Yamshchikov, V. A.; Karimov, A. R.; Terekhov, S. A.; Shikanov, A. E.; Каримов, Александр Рашатович; Терехов, Святослав Алексеевич; Шиканов, Александр Евгеньевич© 2021, Pleiades Publishing, Ltd.Abstract: A system for cleaning near-Earth space from space debris in the upper layers of the atmosphere is proposed, which is based on a plasma accelerator that uses the medium of the upper layers of the atmosphere and solar radiation to generate plasma flows of the required intensity. Estimates of the main material and energy characteristics of the system were obtained, which demonstrate the feasibility of the proposed device.
- ПубликацияОткрытый доступResearch of a pulse magnetic system for eliminating electron conductivity in an ion diode for the neutron generation(2020) Vovchenko, E. D.; Karimov, A. R.; Kozlowskii, K. I.; Lisovskii, M. I.; Rashchikov, V. I.; Shikanova, A. E.; Вовченко, Евгений Дмитриевич; Каримов, Александр Рашатович; Козловский, Константин Иванович; Ращиков, Владимир Иванович© Published under licence by IOP Publishing Ltd.The work presents the results of modeling the process of suppressing an electronic component in a small-sized coaxial ion diode by a pulsed magnetic field of a spiral electrodynamic line. Information was obtained on the features of this process, which is necessary for designing a diode with pulsed magnetic insulation.
- ПубликацияТолько метаданныеCollective Acceleration of Ions in a Pulsed Magnetic Field of a Conical Spiral(2019) Vovchenko, E. D.; Kozlovskij, K. I.; Shikanov, A. E.; Karimov, A. R.; Isaev, A. A.; Plekhanov, A. A.; Deryabochkin, O. V.; Вовченко, Евгений Дмитриевич; Козловский, Константин Иванович; Шиканов, Александр Евгеньевич; Каримов, Александр Рашатович; Плеханов, Андрей Александрович; Дерябочкин, Олег Владимирович© 2019, Pleiades Publishing, Ltd.The collective acceleration of laser plasma ions in a magnetic field generated by a powerful fast-growing current pulse in a low-inductive conical spiral is studied. The velocity of ions for a number of elements which significantly differ in atomic weight are obtained on the basis of collector measurements. The maximum velocity of both light (lithium) and heavy (lead) ions exceed the value of 108 cm/s; for ions of lead, the corresponding energy amounts to a value of ∼1 MeV. A mathematical model of ion acceleration is proposed and simulation results are compared with the experiment.
- ПубликацияТолько метаданныеAcceleration of Dusty Plasma Flow in Azimuthal Electric and Radial Magnetic Fields(2020) Karimov, A. R.; Terekhov, S. A.; Shikanov, A. E.; Каримов, Александр Рашатович; Терехов, Святослав Алексеевич; Шиканов, Александр Евгеньевич© 2020, Pleiades Publishing, Ltd.Abstract: In the framework of the model of cold hydrodynamics, acceleration of the flow of dusty plasma in azimuthal electric and radial magnetic fields has been studied. The obtained results show that there are conditions under which macroscopic particles are captured and accelerated by the plasma flow.
- ПубликацияТолько метаданныеCompact Induction Accelerator of Laser Plasma for Ion Energy up to 1 MeV(2020) Vovchenko, E. D.; Kozlovskij, K. I.; Shikanov, A. E.; Karimov, A. R.; Rashchikov, V. I.; Shatokhin, V. L.; Isaev, A. A.; Deryabochkin, O. V.; Вовченко, Евгений Дмитриевич; Козловский, Константин Иванович; Шиканов, Александр Евгеньевич; Каримов, Александр Рашатович; Ращиков, Владимир Иванович; Шатохин, Вадим Леонидович; Дерябочкин, Олег Владимирович© 2020, Pleiades Publishing, Ltd.Abstract: The collective acceleration of laser plasma ions in a rapidly increasing magnetic field (108 T/s) excited by a powerful current pulse in a low-inductive conical spiral expanding in the direction of plasma acceleration has been studied. A mathematical model and an algorithm for calculating the radial Br and axial Bz components of the magnetic field in the approximation of a conical spiral by a system of rings of variable radius are proposed to analyze the factors affecting the efficiency of such acceleration. Based on computer modeling and an experimental variation of magnetic-field excitation parameters, the regime of effective ion acceleration is obtained. With the help of time-of-flight collector measurements, the velocities of ions whose atomic mass differs by two orders of magnitude are determined. The maximum velocity of both light ions (lithium) and heavy ions (lead) exceeds 106 m/s, and the corresponding energy for lead ions is ~1 MeV. The efficiency of collective acceleration with the direct acceleration of laser plasma ions in a high-current high-voltage diode with magnetic insulation is compared.
- ПубликацияОткрытый доступMECHANISMS OF DESTRUCTION AND SYNTHESIS OF LIQUID MEDIA, USED IN THE FOOD INDUSTRY UNDER NON-EQUILIBRIUM CONDITIONS(2019) Savenkova, T. V.; Karimov, A. R.; Каримов, Александр Рашатович; Kondratev, N. B.; Gerasimov, T. V.; Taleysnik, M. A.The formation of food liquid medium structures containing at least 70 % of disperse particles with high dispersiveness has been considered. The possible formation mechanisms of food liquid medium structure when slow (hydrodynamic) and quick (acoustic) processes create favorable conditions for cavitation have been studied. The possibility to control these processes for initiation of mechanical and kinetic reactions that change the structure of the medium has been demonstrated. The invert syrup has been selected as the study object. The change in the invert syrup structure before and after such cavitation treatment has been recorded with the use of metallographic microscope Nikon Eclipse MA100. The decrease in disperse phase sizes from 2–3 Вµm to 0.1–0.4 Вµm along with establishing the high uniformity of component distribution as compared to the syrup without cavitation process treatment has been detected.
- ПубликацияТолько метаданныеElectrophysical Means in Space Research and Applications for the near-Earth Space(2021) Murad, P. A.; Yamschikov, V.; Karimov, A. R.; Terekhov, S. A.; Каримов, Александр Рашатович; Терехов, Святослав Алексеевич© 2021, American Institute of Aeronautics and Astronautics Inc.. All rights reserved.The paper discusses the use of the interplanetary substance as a possible fuel for spacecraft’s plasma thrusters for interplanetary flights and the possibility of creation the electrodynamic space debris collection system in the upper atmosphere based on a plasma propulsor using the upper atmosphere medium and solar radiation to create plasma flows of the required intensity. The intensity is such that the debris is used for propellant as well as storage of the space debris. Moreover, the device would use a magnetic field to convert linear momentum of the debris into angular momentum for capture. Estimates of the basic material and energy characteristics of this state-of-the art system are obtained, which demonstrate the technical feasibility of the proposed device. Furthermore, the accelerator may also use plasma with motion of some of the debris as propellant.
- ПубликацияТолько метаданныеAcceleration of Macroscopic Clusters in Crossed Magnetic Fields(2019) Karimov, AlexanderR.; Shikanov, AlexanderE.; Murad, PaulA.; Terekhov, SvyatoslavA.; Каримов, Александр Рашатович; Шиканов, Александр Евгеньевич; Терехов, Святослав АлексеевичThe acceleration of rotating plasma flow in crossed magnetic fields produced momentum transfer between the macroscopic degrees of freedom for a plasma flow was investigated. Results implied a concept for acceleration of plasma flow containing the charged macroscopic particles. Here, the case is treated when the plasma flow consists of electrons, protons, and heavy, multiply charged negative dust particles only. The analysis shows that these charged macroscopic particles have been trapped and, then, accelerated in the main plasma flow. As a result, such complex plasma flow can be accelerated in one axial direction to increase the thrust. It suggests that such complex plasma flow produced, for example, from cosmic dust medium may be used as a propellant and a work body for plasma thrusters.