Персона: Мартиросян, Ирина Валерьевна
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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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Мартиросян
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Ирина Валерьевна
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- ПубликацияТолько метаданныеModeling of magnetization and levitation force of HTS tapes in magnetic fields of complex configurations(2019) Irina, Anischenko; Sergei, Pokrovskii; Igor, Rudnev; Osipov, Maxim; Мартиросян, Ирина Валерьевна; Покровский, Сергей Владимирович; Руднев, Игорь Анатольевич; Осипов, Максим АндреевичIn many levitation systems superconductors are used in combination with permanent magnets. In this paper we considered three types of magnetic assemblies that are most often used: with magnets oriented in one direction, oppositely oriented magnets and the Halbach array. Based on the H-formalism, we performed modeling of a magnetic field and levitation force in a system consisting of the high temperature superconductor (HTS) tape stack and the assembly of permanent magnets. It was shown that if a spatial distribution of a gradient magnetic field changes in height it is necessary to take into account the magnetic history of the superconductor. The proposed computational model includes a combination of scalar and vector potentials, as well as modeling the real movement of an HTS tape stack in a levitation system. The simulation results were verified by corresponding experiments. The proposed approach is universal for modeling levitation systems of complex configurations.
- ПубликацияТолько метаданныеMagnetometry Diagnostics of Defects in High-Temperature Superconducting Tapes in a Gradient Magnetic Field(2019) Podlivaev, A. I.; Pokrovskii, S. V.; Anishchenko, I. V.; Rudnev, I. A.; Подливаев, Алексей Игоревич; Покровский, Сергей Владимирович; Мартиросян, Ирина Валерьевна; Руднев, Игорь Анатольевич© 2019, Pleiades Publishing, Ltd. Abstract: A new technique for contactless magnetometric determination of the local critical current in high-temperature superconducting tapes is proposed. In contrast to conventional approaches, where currents in a superconductor are induced by a uniform magnetic field of an external source, in our variant the tape is magnetized by a series of bipolar permanent magnets. It is shown that, for solving a number of technical problems of defect diagnostics, the proposed approach is more effective than those used earlier. Two variants of diagnostics are discussed. The first variant is intended for express diagnostics of local defects (first of all, transverse cracks) in a separate tape and in a tape stack and the second variant is developed for the case of a smooth critical current variation in a separate tape. The proposed method can significantly improve the accuracy of determining the local critical current density.
- ПубликацияТолько метаданныеThe influence of cryogenic temperature on characteristics of superconducting maglev systems(2019) Osipov, M.; Starikovskii, A.; Abin, D.; Pokrovskii, S.; Anischenko, I.; Rudnev, I.; Осипов, Максим Андреевич; Стариковский, Александр Сергеевич; Абин, Дмитрий Александрович; Покровский, Сергей Владимирович; Мартиросян, Ирина Валерьевна; Руднев, Игорь Анатольевич© 2019 International Institute of Refrigeration. All rights reserved. In our report, we present new results on investigation of the influence of temperature on the levitation force between the stacks of high temperature superconducting tapes (or coated conductor - CC tapes) and a permanent magnets. We studied the changing in value of levitation force at decreasing of temperature down to 30 K for field cooled (FC) and zero field cooled (ZFC) modes for various number of tape in the stack. In the measurements we used 12 mm wide commercially available CC-tape manufactured by SuperOx. The tapes were cut into pieces 12 mm x 12 mm. The number of layers in the stack ranged from 5 to 100. Cooling of the CC-tapes stack was carried out in cryo-free cryostat. Temperature range was from 30 to 80 K. Results showed that temperature has much influence on levitation force in ZFC mode whereas for FC mode the influence of temperature on levitation force is insignificant. The experimental data were compared with the results of calculations performed by using COMSOL Multiphysics. The obtained results are very useful for the practical application in magnetic levitation based systems.
- ПубликацияТолько метаданныеNonequilibrium States in HTS Tapes under the Action of Short Current Pulses(2019) Pokrovskii, S. V.; Bura, A. A.; Anishchenko, I. V.; Rudnev, I. A.; Покровский, Сергей Владимирович; Мартиросян, Ирина Валерьевна; Руднев, Игорь Анатольевич© 2019, Pleiades Publishing, Ltd.This paper presents the results of studying the nonequilibrium processes in second generation HTS tapes under the action of pulsed current loads. In the study, we used short current pulses of various amplitudes from 0.9 to 5 values of the superconductor critical current. The minimum rise time of the current was 8 µs, and the pulse duration was from 1 to 250 µs. Comparisons in the behavior of samples under long current pulses with current rise time more than 3 ms were carried out. A qualitative difference in the formation of an nonequilibrium state during short and long current pulses was found. A stable current flow with amplitudes up to 4 times larger than the critical current was obtained without degradation of the superconductor. Experimental results were analyzed on the basis of the dynamic resistance model in the flux flow regime.
- ПубликацияТолько метаданныеNumerical modeling of the switching processes in the second generation HTS tapes under the electric pulses impact(2020) Anishchenko, I. V.; Pokrovskii, S. V.; Rudnev, I. A.; Мартиросян, Ирина Валерьевна; Покровский, Сергей Владимирович; Руднев, Игорь Анатольевич© Published under licence by IOP Publishing Ltd.This paper presents the results of complex multiphysical modeling of nonequilibrium states arising in high-temperature superconducting composites under the pulsed current impact. The time dependences of the voltage on the superconducting tape under the influence of current pulses for the pulse amplitudes from 0.6 to 2 values of the critical current of the tape are obtained. Two linear modes of the sample voltage behavior during the electric current load are distinguished. A stable HTS sample switching at the current pulse amplitudes less than 1.7 Jc and the development of irreversible dynamic thermal instability for the higher currents are shown. The simulation was performed by the finite element method in the Comsol Multiphysics software package.
- ПубликацияТолько метаданныеExperimental and numerical study of radial and axial HTS magnetic couplers(2024) Osipov,M.; Martirosian,I.; Starikovskii,A.; Aleksandrov,D.; Pokrovskii,S.; Осипов, Максим Андреевич; Мартиросян, Ирина Валерьевна; Стариковский, Александр Сергеевич; Александров, Дмитрий Александрович; Покровский, Сергей Владимирович
- ПубликацияТолько метаданныеInfluence of Pressure on the Critical Current and Levitation Properties of HTS Tapes(2021) Osipov, M. A.; Pokrovskii, S. V.; Abin, D. A.; Starikovskii, A. S.; Anischenko, I. V.; Veselova, S. V.; Rudnev, I. A.; Осипов, Максим Андреевич; Покровский, Сергей Владимирович; Абин, Дмитрий Александрович; Стариковский, Александр Сергеевич; Мартиросян, Ирина Валерьевна; Веселова, Светлана Владимировна; Руднев, Игорь Анатольевич© 2021, Pleiades Publishing, Ltd.Abstract: The contemporary composite high-temperature superconducting tapes (HTS tapes) are an advanced material for development of systems based on magnetic levitation. Development of levitation systems requires awareness on information on the effect of various external factors on levitation characteristics of the tapes. One of these factors is external mechanical pressure. For comprehension of the processes of deterioration of transport and levitation characteristics originating under mechanical loads on the stacks of composite HTS tapes, the effect of pressure on the critical current and levitation properties of the HTS tapes was investigated. The compression took place in the direction perpendicular to the plane of tape. The pressure varied from 0 Pa to 695 MPa, which corresponded to the force of impact of 10 kN on the stack of fragments of HTS tapes of 12 × 12 mm2. The measurements of critical current on applied pressure both for individual tapes and for the stacks of three and five tapes were carried out. Also, the investigation of effect of compression on the levitation force of the stack of 50 tapes was carried out. The theoretical model based on the finite element method implemented with use of the Comsol Multiphysics software package was developed to analyze the obtained experimental results. On the basis of the evidence found, it can be inferred that, at uniform compression of an individual tape and stacks of tapes with small thickness (up to five tapes), deterioration of characteristics of the HTS tape takes place mainly at the boundary of the area of influence, owing to existence of bending deformation. Deterioration of the critical current and levitation force of the HTS tapes under pressures to 695 MPa was not found outside the boundaries of the impact. However, at compression of large stacks of tapes (50 units), though a boundary of compression is absent, inhomogeneous deformation of the layers of the tape proceeds, which can be produced by local flexural deformations determined by fluctuations of both shape of the tapes and thickness of the layers in individual tapes. This is responsible for a linear decrease in the levitation force with increase in pressure.
- ПубликацияТолько метаданныеControlled commutation modes in a switch based on HTS composites(2024) Martirosian, I. V.; Malyavina, A. Y.; Pokrovskii, S. V.; Rudnev, I. A.; Мартиросян, Ирина Валерьевна; Малявина, Александра Юрьевна; Покровский, Сергей Владимирович; Руднев, Игорь Анатольевич
- ПубликацияТолько метаданныеModification of a Second-Generation HTS Tape Based on GdBCO(123) under Pulsed Electron Beam Irradiation(2019) Minaev, I. M.; Troitskii, A. V.; Ponomarev, A. V.; Mikhailova, G. N.; Anishchenko, I. V.; Pokrovskii, S. V.; Rudnev, I. A.; Мартиросян, Ирина Валерьевна; Покровский, Сергей Владимирович; Руднев, Игорь Анатольевич© 2019, Allerton Press, Inc.Samples of composite second-generation high-temperature superconducting (HTS) tapes based on the GdBCO (123) compound have been irradiated in a pulsed electron accelerator (system Terek-2, GPI RAS) through a tantalum target in order to determine how the thermal and shock loads arising on the tantalum-HTS interface affect the superconducting parameters of HTS tapes. Scanning Hall magnetometry was applied to characterize HTS samples subjected to electron irradiation. The thermal modes and shock load in a composite superconductor under irradiation are estimated as functions of the energy absorbed by the target. At a silver surface temperature equal to the melting point, the critical current decreases by 87% from the initial value. At lower irradiation energies, the decrease in the critical current is smaller. The role of the temperature effects and shock waves under this irradiation is discussed.
- ПубликацияТолько метаданныеInfluence of long-term exposure of high-density direct current on the current carrying ability of 2G HTSC tapes based on the REBCO(2021) Veselova, S.; Osipov, M.; Starikovskii, A.; Anishenko, I.; Pokrovskii, S.; Abin, D.; Rudnev, I.; Веселова, Светлана Владимировна; Осипов, Максим Андреевич; Стариковский, Александр Сергеевич; Мартиросян, Ирина Валерьевна; Покровский, Сергей Владимирович; Абин, Дмитрий Александрович; Руднев, Игорь Анатольевич© Published under licence by IOP Publishing Ltd.In this work, the phenomena of electromigration in samples of HTSC tapes of the 2nd generation was investigated. Samples of REBa2Cu3O7-x (REBCO, where RE is a rare earth element) were used in the form of a copper-plated tape. A superconducting bridge was preliminarily formed on the surface of the tape by the method of chemical etching (to decrease the total value of critical current). The sample was exposed by a direct current of I = 0.9Ic . The duration of exposure was up to 350 hours. The value of the current density in the area of the bridge was J = 1.38 1010A/m2. The measurements were carried out at liquid nitrogen temperature (77 K). The influence of the electric current flow on the value of the sample critical current is controlled at the selected time intervals. The experiment showed high stability of the tape under the specified conditions.