Персона: Пирог, Владимир Андреевич
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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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Владимир Андреевич
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- ПубликацияОткрытый доступMultichannel laser radiation collection and transport system for particle velocity measurements in shock wave experiments(2019) Tishenko, I. Y.; Gubskiy, K. L.; Pirog, V. A.; Kazieva, T. V.; Lukyanov, K. S.; Morozov, A. A.; Kuznetsov, A. P.; Тищенко, Илья Юрьевич; Губский, Константин Леонидович; Пирог, Владимир Андреевич; Казиева, Татьяна Вадимовна; Лукьянов, Константин Сергеевич; Кузнецов, Андрей Петрович© Published under licence by IOP Publishing Ltd.VISAR type measuring laser systems are used for the determination of surface velocities in high-speed processes. Their operational characteristics mostly depends on the efficiency of collection of scattered radiation. In this paper we present results of the comparative analysis of several radiation collection schemes along with experimentally obtained data on the scheme parameters effect on collection efficiency and recording length.
- ПубликацияОткрытый доступPeriodic error while processing data from a velocity interferometer system for any reflector(2021) Kazieva, T. V.; Gubskiy, K. L.; Kuznetsov, A. P.; Pirog, V. A.; Tishchenko, I. Y.; Казиева, Татьяна Вадимовна; Губский, Константин Леонидович; Кузнецов, Андрей Петрович; Пирог, Владимир Андреевич; Тищенко, Илья Юрьевич© Published under licence by IOP Publishing Ltd.When processing experimental data with systems such as velocity interferometer system for any reflector (VISAR), periodic measurement uncertainty arises. The appearance of its uncertainty is investigated and computer modeling of signal processing with random noise is carried out. Analytical dependences of the error value on the signal-To-noise ratio and signal phase are obtained. Methods of reducing this error are considered.
- ПубликацияОткрытый доступVernier laser diagnostic system for velocity measurements at Angara-5-1 facility(2020) Laukhin, Ya. N.; Frolov, I. N.; Branitskii, A. V.; Pirog, V. A.; Tishchenko, I. Yu.; Gubskiy, K. L.; Kuznetsov, A. P.; Пирог, Владимир Андреевич; Тищенко, Илья Юрьевич; Губский, Константин Леонидович; Кузнецов, Андрей Петрович© Published under licence by IOP Publishing Ltd.The report presents a laser diagnostic system designed to analyze the behavior of a matter in extreme states and the propagation of shock waves. The research system consists of a pair of velocity interferometer systems for any reflector (VISAR), push pull and conventional VISARs, forming a vernier scheme. This configuration was designed for Angara-5-1 facility. Test experiments of metal plate acceleration using magnetic field were carried out. The velocities up to 6 km/s were obtained.
- ПубликацияОткрытый доступHybrid interferometer system for velocity measurements(2020) Pirog, V. A.; Gubskiy, K. L.; Tishenko, I. Yu.; Kazieva, T. V.; Пирог, Владимир Андреевич; Губский, Константин Леонидович; Тищенко, Илья Юрьевич; Казиева, Татьяна Вадимовна© Published under licence by IOP Publishing Ltd.The first result of the developed hybrid system for measuring the mass velocity of a matter is presented in the article. It combines two methods, VISAR and PDV, to compensate for their shortcomings. The scheme of the measuring system and the results of the laboratory experiment are shown.
- ПубликацияОткрытый доступCombination of the velocity interferometer system for any reflector and the photon Doppler velocimetry methods to study transparent and absorbing condensed matter(2020) Ananev, S. Yu.; Grishin, L. I.; Kazieva, T. V.; Gubskiy, K. L.; Kuznetsov, A. P.; Tishchenko, I. Yu.; Glukhov, R. D.; Pirog, V. A.; Казиева, Татьяна Вадимовна; Губский, Константин Леонидович; Кузнецов, Андрей Петрович; Тищенко, Илья Юрьевич; Пирог, Владимир Андреевич© Published under licence by IOP Publishing Ltd.The paper proposes a method for combining photon Doppler velocimetry and a system of speed interferometers for any reflective systems, which allows one to study the behavior of transparent media under the action of powerful shock waves without the use of additional reflective surfaces. The paper presents the results of an experiment on the propagation of a shock wave in water. In this experiment, water was an absorber; however, the proposed method would also work provided that the test material is transparent and provides reflection.
- ПубликацияТолько метаданныеA Three-Phase PDV Signal-Processing Method that Eliminates the Influence of Acceleration on Determining Velocity(2022) Kazieva, T. V.; Tishchenko, I. Y.; Reshetov, V. N.; Gubskiy, K. L.; Pirog, V. A.; Казиева, Татьяна Вадимовна; Тищенко, Илья Юрьевич; Решетов, Владимир Николаевич; Губский, Константин Леонидович; Пирог, Владимир Андреевич© 2022, Pleiades Publishing, Ltd.Abstract: The interference method for determining the velocity of objects using direct optical heterodyning (photonic Doppler velocimetry) has become widespread due to the ease of setting up the fiber-optic system, the unambiguous results that it produces, and the wide possibilities for varying the measurement accuracy and temporal resolution. The accuracy of velocity measurements can be fractions of a percent, but there are a number of factors that interfere with this. For example, a change in the velocity of an object, that is, its movement with acceleration, leads to a broadening of the signal spectrum with an increase in the working time window and, as a result, to a decrease, rather than an increase, in the accuracy of measuring the velocity. In this letter, a method is proposed that allows one to compensate for the effect of acceleration on the accuracy of velocity measurement. The proposed model for processing the registered signals makes it possible to determine both the acceleration and the velocity of the object. The applied algorithm made it possible to avoid the expansion of the spectrum with an increase in the time window and to improve the accuracy of measuring the velocity of a freely falling body by an order of magnitude.
- ПубликацияТолько метаданныеShock Hugoniot of porous nanosized nickel(2022) Ananev, S. Yu.; Yakushev, V. V.; Rostilov, T. A.; Ziborov, V. S.; Dolgoborodov, A. Yu.; Pirog, V. A.; Grishin, L. I.; Пирог, Владимир Андреевич© 2022 Author(s).The shock compression of porous nickel from nanosized particles nNi was studied at a pressure range of 4-61 GPa. The average size of the nNi particles was 50 nm, and the porosity of the samples was 50%. Plane shock waves in the samples were generated by the impact of aluminum plates accelerated to velocities ranging from 0.8 to 5 km/s. Laser interferometry was used to monitor particle velocity histories at the interface between the samples and water or LiF windows. The data obtained at pressures below 8 GPa showed a complex shock wave profile with the formation of an elastic precursor wave. The shock Hugoniot and data on the expansion isentropes were obtained. The Hugoniot of nanosized nNi coincided within the experimental errors with the Hugoniot of micron-sized nickel. The Hugoniot calculated on the basis of the equation of state for porous nickel was in good agreement with that of experimental data. It has been established that in the middle pressure range (20-35 GPa), the expansion isentropes in the "pressure-particle velocity"coordinates become noticeably flatter with a significant increase in the particle velocity. The reason for this phenomenon is still unclear. An assumption was made about the onset of particle melting upon reaching pressures above 15 GPa.