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.

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.

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.

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.

2019, Gorbashova, M. A., Gubskiy, K. L., Glukhov, R. G., Dyagileva, D. V., Kuznetsov, A. P., Губский, Константин Леонидович, Кузнецов, Андрей Петрович

© Published under licence by IOP Publishing Ltd.The article describes a multichannel modular system for velocity measuremens in shock physics. The two-channel time compression system is based on PDV method. It was tested in lead dusting experiments.

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.

2020, Ehret, M., Santos, J. J., Zielbauer, B., Abe, Y., Bukharskii, N. D., Kochetkov, Y. V., Gubskiy, K. L., Kuznetsov, A. P., Korneev, P. A., Бухарский, Николай Дмитриевич, Кочетков, Юрий Владимирович, Губский, Константин Леонидович, Кузнецов, Андрей Петрович, Корнеев, Филипп Александрович

© Published under licence by IOP Publishing Ltd.Proton radiography is a common diagnostic technique in laser-driven magnetic field generation studies. It is based on measuring proton beam deflection in electromagnetic fields induced around the target with the help of radiochromic film stacks. Unraveling information recorded in experimental radiographs and extracting the field profiles is not always a straightforward task. In this paper, some aspects of data analysis by reproducing experimental radiographs in numerical simulations are described. The approach allows determining the field strength and structure in the target area for various target geometries.

2019, Reshetova, M., Reshetov, V., Gubskiy, K., Sorokin, S., Губский, Константин Леонидович

© Published under licence by IOP Publishing Ltd.The seismic situation in a number of rooms of the NRNU MEPhI, including the Laboratory Building, where the construction of the multifunctional laser complex ELF is planned, is studied. Estimations of seismic and vibrational noise at the main and isolated parts of the basement of the room that hosts the laser complex are obtained.

2015, Савченков, А. В., Губский, К. Л., Кузнецов, А. П., Никитина, Е. И., Тугаринов, С. Н., Бужинский, О. И., Кузнецов, Андрей Петрович, Губский, Константин Леонидович

The development of cleaning optics and deposition-mitigating techniques is a key factor in the construction and operation of optical diagnostics in ITER. It has been shown that high initial reflection characteristics of optical elements can be recovered by choosing regimes of fiber laser radiation effect on the deposited surface. Experiments on transport of fiber laser radiation to the metal mirror by using system of lens and cleaning showed the possibility of a hardware implementation of methods applicable in the geometry of port-plug ITER.

2020, Kazieva, T. V., Gubskiy, K. L., Reshetov, V. N., Kuznetsov, A. P., Казиева, Татьяна Вадимовна, Губский, Константин Леонидович, Решетов, Владимир Николаевич, Кузнецов, Андрей Петрович

© Published under licence by IOP Publishing Ltd.The paper describes a method for measuring the surface area function of the tips of the probes of nanohardness testers using a laser interferometer. The features of the developed system provide traceability of measurements to the standard of length through the wavelength of a stabilized source of laser radiation. In addition, it is possible to measure the parameters of the probe tip without removing it from the nanohardness tester, which allows the device not to be taken out of working condition and provides unambiguous measurements.