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93 results on '"Malyuta, D. D."'

4. Laser Propulsion Applications For Space Research

Author

Rodin, A. V., primary, Malyuta, D. D., additional, Nastoyashchiy, A. F., additional, Naumov, V. G., additional, Shashkov, V. M., additional, Phipps, Claude, additional, Komurasaki, Kimiya, additional, and Sinko, John, additional

Published
2010
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5. Deposition of intermediate (barrier) coatings of silicon and germanium on steel, titanium or aluminum substrates using laser ablation.

Author

Rodin, A. V., Ivanov, D. A., Malyuta, D. D., Pavlov, S. P., Sarkarov, N. E., and Shedrov, A. S.

Subjects
INTERMEDIATES (Chemistry), SURFACE coatings, GERMANIUM, SUBSTRATES (Materials science), LASER ablation, SILICON films, THICKNESS measurement, CRYSTAL structure
Abstract

The paper presents the results of the first stage of the experimental research of intermediate (barrier) silicon and germanium coating deposition on the substrates not proned to the formation of carbides (steel, titanium, aluminum) by laser ablation. These experiments were carried out using modified YAG-Nd3+ solid state laser of LTI-130 type with the wave length of 1064.1 nm. It was shown that the sequence of large numbers of nanosecond pulses which composed the train of laser radiation provided the material ablation under the power of two orders of the magnitude less than that of the single pulse necessary for the ablation process. In the experiments, silicon coatings up to 5 μm in thickness and germanium coatings of 1-3 μm in thickness were produced on substrates from steel, aluminum and titanium. It was determined that the roughness of substrate surface for deposition of intermediate (barrier) coatings had a strong influence on the coating structure. Silicon films on substrate surfaces with the roughness ≤10 μm were denser and more homogeneous and looked like amorphous films without a crystal structure. On surfaces with the roughness >20 μm a silicon film had a crystal structure with the size of crystallites about 5 μm. It was shown that unlike the silicon the germanium in the same experimental conditions had the tendency to the formation of films with elements of a crystal structure. Germanium coatings were not homogeneous and consisted of the mixture accumulations of crystallites and amorphous fields. [ABSTRACT FROM AUTHOR]

Published
2012
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14. Average power limitations in high-repetition-rate pulsed gas lasers at 10.6 and 16 μm

Author

Baranov, V. Yu., Kazsakov, S. A., Malyuta, D. D., Mezhevov, V. S., Napartovich, A. P., Nisiev, V. G., Orlov, M. Yu., Starodubtsev, A. I., and Starostin, A. N.

Abstract

Processes resulting in average power limitations in high-repetition-rate pulsed lasers are studied. The description and performance of a CO_2 laser with an average power up to 10 kW as well as of an optically pumped CF_4 laser are given.

Published
1980

15. TIR-1 carbon dioxide laser system for fusion

Author

Adamovich, V. A., Anisimov, V. N., Afonin, E. A., Baranov, V. Yu., Borzenko, V. L., Kozochkin, S. M., Malyuta, D. D., Satov, Yu. A., Sebrant, A. Yu., Smakovski, Yu. B., Starostin, A. N., Streltzov, A. P., Petryakov, V. M., and Chalkin, S. F.

Abstract

During recent years pulsed CO_2 lasers for fusion research have been under construction in the I. V. Kurchatov Institute of Atomic Energy and the D. V. Efremov Electro-Physical Apparatus Institute. Efforts are being concentrated at present on two approaches: (1) microsecond laser pulse plasma heating in solenoids and θ pinches (UTRO system) and (2) nanosecond CO_2 laser utilization for inertial confinement fusion. The TIR-1 system was created to develop nanosecond CO_2 laser technology and to study laser–target interaction at 10 μm. This system is designed to deliver ~1-kJ energy in one beam of ~1-nsec duration. The TIR-1 system consists of an oscillator–preamplifier system that produces an ~1-nsec laser pulse with an energy contrast ratio of ~10^6, a large-aperture (30 × 30-cm^2) triple-pass amplifier capable of providing ≈1 kJ in a 1-nsec pulse, a target chamber with diagnostic equipment, and associated engineering systems.

Published
1980

16. Materials processing by high-repetition-rate pulsed excimer and carbon dioxide lasers

Author

Anisimov, V. N., Arutyunyan, R. V., Baranov, V. Yu., Bolshov, L. A., Velikhov, E. P., Dolgov, V. A., Ilyin, A. I., Kovalevich, A. M., Kraposhin, V. S., Malyuta, D. D., Matveeva, L. A., Mezhevov, V. S., Pismennyi, V. D., Sebrant, A. Yu., Stepanov, Yu. Yu., and Stepanova, M. A.

Abstract

Recently created pulsed gas lasers with high pulse repetition rate produce radiation in the IR [ V. Yu. Baranov , in Molecular Gas Lasers. Physics Applications, VelikhovE. P., Ed. ( Mir, Moscow, 1981), pp. 252– 255] and the UV ( V. Yu. Baranov , in Proceedings, International Conference on Lasers, 14–18 Dec. 1981, pp. 968– 974) regions of the spectrum. These lasers are widely used in research on the selective excitation of matter. This field of study includes laser isotope separation { G. I. Abdushelashvili , Kvantovaya Elektron. (Moscow)9, 743 ( 1982) [ Sov. J. Quantum Electron.12, 459 ( 1982)]} and laser-induced chemical reactions [ V. Yu. Baranov , Preprint IAE 3693/13 ( Moscow, 1982)]. But there are few publications dealing with uses of high-repetition-rate lasers for materials processing, although this problem undoubtedly is of considerable scientific interest.

Published
1984

19. Influence of Boundary Layers of Electrical Characteristics of MHD Generators

Author

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH, Volkov, Yu. M., Malyuta, D. D., Panchenko, V. P., FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH, Volkov, Yu. M., Malyuta, D. D., and Panchenko, V. P.

Abstract

An analysis is made of the boundary layer effect on the electrical characteristics of a Faraday MHD generator. An electrical substitution circuit and a method for calculating its elements are proposed. An analysis is made of the local circuit for the substitution of a channel in a gas-dynamic approximation. It is noted that the questions of the flow of current through a turbulent boundary layer require careful examination. It has been shown that the existing methods for the calculation of real resistance of a boundary layer, which are based on a break in integration on a certain arbitrary boundary from the electrode, give results which are strongly dependent on the selection of this boundary., Edited machine trans. of mono. Vliyanie Pogranichnykh Sloev na Elektrichkie Kharakteriskiki MGD Generators, Moscow 28p 1970, by Charles T. Ostertag.

Published
1972

20. Passage of Current through Boundary Layers

Author

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO, Baranov,V. Yu., Malyuta,D. D., Ulinich,F. R., FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO, Baranov,V. Yu., Malyuta,D. D., and Ulinich,F. R.

Abstract

The drop in potential near an electrode in the presence of a cold boundary layer is studied theoretically and experimentally. The effect of a microarc on the gas-dynamic parameters in the channel of a MHD generator is analyzed., Edited trans. of Teplofizika Vysokikh Temperatur (USSR) v11 n3 p457-467 May/Jun 73, by Louise E. Heenan.

Published
1974

36. Experiments on plasma heating by CO2laser radiation in the TIR-1 facility

Author

Akimov, A E, primary, Baranov, V Yu, additional, Boĭko, V A, additional, Borzenko, V L, additional, Bryunetkin, B A, additional, Kozochkin, S M, additional, Makarov, K N, additional, Malyuta, D D, additional, Pis'mennyĭ, V D, additional, Satov, Yu A, additional, Skobelev, I Yu, additional, Sobolev, S S, additional, Strel'tsov, A P, additional, and Faenov, A Ya, additional

Published
1983
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38. Transient optical nutations in a CO2amplifier

Author

Baranov, V Yu, primary, Borzenko, V L, additional, Kozochkin, S M, additional, Makarov, K N, additional, Malyuta, D D, additional, Petrushevich, Yu V, additional, Satov, Yu A, additional, Starostin, Andrei N, additional, and Strel'tsov, A P, additional

Published
1984
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