Search Results - "Savel'ev, A. A."

Numerical Simulation of Unsteady Subsonic Viscous Gas Flows Based on High-Order Composite Compact Schemes by Savel’ev, A. D.

“…A family of high-order multioperator compact schemes for computation of viscous gas flows on curvilinear grids is considered. Depending on the number of…”
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Robust multifilament arrays in air by Dammann grating by Pushkarev, D. V., Lar’kin, A. S., Mitina, E. V., Zhidovtsev, N. A., Uryupina, D. S., Volkov, R. V., Karpeev, S. V., Khonina, S. N., Karabutov, A. A., Geints, Yu. E., Kosareva, O. G., Savel’ev, A. B.

“…We compare transverse structure evolution and energy deposition into the medium within focused multifilament arrays created using two different types of…”
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Enhanced forward THz yield from the long DC-biased femtosecond filament by Mitina, E., Uryupina, D., Nikolaeva, I., Shipilo, D., Panov, N., Ushakov, A., Volkov, R., Kosareva, O., Savel’ev, A.

“…We observed huge, almost two orders of magnitude, increase in the energy of the forward terahertz (THz) emission by the long femtosecond filament if transverse…”
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Ring and unimodal angular-frequency distribution of THz emission from two-color femtosecond plasma spark by Ushakov, A A, Chizhov, P A, Andreeva, V A, Panov, N A, Shipilo, D E, Matoba, M, Nemoto, N, Kanda, N, Konishi, K, Bukin, V V, Kuwata-Gonokami, M, Kosareva, O G, Garnov, S V, Savel'ev, A B

“…We study angular and frequency-angular distributions of the terahertz (THz) emission of the low-frequency region (0.3-3 THz) from a two-color femtosecond…”
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Fifteen meter long uninterrupted filaments from sub-terawatt ultraviolet pulse in air by Shipilo, D E, Panov, N A, Sunchugasheva, E S, Mokrousova, D V, Shutov, A V, Zvorykin, V D, Ustinovskii, N N, Seleznev, L V, Savel'ev, A B, Kosareva, O G, Chin, S L, Ionin, A A

“…A technique is presented to create uninterrupted long ultraviolet filaments in air using appropriately structured transmission mesh. The mesh with different…”
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Change in Separation Flow Regimes over Obstacles in Subsonic Gas Flow as a Manifestation of Viscous Forces: Numerical Results by Savel’ev, A. D.

“…The unsteady subsonic viscous gas flows over forward- and backward-facing steps on a flat surface are numerically simulated at a free-stream Mach number of 0.1…”
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Waveform, spectrum, and energy of backward terahertz emission from two-color femtosecond laser induced microplasma by Ushakov, A. A., Panov, N. A., Chizhov, P. A., Shipilo, D. E., Bukin, V. V., Savel'ev, A. B., Garnov, S. V., Kosareva, O. G.

“…We measured the key characteristics of the backward terahertz (THz) emission from a two-color femtosecond laser spark in air: waveform, spectrum, and energy…”
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Composition and Technology for Applying a Refractory Coating for Wood Using a Nanosize Filler by Savel’ev, A. P., Chugunov, M. N., Enaleeva, S. A., Kravchenko, I. N.

“…Results of studying effective use of nanostructured filler and single- and (or) two-layer application of flame retardant on wood are presented. It is…”
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Optimum chirp for efficient terahertz generation from two-color femtosecond pulses in air by Zhang, Zhen, Panov, N., Andreeva, V., Zhang, Zhelin, Slepkov, A., Shipilo, D., Thomson, M. D., Wang, Tie-Jun, Babushkin, I., Demircan, A., Morgner, U., Chen, Yanping, Kosareva, O., Savel'ev, A.

“…We compare detailed spatio-temporal propagation simulations with experiments on generation of terahertz (THz) pulses in single filaments with two-color optical…”
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Symmetry Breaking and Strong Persistent Plasma Currents via Resonant Destabilization of Atoms by Brée, C, Hofmann, M, Demircan, A, Morgner, U, Kosareva, O, Savel'ev, A, Husakou, A, Ivanov, M, Babushkin, I

“…The ionization rate of an atom in a strong optical field can be resonantly enhanced by the presence of long-living atomic levels (so-called Freeman…”
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The Rise of Forces on a Wedge during the Interaction of a Sliding Discharge with a Supersonic Flow by Bocharnikov, V. M., Golub, V. V., Savel’ev, A. S.

“…The force arising on a wedge during the interaction of a sliding discharge with a supersonic flow is investigated. The sliding discharge was created in a…”
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Remote triggering of air-gap discharge by a femtosecond laser filament and postfilament at distances up to 80 m by Kosareva, O. G., Mokrousova, D. V., Panov, N. A., Nikolaeva, I. A., Shipilo, D. E., Mitina, E. V., Koribut, A. V., Rizaev, G. E., Couairon, A., Houard, A., Savel'ev, A. B., Seleznev, L. V., Ionin, A. A., Chin, S. L.

“…We experimentally observed laser-induced remote high-voltage discharge triggering between two needle electrodes with half-a-cm spacing. The discharge was…”
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Optical Spectroscopic Study of Diffusion Combustion of a Suspension of Boron Nanoparticles in Isopropanol in Oxygen Coflow by Aiyyzhy, K. O., Barmina, E. V., Kobtsev, V. D., Kozlov, D. N., Kostritsa, S. A., Orlov, S. N., Savel’ev, A. M., Smirnov, V. V., Titova, N. S., Shafeev, G. A.

“…The stationary diffusion combustion of a boron nanoparticle suspension in isopropanol in oxygen coflow and the pulsed laser photolytic initiation of this…”
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Laser-driven pointed acceleration of electrons with preformed plasma lens by Ivanov, K. A., Gorlova, D. A., Tsymbalov, I. N., Tsygvintsev, I. P., Shulyapov, S. A., Volkov, R. V., Savel’ev, A. B.

“…The simultaneous laser-driven acceleration and angular manipulation of the fast electron beam are experimentally demonstrated. The bunch of multi-MeV energy…”
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Photoexcitation of spin isomers of In and Cd nuclei in the pigmy resonance region by Nedorezov, V, Konobeevski, E, Polonski, A, Ponomarev, V, Savel'ev, A, Solodukhov, G, Tsymbalov, I, Turinge, A, Zuyev, S, Gorlova, D

“…New experimental results on photo-excitation of the Cd and In spin isomers by real and virtual photons (electrons) in the threshold energy region are…”
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Regioselective Synthesis of 1,3,5-Trisubstituted Pyrazoles Containing an Anthranilic Acid Motif by Savel’ev, Viktor A., Kotova, Anna A., Rybalova, Tatyana V., Shults, Elvira E.

“…An effective method was developed for the synthesis of 1,3,5-trisubstituted pyrazoles by using acetylenic ketones, obtained from ethyl 5-ethynylanthranilate,…”
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On the Kinetic Mechanism of Ignition of Diborane Mixtures with Air by Savel’ev, A. M., Kuleshov, P. S., Lukhovitskii, B. I., Pelevkin, A. V., Savel’eva, V. A., Sharipov, A. S.

“…A reaction model is proposed for calculating the process of ignition of diborane mixtures with air. The model summarizes the previously developed kinetic…”
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Dependence of Properties of High Voltage Zinc Oxide Varistor from Antimony and Nickel Oxides by Gromov, O. G., Tikhomirova, E. L., Savel’ev, Yu. A.

“…Studies were carried out to reduce the leakage current of high-voltage ZnO varistor ceramics by varying Sb 2 O 3 and NiO content in a ZnO-Bi 2 O 3 -Sb 2 O 3…”
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Effect of Impurities on Varistor Properties of High-Voltage ZnO Ceramics by Tikhomirova, E. L., Gromov, O. G., Savel’ev, Yu. A.

“…The effect of cationic and anionic impurities on the varistor properties of high-voltage ZnO ceramics with a ZnO content of 75 wt % and a weight ratio of…”
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Multioperator representation of composite compact schemes by Savel’ev, A. D.

“…The multioperator approach is used to obtain high-order accurate compact differences. These differences are developed to describe convective terms of…”
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