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Your search keyword '"Aliev, Yu M."' showing total 138 results
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138 results on '"Aliev, Yu M."'

1. Ultrafast target charging due to polarization triggered by laser-accelerated electrons

Author

Brantov, A. V., Kuratov, A. S., Aliev, Yu. M., and Bychenkov, V. Yu.

Subjects
Physics - Plasma Physics, Physics - Optics
Abstract

A significant step has been made towards understanding the physics of the transient surface current triggered by ejected electrons during the interaction of a short intense laser pulse with a high-conductivity target. Unlike the commonly discussed hypothesis of neutralization current generation as a result of the fast loss of hot electrons to the vacuum, the proposed mechanism is associated with excitation of the fast current by electric polarization due to transition radiation triggered by ejected electrons. We present a corresponding theoretical model and compare it with two simulation models using the FDTD (finite-difference time-domain) and PIC (particle-in-cell) methods. Distinctive features of the proposed theory are clearly manifested in both of these models., Comment: 5 pages, 5 figures

Published
2020
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17. Viktor Pavlovich Silin (In honor of his 85th birthday)

Author

Aliev, Yu. M., Anosova, L. M., Bar’yakhtar, V. G., Vagin, K. Yu., Ignatov, A. M., Karas’, V. I., Krokhin, O. N., Malishevskii, A. S., Ovchinnikov, K. N., Peletminskii, S. V., Ramazashvili, R. R., Romanov, A. Yu., Rukhadze, A. A., Stepanov, K. N., and Uryupin, S. A.

Published
2011
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20. Viktor Pavlovich Silin (In honor of his 80th birthday)

Author

Aliev, Yu. M., Andreev, N. E., Anosova, L. M., Arsenin, V. V., Vagin, K. Yu., Grebenshchikov, S. E., Gorbunov, L. M., Malishevskiĭ, A. R., Ovchinnikov, K. N., Ramazashvili, R. R., Romanov, A. Yu., Rukhadze, A. A., Timofeev, A. V., Uryupin, S. A., and Frolov, A. A.

Published
2006
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21. Viktor Pavlovich Silin (In Honor of His 75th Birthday)

Author

Aliev, Yu. M., Andreev, N. E., Anosova, L. M., Batanov, G. M., Vagin, K. Yu., Gorbunov, L. M., Grebenshchikov, S. E., Gurevich, A. V., Ignatov, A. M., Isakov, A. I., Kovrizhnykh, L. M., Malishevskiȝ, A. S., Ramazashvili, R. R., Romanov, A. Yu., Rukhadze, A. A., Strelkov, P. S., Uryupin, S. A., and Frolov, A. A.

Published
2001
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28. Effect of the radial plasma nonuniformity on the propagation of guided m=+1 and m=-1 modes in helicon discharges.

Author

Aliev, Yu. M. and Krämer, M.

Subjects
*HELICONS (Electromagnetism), *THEORY of wave motion, *PLASMA gases, *MAXWELL equations, *ELECTROSTATICS
Abstract

Theoretical as well as numerical analyses of the full set of Maxwell's equations is carried out to study non-axisymmetric (m≠  0) guided modes in radially nonuniform helicon (HE) discharges. Unlike the axisymmetric (m = 0) modes, these modes reveal a non-reciprocal behavior with respect to the azimuthal direction. We develop the conditions for propagation and non-propagation of the various modes in the helicon parameter range, thereby focussing on the important role of the radial density gradient. Three types of modes occurring in different parameter ranges are described, i.e., the helicon (HE) mode, the electrostatic (ES) or Trivelpiece-Gould mode, and the locally coupled (LC) mode that is characterized by mode coupling (MC) in a certain region of the plasma density profile. In contrast to m=+1 modes, the parameter range of m=−1 modes is much more restricted as rather high densities are needed for the propagation of the helicon and LC modes. An important issue of the investigations is the rf power coupling and absorption via the various modes. Computations based on a simple antenna-plasma model show that the axial wavenumber of the antenna determines decisively which type of mode is excited. In case of LC mode excitation, the dominant role of the MC layer for the absorption is demonstrated. Finally, the rf power coupling to helicon modes is studied. The density limit for m=−1 helicon mode propagation and the narrow magnetic field profiles of these modes are the main reasons why the rf power absorption in helicon discharges occurs via m=+1 helicon modes. [ABSTRACT FROM AUTHOR]

Published
2016
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