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  • 1
    Electronic Resource
    Electronic Resource
    Formation of multi-charged ions and plasma stability at quasigasdynamic plasma confinement in a mirror magnetic trap : The 8th international conference on ion sources (2000)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 71 (2000), S. 669-671 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: It is known that an increase in plasma density in sources of multicharged ions leads to a substantial increase of ion current and slightly improves the ion distribution over charge states. The validity of this statement was verified in experiments with plasma densities not exceeding several units of 1012 cm−3. In the present work it is demonstrated experimentally that, for the electron densities exceeding 1013 cm−3, the regime of plasma confinement in a trap changes significantly and the quasigasdynamic regime of plasma confinement is realized. Comparison of numerical simulations and experimental data showed the essential influence of the anisotropy of electron velocity distribution in a plasma on the ion charge state distribution. This allows looking for the optimal conditions for the creation of highly charged ions in plasma. In this article we also address problems of plasma stability in an axisymmetric mirror trap under powerful microwave pumping. First experiments on ion extraction from a dense plasma pumped by millimeter wave radiation are described. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1150255
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  • 2
    Electronic Resource
    Electronic Resource
    A dielectric mixing law for porous ceramics based on fractal boundaries (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 3992-4000 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of porosity on the complex dielectric permittivity of microwave sintered zinc oxide at room temperature and 2.45 GHz is reported. The predictions of conventional Maxwell–Garnet theory and the effective medium approximation are in poor agreement with the experimental results. Various methods are employed to investigate the system in an effort to come up with new mixing laws, including combinations of these two analytic theories and finite difference electromagnetic simulations of representative microstructures. A model that assumes the existence of dielectrically inactive, fractal-geometry boundaries between ceramic grains provides an excellent description of the results with no free parameters. It gives physical insight into the experimentally observed mixing law. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.363357
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  • 3
    Electronic Resource
    Electronic Resource
    Dynamics of plasma bunches in slowly varying external fields (1999)
    Springer
    Journal of experimental and theoretical physics 89 (1999), S. 468-476 
    Details
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We use the quasineutrality approximation and the method of moments to analyze a system of kinetic equations that describes the expansion into vacuum of a plasma bunch generally containing several species of charged particles. For a two-component collisionless plasma in slowly varying external potential fields, we obtain a complete description of the dynamics of the matrices of centered second moments of the particle velocity distribution functions. We construct a new class of self-similar solutions of the kinetic equations in which the moments of the distribution functions act as parameters. These solutions are found to be valid for any mass and energy ratios of the constituent particles and generally describe the dynamics of a plasma bunch that is asymmetric in space. For a symmetric bunch we also find an analytical solution corresponding to the presence of eddy electric currents in the plasma, while for an asymmetric bunch we find that interparticle collisions, which give rise to anisotropy in the process of expansion of plasma into vacuum, play an important role. The method developed in the paper is used to study the acceleration and compression of a plasma bunch in time-dependent magnetic fields with a mirror configuration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.559005
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  • 4
    Electronic Resource
    Electronic Resource
    Exact solution of the problem of quasineutral expansion into vacuum of a localized collisionless plasma with cold ions (1998)
    Springer
    JETP letters 67 (1998), S. 573-578 
    Details
    ISSN: 1090-6487
    Keywords: 52.25.Wz ; 52.30.−q
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An analytical solution of the Vlasov equation for the electrons and the hydrodynamic equations for the ions in a self-consistent electric field is constructed in the quasineutral approximation. This solution is valid for a finite electron-to-ion mass ratio. It permits describing the expansion into vacuum of a collisionless plasma with cold ions and arbitrary initial electron velocity distribution, forming a plasmoid that is bounded and, in the general case, spherically asymmetric in space.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567728
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  • 5
    Electronic Resource
    Electronic Resource
    Ultranarrow beams of electromagnetic radiation in media with a Kerr nonlinearity (1999)
    Springer
    Journal of experimental and theoretical physics 89 (1999), S. 243-248 
    Details
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The vector structure of a self-channeling electromagnetic field is determined by solving the complete system of Maxwell’s equations in a transparent medium with a Kerr nonlinearity. Self-channelling with an asymmetric angular distribution of the field occurs at powers several times the critical self-focusing power. As the power is increased, a universal (self-similar) field structure develops in which only the scales change as the power is varied. Self-channelling with a channel width much smaller than the (linear) wavelength of the light, i.e., a “needle of light” with an extreme concentration of radiant power, is found to occur.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.558976
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  • 6
    Electronic Resource
    Electronic Resource
    Stability of pores in solid membrane films (2000)
    Springer
    Journal of materials science 19 (2000), S. 1851-1854 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006719128935
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  • 7
    Electronic Resource
    Electronic Resource
    Structure of dysprosium monotartrate in aqueous solution from magnetic double refraction and molecular mechanics data (1992)
    Springer
    Russian chemical bulletin 41 (1992), S. 1745-1749 
    Details
    ISSN: 1573-9171
    Keywords: dysprosium monotartrate ; magnetic double refraction ; molecular mechanics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract pH-Metering and magnetic double refraction are used to determine the molar constant of magnetic double refraction of dysprosium monotartrate DyH2L+ (H4L is tartaric acid). A molecular mechanics technique (Dashevskii-Plyamovatyi model) was used to model the structure of the ligand and hydrate surroundings of dysprosium(III) in DyH2L+. Theoretical molar constants of magnetic double refraction calculated from the molecular mechanics data (CONKERR program) were compared with the experimental values; the most probable models of the surroundings of the dysprosium(III) are established.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00863802
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  • 8
    Electronic Resource
    Electronic Resource
    Ionization wave in a longitudinal RF field (1995)
    Springer
    Radiophysics and quantum electronics 38 (1995), S. 645-651 
    Details
    ISSN: 1573-9120
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract We investigate a stationary one-dimensional ionization wave produced in a cold gas by an alternating electric field of frequency ω (the field is parallel to the direction of propagation of the wave). Primary attention is given to specific features associated with the existence of a plasma resonance transition region at the front of the wave, where the electric-field amplitude and, therefore, the collisional ionization rate of the gas have a pronounced maximum at low electron-collision frequencies ν≪ω. We investigate analytically and calculate numerically the parameters of the wave, which is described by a nonlinear diffusion equation. It is shown that a made of “ultrafast” discharge propagation with ionization wave velocity V→∞ for ν/ω→0 can be established in the gas due to resonance effects even if the external electric field has amplitude far below breakdown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01040363
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  • 9
    Electronic Resource
    Electronic Resource
    Amplitude-phase adaptation over extended inhomogeneous paths by means of flexible mirrors (1985)
    Springer
    Russian physics journal 28 (1985), S. 887-894 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Conclusions We formulate the main conditions requiring amplitude-phase tracking to adapt to thermal defocusing: long line length, marked nonlinearity that accelerates mixing of the phase and amplitude inhomogeneities, deep amplitude modulation in the initial beam, and the presence of dislocations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00891732
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  • 10
    Electronic Resource
    Electronic Resource
    Steady microwave discharge in quasioptical resonator (1982)
    Springer
    Radiophysics and quantum electronics 25 (1982), S. 270-274 
    Details
    ISSN: 1573-9120
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01034292
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