Search Results - (Author, Cooperation:D. Morozov)

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  1. 1
    Staff View
    Publication Date:
    2016-05-07
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Helander, P. ; Krasheninnikov, S. I. ; Morozov, D. Kh. ; Soboleva, T. K.

    [S.l.] : American Institute of Physics (AIP)
    Published 1995
    Staff View
    ISSN:
    1089-7674
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    In order to reduce the heat flux entering the divertor, it is desirable to have strong impurity radiation in the scrape-off layer (SOL) of reactor-size tokamaks like the International Thermonuclear Experimental Reactor [International Thermonuclear Experimental Reactor (ITER) Conceptual Design Activity Final Report, ITER Documentation Series No. 16 (International Atomic Energy Agency, Vienna, 1991)]. Under such circumstances, however, the SOL plasma is likely to be unstable to the radiative condensation instability. In the present paper, an investigation is undertaken to study the effects of edge-localized mode (ELM) activity on this instability. In the linear regime, it is demonstrated that high-frequency ("grassy'') ELM's may parametrically excite acoustic waves. The possibility of nonlinear radiative collapse with concomitant stratification of the plasma is discussed, and solutions describing nonlinear traveling waves are derived in which the plasma goes over from equilibrium state to another. © 1995 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.871076

    Articles: DFG German National Licenses
  3. 3
    Morozov, D. Kh.

    [S.l.] : American Institute of Physics (AIP)
    Published 2000
    Staff View
    ISSN:
    1089-7674
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    As shown in recent years, a strong electrostatic field exists in the tokamak Scrape-Off-Layer (SOL) and divertor zone. In the present paper it is demonstrated that the E×B drifts resulting from it, compete with the impurity velocities caused by friction with the main ions, as well as with thermal forces. This effect can redistribute impurity flows significantly. Particularly, it may lead to impurity flow reversal. Fluid equations for the test impurities are derived using the two most representative ionization states model. As shown to first approximation, impurity motion does not depend on the ionization state. For a favorable magnetic-field direction, when the ion ∇B drift is directed towards the X-point, in the private region the impurities flow from the outer to the inner divertor plate. On the contrary, in the SOL the impurity flow is directed from the inner to the outer plate. Significant impurity velocity shear exists near the separatrix, and creates the effect of flow reversal. Diffusion across the flux surfaces transports impurities flowing away from the divertor plates to regions with the opposite flow direction. A reduced visual model is presented. © 2000 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.873928

    Articles: DFG German National Licenses
  4. 4
    Morozov, D. Kh. ; Herrera, J. J. E. ; Rantsev-Kartinov, V. A.

    [S.l.] : American Institute of Physics (AIP)
    Published 1995
    Staff View
    ISSN:
    1089-7674
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    It is shown that a stochastic layer produced by ripple perturbations near the separatrix in tokamaks, leads to anomalous plasma flow out of the bulk plasma along perturbed field lines, which brings out impurities. This suggests that the stochastic layer may play a cleaning role. There is an opposite process of anomalous impurity diffusion into the plasma. The balance of these two processes defines the impurity concentration in the bulk plasma. © 1995 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.871305

    Articles: DFG German National Licenses
  5. 5
    Morozov, D. Kh. ; Rantsev-Kartinov, V. A.

    [S.l.] : American Institute of Physics (AIP)
    Published 1995
    Staff View
    ISSN:
    1089-7623
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Electrical Engineering, Measurement and Control Technology
    Notes:
    A new method is proposed for determination of the magnetic island location from the density profiles of multiply charged impurity ions. The method is based on (1) measuring the impurity ion's emissivity profiles in T-10 tokamak experiments and (2) a theoretical model for the behavior of the impurities under conditions of sawtooth oscillations. The main physical basis of the method is the fact that the impurity is forced out from the sawtooth region in such a way that the profile of impurity ions appears to be a composition of two different profiles. These two profiles are determined by the Braginskii mechanism of impurity diffusion sustained in the regions r(approximately-greater-than)rs and r〈(rs−Δ), whereas in the transient region (rs−Δ)≤r≤rs the impurity density has a sharp drop with decreasing minor radius. Interpretation of T-10 tokamak experimental data within the frame of a theoretical model allows one to determine the location of the surface q=1 and the width of magnetic islands. The method appears to be very sensitive to the level of large-scale MHD activity of the plasma. © 1995 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.1146332

    Articles: DFG German National Licenses
  6. 6
    Gervids, V. I. ; Morozov, D. Kh.
    Springer
    Published 1998
    Staff View
    ISSN:
    1090-6487
    Keywords:
    52.25.Kn ; 52.25.Vy ; 52.35.Ra
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract It is shown that an anomalously large displacement of equilibrium occurs in systems with rapidly oscillating temperature. The thermodynamic parameters of such a system differ substantially from the values corresponding to constant temperature. The dynamics of the distributions of hydrogen ions and impurity helium and carbon ions over ionization states in a hydrogen plasma and the dynamics of the intensity distribution of the line radiation of impurity carbon in a hydrogen plasma with oscillating temperature are calculated as an example. In systems with fluctuating temperature, the effect in question could be important in virtually all problems based on levelwise kinetics, for example, the energy balance and spectral diagnostics of turbulent plasma, the criterion of thermal stability, the dynamics of turbulent plasma and gas jets, the conditions for amplifier and oscillator operation in the active media of electric-discharge gas lasers, and so on.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1134/1.567667

    Articles: DFG German National Licenses
  7. 7
    Gervids, V. I. ; Morozov, D. Kh.
    Springer
    Published 2000
    Staff View
    ISSN:
    1562-6938
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract Based on the analytical study of the solutions to the coronal balance equations, as well as on the numerical results, it is shown that, in many cases of practical interest, it is possible to describe the impurity ionization state with acceptable accuracy by only the two or three most representative ionization states. Reduced models for light impurities and strongly ionized heavy impurities in coronal hydrogen plasmas are proposed. The models make it possible to obtain analytical results for many cases as well as to significantly reduce computation time. In these approximations, simple equations determining the dynamics of impurity distributions over ionization states are derived.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1134/1.952876

    Articles: DFG German National Licenses
  8. 8
    Morozov, D. F. ; Cherdantsev, P. A.
    Springer
    Published 1973
    Staff View
    ISSN:
    1573-9228
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract The potential of a two-centered oscillator is compared to a finite potential. For small deformations agreement is observed in the behavior of the potentials. The procedure of selfconsistency is carried out within the limits of the given model.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00893347

    Articles: DFG German National Licenses
  9. 9
    Morozov, D. F.
    Springer
    Published 1974
    Staff View
    ISSN:
    1573-9228
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract The method proposed in [1] is used to find the polarization contribution to the differential (in the invariant masses of the created pairs and angles) production cross section of two fermion pairs in the annihilation of a pair of polarized fermions. Integration with respect to the angles is performed for the cases of longitudinal and transverse polarization of the initial particles. The contractions of tensors are found without calculation of the tensors themselves by means of the device proposed in [3].
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00890219

    Articles: DFG German National Licenses
  10. 10
    Staff View
    ISSN:
    1573-9228
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00891491

    Articles: DFG German National Licenses
  11. 11
    Morozov, D. F. ; Cherdantsev, P. A.
    Springer
    Published 1973
    Staff View
    ISSN:
    1573-9228
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract Calculation of equilibrium deformations of light nuclei and rare-earth nuclei is carried out by a method suggested in [1]. For light nuclei an anisotropic oscillator potential is used, while for the rare-earth domain we employ Nilsson's potential [2]. An isospin dependence of the oscillator frequencies is employed. The results agree qualitatively with calculations made according to Strutinsky's method [3].
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00895687

    Articles: DFG German National Licenses
  12. 12
    Staff View
    ISSN:
    1573-8345
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Energy, Environment Protection, Nuclear Power Engineering
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF01471154

    Articles: DFG German National Licenses