| //Росатом/ ВНИИЭФ |
Контакты
En STATE CORPORATION ROSATOM
|
|
2011Dubinov A. E. Transverse motion of charged particle with oscillating charge in magnetic field // Technical physics letters 2011, T. 37, № 4, С. 344 – 346Russian Federal Nuclear Center (VNIIEF), Sarov, Russia It is established that a particle bearing an oscillating electric charge can exhibit transverse drift in a homogeneous magnetic field. This drift has a resonance character and cannot be eliminated even at small amplitudes of charge oscillations. Dubinov A. E. Ponderomotive transport of charged grains in dusty plasma // Technical physics letters 2011, T. 37, № 2, С. 123 – 125 Russian Federal Nuclear Center (VNIIEF), Sarov, Russia The ponder motive force with which a rapidly oscillating electric field of dusty plasma acts on a charged grain in this plasma is considered. Allowance for the field - induced charge oscillations in the grain reveals new components of the ponder motive force, which have not been previously described in the literature. One of these components is no vanishing even in the case of homogeneous plasma and field, which results in a directed transport of the charged fraction of dusty plasma. Boriskov G.V., Bykov A.I., Egorov N.I., Dolotenko M.I., Pavlov V.N., Timareva V.I. Isentropic Compression of Substances Using Ultra - High Magnetic Field: Zero Isotherms of Protium and Deuterium in Pressure Range up to ~ 5 Mbar // Contributions to Plasma Physics 2011, T. 51, № 4, С. 339 – 348 Russian Federal Nuclear Center (VNIIEF), Sarov, Russia Experiments on isentropic compression of a substance using a high magnetic field pressure are described. Their goal is building of a zero isotherm in a multi - megabar pressures range. A method of the pressure and density determination of the compressed substance based on radiographic data obtained in the experiment is presented. The results of the experiments with solid ( in initial state ) protium and deuterium are presented. The densities that correspond to more than seventeen - fold compression are reached. Obtained experimental points are compared with extrapolation of a curve that is built in the experiments using anvil cells and with the results of several ab – initiocalculations. Gorbatenko M. V., Neznamov V. P. A Modified Method for Deriving Self - Conjugate Dirac Hamiltonians in Arbitrary Gravitational Fields and Its Application to Centrally and Axially Symmetric Gravitational Fields // http://arxiv.org/abs/1107.0844, 21 Oct 2011 ( this version, v. 5 ) 39 pages Russian Federal Nuclear Center (VNIIEF), Sarov, Russia We have proposed previously a procedure for constructing self - conjugate Hamiltonians Hη in the η - representation with flat scalar product to describe the dynamics of Dirac particles in arbitrary gravitational fields. In this paper, we prove that for block - diagonal metrics the quantitiesH? can be obtained in particular using «reduced» parts of Dirac Hamiltonians, i.e. expressions for Dirac Hamiltonians derived at use of tetrad vectors in the Schwinger gauge without or with small numbers of summands with bispinor connectivities. With a glance of these results we propose the modified method of construction of Hamiltonians in the eta - representation with a significantly smaller amount of required calculations. Using the proposed procedure, in this paper we for the first time find self - conjugate Hamiltonians for a number of metrics, including the Kerr metric in coordinates of the Boyer - Lindquist, the Eddington - Finkelstein, Finkelstein - Lemaitre, Kruskal metrics, and metrics of the Clifford torus geometry. Neznamov V. P. I. The Isotopic Foldy - Wouthuysen Representation and Chiral Symmetry // http://arxiv.org/abs/1107.0691, 27 Dec 2011 (this version, v. 3) 37 pages Russian Federal Nuclear Center (VNIIEF), Sarov, Russia The paper introduces the isotopic Foldy - Wouthuysen representation. This representation was used to derive equations for massive interacting fermion fields. When the interaction Hamiltonian commutes with the matrix, these equations possess chiral invariance irrespective of whether fermions have mass or are massless. The isotopic Foldy - Wouthuysen representation preserves the vector and axial currents irrespective of the fermion mass value. In the Dirac representation, the axial current is preserved only for massless fermions. In the isotopic Foldy - Wouthuysen representation, the ground state of fermions (vacuum) turns out to be degenerate, and therefore there is the possibility of spontaneously breaking parity ( P - symmetry ). This study considers the example of constructing a chirally symmetric quantum electrodynamics framework in the isotopic Foldy - Wouthuysen representation. A number of physical processes are calculated in the lowest orders of the perturbation theory. Final results of the calculations agree with the results of the standard quantum electrodynamics. Neznamov V. P. II. The Standard Model in the Isotopic Foldy-Wouthuysen Representation without Higgs Bosons in the Fermion Sector. Spontaneous Breaking of Parity and «DarkMatter» Problems // http://arxiv.org/abs/1107.0693, 27 Dec 2011 (this version, v. 3) 12 pages Russian Federal Nuclear Center (VNIIEF), Sarov, Russia The Standard Model with massive fermions is formulated in the isotopic Foldy - Wouthuysen representation. SU(2) × U(1) - invariance of the theory in this representation is independent of whether fermions possess mass or not, and, consequently, it is not necessary to introduce interactions between Higgs bosons and fermions. The study discusses a possible relation between spontaneous breaking of parity in the isotopic Foldy - Wouthuysen representation and the composition of elementary particles of «dark matter» Gorbatenko M. V., Neznamov V. P. Atoms and Forces of Interaction Between Elementary Particles in the Expanding Universe // http://arxiv.org/abs/1105.4709, 4 Nov 2011 (this version, v. 2) 12 pages Russian Federal Nuclear Center (VNIIEF), Sarov, Russia The earlier developed algorithm for constructing a self - conjugate Hamiltonian in the representation for Dirac particles interacting with a general gravitational field is extended to the case of electromagnetic fields. This Hamiltonian is applied to the case when the gravitational field describes the spatially flat Friedmann model, and the electromagnetic field is the Coulomb potential extended to the case of this model. The analysis of atomic systems and electromagnetic forces of interaction under the conditions of spatially flat expansion of the universe has demonstrated that the system of atomic levels does not change with cosmological time. Spectral lines of atoms in the spatially flat Friedmann model are identical at different points of cosmological time. In this case the redshift is stipulated entirely by the growth of wavelength of photons at movement in the expending universe. At the same time force of interaction between elementary particles can change with expansion of the universe. Aniskin M. V.1, Ignatova O. N.1, Kaganova I. I.1, Kalmanov A. V.1, Koshatova E. V.1, Lebedev A. I.1, Losev V. V.1, Podurets A. M.1, Polyakov L. V.1, Tkachenko M. I.1, Tsibikov A. N.1,Salischev G. A.2, Garkushin G. V.3, Razorenov S. V.3, Zocher M. A.4 Mechanical properties of tantalum with different types of microstructure under high - rate deformation // Physical Mesomechanics, 2011, T. 14, № 1 – 2, С. 79 - 84 1 Russian Federal Nuclear Center (VNIIEF), Sarov, Russia 2 Belgorod State University, Belgorod, Russia 3 Institute of Problems of Chemical Physics RAS, Chernogolovka, Russia 4 Los Alamos National Laboratory, Los Alamos, New Mexico, USA The paper presents experimental data on the mechanical behavior of coarse-grained (80 μm) tantalum and cold - forged fine - grained (1 – 2 μm) tantalum under static, dynamic and shock wave loading. The data includes σ – ε compression diagrams for a strain rate of 10-3 – 103 s-1, impact velocity dependences of the relative change in cylinder length in Taylor impact tests, and time dependences of the free surface velocity in the Ta specimens under shock wave loading. It is found that the 80- fold decrease in Ta grain size only slightly affects the strength properties of the material under static and dynamic loading. Measurements of the free surface velocity under shock wave loading at ~ 17 GPa point to a decrease in elastic precursor in the fine-grained tantalum by ~ 35 % and to an increase in its critical fracture stress by 15 – 20 % compared to those in the coarse-grained tantalum. A complex strain rate dependence of the tantalum strength properties was revealed. The microstructure of the coarse - grained Ta specimens loaded at a shock wave pressure of 20 – 130 GPa for different times was examined, and the dislocation density and the number of shear bands formed under shock wave loading were measured. Glazkov V. S., Ignatova O. N., Malyshev A. N., Nadezhin S. S., Podurets A. M., Raevsky V. A.,Tyupanova O. A. Method of research on micro- and mesoscale high - rate deformation of metals // Physical Mesomechanics, 2011, T. 14, № 3 – 4, С. 178 – 184 Russian Federal Nuclear Center (VNIIEF), Sarov, Russia The paper describes a new method of research on micro - and mesoscale high - rate ( ~ 105 - 10s-1 ) deformation of metals. The method consists in studying the collapse of cylindrical holes of initial diameter Do = 0,5 – 2 mm by shock waves of known intensity and duration. The method was tested on annealed coarse - grained Ml copper. Rodionov A. V. Complement to the «Kolgan Project» // Journal of Computational Physics, In Press, Accepted Manuscript Russian Federal Nuclear Center (VNIIEF), Sarov, Russia These notes amplify the paper by Bram V. Leer on Vladimir Kolgan and his work. They give some additional information and share the vision of Kolgan by the people coming from the same country.
|
