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21.
L.G. Korzunin B.N. Filippov F.A. Kassan-Ogly I.A. Chaikovsky 《Journal of magnetism and magnetic materials》2006
On the basis of numerical minimization of total energy in magnetic triaxial ferromagnetic films with a surface of a (1 1 0)-type, we investigated two-dimensional structures of domain walls within a rigorous micromagnetic approach that takes into account all the main interactions including the dipole–dipole one. Novel two-vortex and three-vortex domain wall structures are established to exist. The profiles of domain wall structures and their stability regions are studied. 相似文献
22.
S. Larkin S. Anischenko V. Chaikovsky 《International Journal of Infrared and Millimeter Waves》1998,19(5):749-754
We describe an informatively alternative algorithm to the known algorithm of Hilbert transform spectrometry of incoherent radiation in millimeter and submillimeter wave bands. The synthesized algorithm for measuring autocorrelation functions of incoherent radiation is based on the use of manifestation of the ac Josephson effect in superconducting junctions irradiated by the radiation studied. As compared to the Hilbert transform spectroscopy algorithm the synthesized correlation analysis algorithm is characterized by a high accuracy and functional simplicity. 相似文献
23.
The electrical explosion of aluminum wires is numerically simulated in the magnetohydrodynamic approximation for the current density ranging from 107 to 1010 A/cm2 and times to explosion varying from 10?10 to 10?6 s. It is shown that, at current densities of 108?109 A/cm2, low-temperature explosion conditions change to high-temperature ones, when inertial forces preventing the wire dispersion play a decisive role. This transition is accompanied by a sharp change in the thermodynamic parameters (the temperature and the energy deposited into the wire by the instant of explosion increase by several times), and the action integral for this transition increases smoothly approximately threefold as the explosion characteristics (current density and time to explosion) change by two orders of magnitude. The instant of transition from the low-temperature explosion to the high-temperature one depends on the radial dimensions of an exploding wire and does not depend on the properties of the environment. 相似文献
24.
Vit. M. Bystritskii V. M. Bystritsky S. A. Chaikovsky M. Filipowicz V. M. Grebenyuk E. Guła V. I. Makhrin G. A. Mesyats S. S. Parzhitski F. M. Pen’kov N. A. Ratakhin V. A. Sinebryukhov S. A. Sorokin V. A. Stolupin E. N. Volkov J. Woźniak 《Physics of Atomic Nuclei》2001,64(5):855-860
Experimental results are presented that were obtained by measuring the astrophysical S factor for dd interaction at very low deuteron collision energies by using the liner-plasma technique. The experiment was performed at the high-current generator of the High-Current Electronics Institute (Tomsk, Russia). The values found for the S factor at the deuteron collision energies of 1.80, 2.06, and 2.27 keV are S dd=114±68, 64±30, and 53±16 keV b, respectively. The corresponding dd cross sections obtained as the product of the barrier factor and the measured astrophysical S factor are σ dd n (E col=1.80 keV)=(4.3±2.6)×10?33cm2, σ dd n (E col=2.06 keV)=(9.8±4.6)×10?33cm2, and σ dd n (E col=2.27 keV)=(2.1±0.6)×10?32cm2. 相似文献
25.
A. G. Rousskikh V. I. Oreshkin A. Yu. Labetsky S. A. Chaikovsky A. V. Shishlov 《Technical Physics》2007,52(5):571-576
The effect of the environmental pressure on the electrical explosion of a conductor (fine tungsten wire of diameter 30 μm) in an insulating liquid (distilled water) is studied. The pressure in the water is produced by exploding a multiwire array with the test conductor on its axis. Along with the experiment, the magnetohydrodynamic simulation of the explosion is carried out. It is shown that a high pressure produced in the explosion zone retards the electrical explosion of the conductor and, consequently, increases the explosion energy. 相似文献
26.
The experiments on explosion of cylindrical conductors aimed at comparison of plasma formation during skin explosion of homogeneous and double-layer conductors with an external layer with a lower conductivity are carried out on a high-current MIG generator (current amplitude up to 2.5 MA and current rise time 100 ns). The generator is loaded with cylindrical copper conductors with a diameter of 3 mm on the cathode part of which a titanium layer of thickness 20, 50, and 80 μm is deposited in vacuum. This type of loading makes it possible to compare the behaviors of the homogeneous and double-layer conductors in identical conditions. It is shown that using the double-layer structure of the conductor with an external layer of thickness 20–80 μm with a lower conductivity, which is obtained by vacuum arc deposition, higher values of magnetic induction (as compared to homogeneous conductor) can be attained on its surface prior to plasma formation and spread. 相似文献
27.
Miatselskaya N. S. Bril A. I. Chaikovsky A. P. Yukhymchuk Yu. Yu. Milinevski G. P. Simon A. A. 《Journal of Applied Spectroscopy》2022,89(2):296-302
Journal of Applied Spectroscopy - The application of the optimal interpolation method to assimilation in the chemical transport model of observational data of the aerosol optical thickness (AOT)... 相似文献
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29.
Shashwati Sen DK Aswal Ajay Singh TV Chandrasekhar Rao KP Muthe JC Vyas LC Gupta SK Gupta VC Sahni 《Pramana》2002,58(5-6):867-870
The MgB2 superconductor, synthesized using solid-state and liquid-phase sintering methods, have been characterized for various properties.
The upper critical field, irreversibility line and critical current density have been determined using magnetization data.
The current-voltage characteristics recorded under an applied magnetic field revealed the existence of vortex glass transition.
The surface analysis using X-ray photoelectron spectroscopy shows that MgB2 is sensitive to atmospheric degradation. 相似文献
30.
The Hamiltonian dynamics of a particle moving in a nearly periodic two-dimensional (2-D) potential of square symmetry is analyzed. The particle undergoes two types of unbounded stochastic or random walks in such a system: a quasi-1-D motion (a "stochastic channeling") and a 2-D motion which results from a sort of stochastic percolation. A scenario for the onset of this stochastic percolation is analyzed. The threshold energy for percolation is found as a function of the perturbation parameter. Each type of random walk has the property of intermittency. The particle transport is anomalous in certain energy intervals. 相似文献