Electron radiation in an electromagnetic axial trap
Electron radiation in an electromagnetic axial trap
A.I. Toropova
A trap variant, where particles move in a homogeneous stationary magnetic field and in an electrostatic field produced by two equipotential planes and an axial surface of revolution, has been proposed. A solution of canonical equations has been found. It has been demonstrated that interaction of electrons with the radiation field leads to suppression of a parametric resonance. A model trap considering the finite conductivity of resonator walls and losses due to ollisions with gas has been studied.
Show AbstractDynamics of formation of fractal clusters from laser flare
Dynamics of formation of fractal clusters from laser flare
N.E. Kask, G.M. Fedorov
The formation of fractal clusters during laser-induced vaporization of (Ce$_2$O$_3$)$_x$(CeF$_3$)$_{1-x}$ and ((CeO$_2$)$_x$(CeF$_3$)$_{1-x}$ mixtures was studied by light scattering techniques. The scaling exponents of the cluster-size distribution function were determined. The obtained results were compared with the literature data, and the mechanism of fast formation of fractal clusters from percolation structures existing in laser flare was discussed.
Show AbstractPhotosynthesis inhibitor and activator effects on the luminescence parameters of bean leaves
Photosynthesis inhibitor and activator effects on the luminescence parameters of bean leaves
V.A. Karavaev$^1$, I.B. Polyakova$^1$, M.K. Solntsev$^1$, T.P. Yurina$^1$, E.A. Kuznetsova$^2$, A.M. Kuznetsov$^1$
Slow fluorescence induction and thermoluminescence of bean leaves treated with a photosynthesis inhibitor (diuron) and a photosynthesis activator were studied. A positive correlation between relative fluorescence quenching during slow induction and steady-state photosynthesis intensity was observed. Diuron and the activator were found to shift the maximum of thermoluminescence to lower and higher temperatures, respectively.
Show AbstractOn the theory of isotopic effects in high-temperature superconducting compounds
On the theory of isotopic effects in high-temperature superconducting compounds
A.V. Vedyaev, A.M. Savchenko, M.A. Savchenko, A.V. Stefanovich
Isotopic effects in high-$T_{c}$ systems are considered. For strong spin-phonon coupling, the calculated isotopic effect index is substantially lower than the classical index for low-$T_{c}$: superconductors. The isotopic effect indices of high-$T_{c}$: systems such as $\rm{La}_{2-x}\rm{Sr}_x\rm{CuO}_4$ and $\rm{YBa}_2 \rm{Cu}_3 \rm{O}_{7-y}$ are calculated from the dependence of the inverse exchange correlation length on the ion mass. This dependence can be obtained in the limit of maximum amplification of effective electron-phonon coupling by spin fluctuations of exchange nature. The theoretical estimates are compared with the experimental data.
Show AbstractOn the biogenic origin of magnetite and greigite in water basin sediments and soils
On the biogenic origin of magnetite and greigite in water basin sediments and soils
V.F. Babanin$^1$, V.I. Trukhin$^2$, N.V. Verkhovtseva$^3$, A.M. Shipilin$^1$
The results of long-term observations of the formation of magnetically ordered minerals in the cenosis of natural ooze microorganisms are presented. Using the magnetic measurements and the M$\stackrel{..}{o}$ssbauer spectroscopy, the composition of iron-containing minerals has been monitored. The X-Ray diffractometry and light microscopy were also applied to investigating the ooze magnetic fraction. The formation of magnetite and greigite has been established, leading to increased values of the ooze magnetic parameters. The residual magnetization exceeds the natural magnetization of soils by 4-5 orders of magnitude. The saturation magnetization and the initial magnetic susceptibility have respectively increased by 3 orders of magnitude and by a factor of 15.
Show AbstractOn the origin of ocean synoptic variability
On the origin of ocean synoptic variability
S.A. Arsen'ev, N.K. Shelkovnikov
It is shown that planetary waves in the ocean are generated by the Earth's nonuniform rotation. The theoretical estimating formulas are obtained.
Show AbstractInvestigations of solar activity from the "Heliostationary" orbit
Investigations of solar activity from the "Heliostationary" orbit
N.N. Kontor, B.V. Somov
The scientific potential of the "Heliostationary" space experiment with respect to the key problems of the solar activity is discussed.
Show AbstractAsymptotic calculation of electromagnetic processes in highly inhomogeneous nonconducting media
Asymptotic calculation of electromagnetic processes in highly inhomogeneous nonconducting media
G.N. Medvedev, B.I. Morgunov
Electromagnetic processes in nonconducting isotropic inhomogeneous media are considered. Characteristics of the medium are markedly varying in several directions. To determine the electric and magnetic fields, the asymptotic methods are employed.
Show AbstractOn the root vectors of a waveguide with composite filling
On the root vectors of a waveguide with composite filling
A.N. Bogolyubov, A.L. Delitsyn, A.G. Sveshnikov
The problem of completeness of the system of root vectors of a waveguide is considered. A new approach that reduces the problem to studying a linear operator bunch is applied. Theorems of completeness of the bunch root vectors and of the spectrum discreteness are formulated.
Show AbstractPolarization bremsstrahlung of fast electrons in a weakly ordered medium
Polarization bremsstrahlung of fast electrons in a weakly ordered medium
V.S. Blazhevich, V.K. Grishin, B.S. Ishkhanov, N.N. Nasonov, V.P. Petukhov, A.S. Chepurnov, V.I. Shvedunov
The results of experimental investigation of the polarization or atomic bremsstrahlung of electrons with the energy of 2.4 MeV in a weakly ordered medium of tinsel aluminum with a quasiamorphous structure are discussed. The measurements have been carried out on the linear accelerator at the Research Institute of Nuclear Physics, Moscow State University. The experimental data are in a satisfactory agreement with the theoretical estimates.
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