Asymmetry of the directivity diagram of the synchrotron radiation
Asymmetry of the directivity diagram of the synchrotron radiation
M.M. Khapaev, A.S. Yarov, A.V. Podvez'ko
The asymmetry of the angular distribution of the radiant power of relativistic electrons in a synchrotron is interpreted based on the proposed model of anharmonic betatron oscillations of electrons. The Krylov-Bogolyubov method is used in the analysis. The computer calculation results agree with experimental data.
Show AbstractSuppression of the charmonium production in the hadron gas
Suppression of the charmonium production in the hadron gas
R.N. Faustov, I.G. Vasilevskaya
The problem of suppression of the charmonium $J/\Psi$ production in collisions of heavy ions has been investigated. The charmonium disintegration processes in the hadron gas, $\pi +J/\Psi \to \pi +c+\bar{c}$ and $\rho +J/\Psi\to D+D$ have been considered. The results obtained suggest that the contribution of the charmonium disintegration in collisions with gas hadrons and the contribution of the quark-gluon plasma production to the charmonium $J/\Psi$ birth suppression are effects of the same order of magnitude.
Show AbstractThe effect of the electron drift velocity on the saturation current in a spherical probe
The effect of the electron drift velocity on the saturation current in a spherical probe
A.M. Devyatov, A.A. Kuzovnikov, M.A. Mal'kov
The effect of the electron drift velocity on the saturation current of a spherical probe has been determined for a diffusion regime, when it is necessary to take into account the electron sink effect. It is shown that for sufficiently large electric fields $Е$, $еЕа\ge kТ_е$ ($a$ is the probe radius and $Т_е$ is the electron temperature) the actual saturation current may notably exceed its value calculated for the case of zero drift velocity.
Show AbstractThe resonance four-wave scattering in relativistic beam plasma
The resonance four-wave scattering in relativistic beam plasma
M.V. Kuzelev, V.A. Panin, A.P. Plotnikov, A.A. Rukhadze
The nonlinear dynamics of a resonance four-wave interaction of two waveguide modes with the first and second harmonics of a charge density wave in a relativistic electron beam has been investigated. It is shown that in the case of relativistic beams there exists an unstable regime in which the second density harmonic is not excited. This phenomenon can be used to produce modulated beams with desired properties.
Show AbstractA new modification of the traveling wave method
A new modification of the traveling wave method
V.D. Gusev, S.M. Golynskii
A new approach to wave scattering problems in randomly inhomogeneous media is described. This approach is called the modified traveling wave method and is used for solving the problem of radiation propagation across a one-dimensional layer with random inhomogeneities. It is shown that for this problem the modified traveling wave method generalizes the results of previous studies and helps specify the limits of applicability of the approximations used earlier.
Show AbstractNonreciprocal effects produced by narrow light beams passing through an ultrasonic wave
Nonreciprocal effects produced by narrow light beams passing through an ultrasonic wave
O.E. Nanii, A.B. Selunskii
The amplitude and phase nonreciprocity is calculated for the interaction of oncoming light beams of finite transverse dimensions with a traveling ultrasonic wave. The ranges of the parameter values are determined for which consideration for the light beam width is essential.
Show AbstractOn the existence of a symmetric acoustic mode in a quadratic solid wedge
On the existence of a symmetric acoustic mode in a quadratic solid wedge
V.V. Krylov
It is shown that in a solid truncated wedge whose local thickness depends quadratically on its height, along with the earlier predicted countable set of antisymmetric acoustic modes localized near the apex, there can also exist a single symmetric acoustic mode. This mode is localized in the vicinity of the wedge apex, and its characteristics are close to those of Rayleigh's surface acoustic mode. The phase velocity and the field structure of the mode are calculated. The lowest-frequency boundary for the region of its existence is determined.
Show AbstractEstimates of the baroelectric effect based on the Thomas-Fermi-Dirac model
Estimates of the baroelectric effect based on the Thomas-Fermi-Dirac model
A.V. Kalev
Polarization effects at nonuniform pressures in chemically homogeneous isothermal substances have been theoretically studied on the basis of the Thomas-Fermi-Dirac model. Estimates have been obtained for the Earth's electric and magnetic fields induced by gravitational compression and rotation.
Show AbstractSome results of experimental study of energy exchange processes in a gravitational suspension flow
Some results of experimental study of energy exchange processes in a gravitational suspension flow
Yu.G. Pyrkin, S.V. Galkin, M.A. Silayev
Processes of energy exchange in a gravitational suspension flow have been experimentally studied. An equation for the transfer of the potential energy of solid particles has been derived. The anisotropy of pulsatory motions in the flow has been observed, and the possibility of turbulence production upon breakage of structures with an unstable stratification has been shown. Some peculiarities of flow motion in the regime of negative turbulent viscosity are discussed.
Show AbstractPossible reasons for the appearance of two maxima in the time variation of the intensity of gamma radiation with $E_{\gamma}$ = 2.22 MeV during solar flares
Possible reasons for the appearance of two maxima in the time variation of the intensity of gamma radiation with $E_{\gamma}$ = 2.22 MeV during solar flares
B.M. Kuzhevskii, E.I. Kogan-Laskina, E.V. Troitskaya
Possible reasons for the appearance of two maxima in the time variation of the intensity of $\gamma$ radiation with $E_{\gamma}$ = 2.22 MeV during the solar particle event of June 7, 1980 have been analyzed. It was concluded that these maxima were caused by the anisotropy of the neutron scattering by hydrogen and by the inhomogeneity of the solar atmosphere density in the subphotospheric area during the particle event.
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