Hydrodynamic description of waves in a relativistic plasma with allowance for radiative deceleration
Hydrodynamic description of waves in a relativistic plasma with allowance for radiative deceleration
L.S. Kuz'menkov and P.A. Polyakov
Linear oscillations of a relativistic plasma are investigated with consideration of radiative deceleration in the hydrodynamic approximat ion. A relativistically invariant dispersion relation is obtained and analyzed for a stationary plasma in the absence of external fields, for a plasma moving at a constant average velocity, and for waves propagating parallel and perpendicular to an external magnetic field. It is shown that the energy losses in collective emission of electrons results in damping of all types of plasma oscillations. This damping exceeds the Landau damping for waves in a plasma with density $n≥10^9$ cm^3, whose phase velocities are at least an order of magnitude higher than the electron thermal velocity.
Show AbstractDecay of a quasistationary state in the presence of a nonstationary perturbation
Decay of a quasistationary state in the presence of a nonstationary perturbation
V.I. Grigor'ev and E.R. Lubenets
The influence of a time-dependent perturbation on the probability of tunneling of a particle through a barrier is considered on the basis of solution of the nonstationary Schroedinger equation.
Show AbstractDistribution of the intensity of an electric field resonance-type systems
Distribution of the intensity of an electric field resonance-type systems
A.V. Kozar, V.S. Kolesnikov, and Yu.A. Pirogov
The method of impedance characteristics is used to discuss the distribution of an electric field in multilayer resonance-type systems capable of amplifying the amplitude of the incident field inside the system by Interference effects. Analytic relationships for the intensity of an electric field in layers of different structures are derived using real parameters of dielectrics.
Show AbstractOn the theory of superconductivity in a disordered system
On the theory of superconductivity in a disordered system
V.L. Bonch-Bruevich and A.B. Timofeev
In this paper we examine the possibility of the occurrence of superconductivity in a disordered system. In view of the results obtained here, we discuss the possibility of superconductivity in amorphous semiconductors in which the free charge carriers are created in sufficient number by the action of light.
Show AbstractPeriodic motions of an axisymmetric satellite about the center of mass on a circular orbit (I)
Periodic motions of an axisymmetric satellite about the center of mass on a circular orbit (I)
Yu.V. Barkin and A.A. Pankratov
Poincare's small-parameter method for Hamiltonian systems is used to investigate the existence of periodic solutions in the problem of rotational motion of an axisymmetric satellite about its center of mass on a circular orbit. The motion of the satellite is described by Andoyer's canonical osculating elements. Analytic conditions are obtained for the existence of Schwarzschild and Poincare periodic solutions and they are investigated qualitatively and numerically.
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