the beam 
Two planeparallel wettable plates are immersed in the liquid in symmetrical positions with respect to the point of incidence of the beam on the liquid.


If detected, at the same geocentric distances (24RE) the "continuum" demonstrated a strongly variable and perturbed character, as well as a considerably larger extension of the beam over the geomagnetic latitude (10°20° and more).


It examines the effect of the field of the beam and of the inherent volumetric charge of the tag on the results of the measurements; the conditions under which this effect can be neglected are calculated.


Experiments show that under these conditions the direct flow hardly goes beyond the limits of the beam.


Inflow into the main stream takes place at every point on the lateral surface of the beam [7], with the possible exception of the region near the emitter where the acoustic field is substantially nonuniform [8].


It is also assumed that the acoustic streaming does not affect the parameters of the sound wave within the beam.


The fluid is assumed to be ideal and incompressible and its flow symmetric; the lateral bending of the beam is described by the Euler equation.


The stresses and strains arising in the beam and at its ends during impact are found.


Solutions of the dispersion equation are given for all positions of the emitting surface (arbitrary, vertical, horizontal, and critical when one of the beam propagation directions is collinear with the emitting surface).


The difference between the beamcoupling gain coefficient Γ and the absorption coefficient α increases at 647 nm from 217 to 361 cm1 with the increasing strength of a constant electric field E0 applied to the layer from 16 to 123 V/μm.


The net internal gain (difference between the beamcoupling gain coefficient Γ and the absorption coefficient α) was Γ  α = 143 cm1 under these conditions.


Therefore, the beamcoupling gain coefficient Γ and the net gain Γα have low values, which are 53 and 42 cm1, respectively, at 115 V/μm.


An analysis of the photorefractive characteristics showed that the admixture of fullerene C60 in an amount of 3 wt % to the PVK composite with 0.26 wt % SWNT leads to a twofold increase in the beamcoupling gain coefficient.


In the PVKmatrix composite containing 0.26 wt % SWNT and 3 wt % C60, the beamcoupling gain coefficient Γ of a 1550nm laser beam and the net gain Γα are 32 and ～27 cm1, respectively, at a constant field of E0 = 140 V/μm.


It is concluded that the growth of thickness of these layers is primarily caused by the spread of the beam energy density from pulse to pulse and by the presence of individual pulses with a higherthanaverage value of energy density.


The Simulation of a BeamPlasma Discharge with the Beam Current Exceeding the Limiting Vacuum Current


Results are given of simulation of the spacetime dynamics of a beamplasma discharge with the beam current exceeding the limiting vacuum current.


The method is based on the effect of capture of a highcurrent relativistic electron beam under conditions of significant overcompensation of space charge of the beam by positive background ions.


The method is based on the effect of capture of a highcurrent relativistic electron beam under conditions of significant overcompensation of space charge of the beam by positive background ions.


Analytical methods are used to obtain the criterion defining the boundary between the beam and hydrodynamic modes of motion of electrons in uniform and nonuniform electric fields for Townsend and highvoltage glow discharges.

