Peculiarities of working regimes of electron detector of two millimiter range with open resonance system with periodic structure
Peculiarities of working regimes of electron detector of two millimiter range with open resonance system with periodic structure
D.G. Afоnin, A.I. Коstienkо
We discuss the characteristic features of operation regimes of an electron detector, operating in the two-millimeter range, with a virtual cathode, and an open resonant system with a period structure. We describe the construction, and give the dimensions, of the individual units. The device operation is based on the interaction of an electron beam with the forward and backward spatial harmonics; the device also operating in the diffraction regime. The current sensitivity of the detector varied across the range, and decreased significantly when going over from the diffraction regime to the travelling-wave and backward- wave regimes.
Show AbstractSolvation influence on the Brown's rotation of benzocarbolyn in alcoholic solutions
Solvation influence on the Brown's rotation of benzocarbolyn in alcoholic solutions
L.V. Levshin, Yu.R. Pavlenko, E.K. Ruuge, B.D. Ryzhikov, N.R. Senatorova, A.N. Tikhonov
The methods of optical and EPR spectroscopy, are used to show that the deviations from linear dependence of 1/P and T/ɳ in the Levshin-Perrin formula for ethanol solutions of benzocarboline are due to the temperature dependences of the lifetime of the excited state, and of the solvated volume of molecules of the dissolved substance. It is proved that it is justified to use a spherical model for the discussion of Brownian rotation of benzocarboline molecules.
Show AbstractThe model of formation of temperature inversion in a thin near-water atmospheric layer
The model of formation of temperature inversion in a thin near-water atmospheric layer
A.A. Budnikov
We consider an approximate mathematical model which takes into account the main factors in the interaction of the ocean and the atmosphere It is found that, in the framework of the present model, a temperature inversion layer Is formed by the action of volume heat sources in the atmosphere.
Show AbstractDevice for perfoming of multifrequency selective experiments by the regenerative NMR method
Device for perfoming of multifrequency selective experiments by the regenerative NMR method
K.L. Zakharov, Yu.S. Konstantinov, A.M. Smirnov
We developed an apparatus for multifrequency.experiments by using the regenerative NMR methods. The apparatus makes it possible to excite spin generation at individual lines in the NMR spectrum if the difference of resonance frequencies between the lines exceeds 4 Hz. We give an example of application of this apparatus in the experimental observation of nuclear magnetic double resonance.
Show AbstractPecularities of adopted antenna systems consisting of independent loaded vibratiors
Pecularities of adopted antenna systems consisting of independent loaded vibratiors
G.P. Boyakhchyan, V.A. Vanke, S.K. Lesota
We study the physical features of systems which consist of independently loaded dipoles. An example of such a system is rectenna (rectifying antenna). It is shown that the characteristics of these systems coincide with the transmitting characteristics of a system of the same dipoles with mutually incoherent excitation. The system of dipoles with independent loads has a relatively low directionality because of the absence of coherent amplification or reduction of the field in the appropriate directions, which is typical for systems with coherent excitation of the dipoles.
Show AbstractOn the shock wave propagation law in the point explosion theory
On the shock wave propagation law in the point explosion theory
D.V. Skripkin
The method of dimensionality theory is used to obtain a formula for the velocity of a shock wave which makes it possible to reduce the problem of explosion at the center of a gas sphere, to a problem with initial Cauchy data at the front of the shock wave.
Show AbstractMutual diffusion coefficient of nitrobenzene— n-heptane system
Mutual diffusion coefficient of nitrobenzene— n-heptane system
S.V. Kazakov, N.I. Chernova
We study the temperature and concentration dependence of interdiffusion coefficient in the nitrobenzene-heptane system. We obtain numerical values for the exponent which determines the singular behavior of the diffusion coefficient as one approaches the critical point of mixing.
Show AbstractThe study of threshold and intensity of SRS in the rubidium vapour at the various spectral ranges of pump radiation
The study of threshold and intensity of SRS in the rubidium vapour at the various spectral ranges of pump radiation
V.A. Mikhaylov, V.I. Odintsov
We study experimentally the frequency dependence of the excitation threshold and the intensity of induced Raman scattering in rubidium vapor near the resonant transitions Rb 5$^{2}$S$_{1/2}—5^{2}Р_{1/2,3/2}$, while varying the pumping line-width between 0.2 and 20 cm$^{-1}$. In the immediate vicinity of resonance, we observe a sharp increase of the threshold and a decrease of intensity of the induced Raman scattering. In contrast with the backward scattering, under excitation of the forward induced Raman scattering the maximum of the scattered radiation is reached at large deviations from resonance of the order of several tens of cm$^{-1}$.
Show AbstractInvestigation of the dynamical properties of a fourth-oder system with one limiting point by the root-trajectory method
Investigation of the dynamical properties of a fourth-oder system with one limiting point by the root-trajectory method
G.A. Bendrikov, V.I. Miftakhov
The family of root trajectories of a fourth-order system with the characteristic equation(a$_0$p$^{4}$+a$_1$p$^3$+a$_2$p$^2$+a$_3$p+a$_4$+K(b$_0$p+b$_1$)=0 is investigated. Having determined the types of root trajectory, their analysis leads to the establishment of general properties, allowing calculations of such systems to be more expediently performed.
Show AbstractRadial distribution of Xe atoms in the positive column of a glow discharge in an He—Xe mixturе
Radial distribution of Xe atoms in the positive column of a glow discharge in an He—Xe mixturе
L.M. Volkova, A.M. Devyatov, E.A. Kral'kina, L.V. Shibkova
In plasma of a helium-xenon discharge, the radical distribution of xenon atoms due to cataphoresis is investigated as a function of the partial pressures of helium and xenon, the discharge current, and the distance from the cathode. The experimental results are compared with theoretical calculation.
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