On theory of cascade energy exchange between an electron and an open resonator field
On theory of cascade energy exchange between an electron and an open resonator field
Yu.K. Alekseev, l.Yu. Krasovskaya, and А.Р. Sukhorukov
Cascade energy exchange between longitudinal alternating electric field of an open resonator and an electron beam passing through а series ofthin diaphragms with small apertures located in the resonator field, has been discussed. Formulas have been derived for the output velocity and electronic efficiency of а thin cluster. А mathematical and numerical model has been constructed for the description of this interaction in kinematic approximation with regard to the electron volume charge. Based on this model, estimates of the interaction efficiency and the admissible phase and velocity variations have been made. The possiЬility to reduce essentially the field strength required for efficient deceleration of the beam electrons has been demonstrated.
Show AbstractOptimization of film thickness and thermal diffusivity measurement Ьу thermal wave method
Optimization of film thickness and thermal diffusivity measurement Ьу thermal wave method
А.А. Karabutov, V.V. Кlevitsky, А.Р. Kubyshkin, and V.Ya. Panchenko
The proЬlem of noncontact determination of thermophysical characteristics of а thin layer with the help of laser-induced thermal waves is theoretically studied. The finiteness of the laser beam diameter makes it possiЫe to find the thickness of the layer and its thermal diffusivity independently of one another. The authors analyze pulsed and continuous modes of thermal wave excitation and discuss the proЬlem of choice of optimal conditions for а particular sample under study.
Show AbstractА spectrophotometric study of thin films inhomogeneity
А spectrophotometric study of thin films inhomogeneity
Yu.A. Bobrovnikov, A.V. Kozar', K.V. Popov, A.N. Tikhonov, A.V. Tikhonravov, and М.К. Тrubetskov
The present paper considers the possibility of using the spectrophotometric method for studying the thin films inhomogeneity. А hierarchic approach to the construction of mathematical models of investigation of thin films is put forward.
Show AbstractMoЬility of samarium atoms in hydrogen-saturated
MoЬility of samarium atoms in hydrogen-saturated
G.P. Revkevich, М.К. Mitkova, and А.А. Katsnelson
The X-ray diffraction pattern of а sample of а Pd-Sm alloy has been studied. It has been experimentally found that, as а result of saturation with hydrogen at room temperature, а two-phase sample is turned into а single-phase state. The process has taken 10-15 days. The rate of diffusion of samarium atoms in the presence of hydrogen increased Ьу 4 or 5 orders of magnitude.
Show AbstractLow-temperature electron moЬilities in subbands of dimensional quantization in comЬined-doped GaAs/Al$_x$Ga$_{1-x}$As heterostructures
Low-temperature electron moЬilities in subbands of dimensional quantization in comЬined-doped GaAs/Al$_x$Ga$_{1-x}$As heterostructures
R.A. Lunin, V.G. Kytin, V.A. Kulbachinsky, and G.A. Mironova
The Shubnikov-de Haas effect, the quantum Hall effect and the electric transport
properties of GaAs/Al$_x$Ga$_{1-x}$As heterojunctions have been studied, in which the Al$_x$Ga$_{1-x}$As layer is homogeneously doped with silicon and the GaAs layer is simultaneously 8-doped with different distances L5{200А
Extraordinary Nernst-Ettingshausen effect in magnetic granular alloys
Extraordinary Nernst-Ettingshausen effect in magnetic granular alloys
A.V. Kalitsov, M.G. Chshiev, and N.I. Tsidaeva
The paper concerns а theoretical study of the behavior of the extraordinary Nernst-Ettingshausen effect {ENEE} in magnetic granular alloys. Calculations have been made within the framework of the Zhang-Levi model. The authors consider an asymmetric scattering of spin-polarized electrons on impurities that occurs under the action of а spin-orЬital interaction. It has been shown that in granular alloys with surface scattering playing а significant part, the value of the ENEE coefficient $Q_s^b$ may Ье substantially higher than the ENEE coefficient $Q_s^b$ for а homogeneous ferromagnetic material; moreover, the coefficients $Q_s$ and $Q_s^b$ may have different signs.
Show AbstractStructure of intense convective humid-type air vortices
Structure of intense convective humid-type air vortices
Е.Р. Anisimova, А.М. Nikolaev, А.А. Speranskaya, and O.N. Chernyshev
Physical modeling data are used for classifying intense convective humid-type vortices. It is shown that the criterion that determines the vortex structure in this class is Froude's thermal number Fr* =(ϑ_∞^2)/(Rg∆T/T_∞)
Show AbstractСвободные колебания внутреннего ядра Земли для неравновесной модели Земли
Свободные колебания внутреннего ядра Земли для неравновесной модели Земли
С.Л. Пасынок
Решена задача о влиянии оболочки земного ядра на колебания внутреннего ядра Земли. Получены уточненные (по сравнению с Шлихтером и Буссе) формулы для частот колебаний. Оказалось, что выбор модели оболочки мало влияет на частоту колебаний и значительно влияет на смещение ядра.
Show AbstractResonance three-wave interactions of seismic waves in viscoelastic geomedia
Resonance three-wave interactions of seismic waves in viscoelastic geomedia
S.A. Arseniev and N .К. Shelkovnikov
А theoretical model has been derived for nonlinear parametric interactions between seismic waves traveling in the geomedium. Formulas have been derived for particular calculations.
Show AbstractHigher order disturbances in а three-body stellar problem
Higher order disturbances in а three-body stellar problem
N.A. Solovaya
А canonical system of differential equations for а disturbed motion of the threebody stellar problem has been obtained. An analytical method of solution with consideration for the third and fourth order terms in the Hamiltonian of the problem has been developed. Secular parts of angular variables g1 and g2 in the arguments of cosines have been introduced as the new variables.
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