Electron stream polyharmonic modulation at the alternating field amplitude step
Electron stream polyharmonic modulation at the alternating field amplitude step
Yu.К. Alekseev, D.М. Petrov, and А.Р. Sukhorukov
We have considered the cascade longitudinal modulation and grouping of an electron stream passing through а succession of thin diaphragms under the assumption that on either side of each diaphragm an arbltrary set of alternating electric fields of various frequencies, amplitudes, and phases acts on the electrons. An expression for the density of the output convective current has been derived, limit transitions to some special modulator configurations have been performed, and the feasibility of efficiently controlling the first current harmonic bу simultaneous double-frequency infiuence upon the electron stream has been demonstrated.
Show AbstractВлияние неоднородных полей напряжении на эволюцию дислокационных петель в ультразвуковом поле
Влияние неоднородных полей напряжении на эволюцию дислокационных петель в ультразвуковом поле
О.В. Бубновская, Д.Л. Леготин, Н.А. Тяпунина
При помощи метода компьютерного моделирования исследована эволюция скользящих дислокационных петель под действием ультразвука с учетом неоднородных по пространству полей внутренних напряжений. Установлено, что под действием ультразвука происходит аннигиляция всех петель, а наличие неоднородных полей напряжений приводит к изменению времени жизни петель и нарушению их радиальной симметрии. Уменьшение или увеличение времени жизни зависит от взаимного расположения петли и источника неоднородного поля.
Show AbstractРасчет параметров конфокального КР-микроскопа
Расчет параметров конфокального КР-микроскопа
С.Ю. Аржанцев, Д.А. Рузметов, А.Ю. Чикишев
Описывается метод расчета параметров оптической схемы конфокального КР-микроскопа. Предложен способ подбора оптимальных параметров для конкретной экспериментальной установки. Проведено сравнение результатов теоретического расчета с имеющимися экспериментальными данными.
Show AbstractNe'v relations in tensor algebra
Ne'v relations in tensor algebra
V.I. Grigor'ev and I.Р. Denisova
Expressions are obtained for the coefficients in the expansion ofthe Nth power of an arbitrary second-rank tensor in an N-dimensional pseudo-Riemannian space. These expressions are convenient for analytical investigations. Some new relations in tensor algebra are found.
Show AbstractFinslerian nonlinear invariance and Lorentz transformations
Finslerian nonlinear invariance and Lorentz transformations
G.S. Asanov
The special-relativistic Finslerian metric function is shown to bе invariant under а nonlinear realization of Lorentz transformations.
Show AbstractThe Einstein-Podolsky-Rosen paradox and the bell inequality in а quantum system with memory
The Einstein-Podolsky-Rosen paradox and the bell inequality in а quantum system with memory
D.А. Slavnov
The Einstein-Podolsky-Rosen paradox and the Bell inequality are considered in а quantum system with memory. It is shown that if several levels of memory are assumed to exist one can oЬtain the same results as in the standard quantum mechanics. The physical interpretation in this case will bе very simple and clear.
Show AbstractThe renormgroup method for functions of many variaЫes
The renormgroup method for functions of many variaЫes
V.V. Belokurov and V.V. Kamchatnyi
Solutions to the renormgroup equations depending on two or more dimensionless combinations of some dimensional variables are examined. It is shown that, generally, the form of the functional dependence on the ratio of dimensionless variaЫes cannot bе determined bу the renormgroup method. The structure of such solutions is found for some special cases.
Show AbstractOn the theory of nonlinear plasma waves
On the theory of nonlinear plasma waves
Р.А. Polyakov
А nonlinear theory of plasma waves in а cold one-dimensional plasma is elaborated using the Lagrange formalism to describe the plasma medium and subsequently pass to the Euler variables. А new representation for nonlinear running and standing waves is obtained, and а new analytical solution for а bounded plasma is found that satisfies the necessary boundary conditions.
Show AbstractGas heating kinetics in pulse-periodic air discharge
Gas heating kinetics in pulse-periodic air discharge
V.V. Lodinev, V.М. Shibkov, and L.V. Shibkova
Gas heating kinetics has Ьееп investigated under the conditions of а pulse-periodic discharge in air. Various mechanisms of energy supply to the translational degrees of freedom of the molecular gas have Ьееп studied. It is shown that in the active phase of pulsed discharge in air, at high values of the reduced electric field $(E/n>10^{15} V/cm^2)$, gas heating proceeds at the expense of quenching the electronically excited nitrogen molecules.
Show AbstractА setup for studying drifting ionospheric disturbances
А setup for studying drifting ionospheric disturbances
V.D. Gusev, N.V. Karabanov, and D.V. Kir'anov
The paper describes an experimental automated setup designed bу the authors (Department of Physics, Moscow University) for studying drifting ionospheric disturbances.
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