Propagation of Electromagnetic Pulses in an Inhomogeneous Scattering Absorbing Medium. Invariant Temporal Properties

We present analytical solutions of the Ishimaru parabolic equation for the coherence function of electromagnetic field. The equation describes the temporal properties of the pulse at the output of an inhomogeneous dissipative scattering medium. An explicit expression for the Green's function of the problem is found. It is shown that the temporal part of the Green's function has an invariant Laguerre form. Numerical results describing the shapes of the studied temporal pulses at the output of the pass interval of the medium are also given. Time scales characterizing the shapes of the Laguerre output pulses are proposed and the influence of the parameters of the medium on the properties of the resulting pulses is analyzed.     

Dynamic characteristics of an adaptive correlation autocompensator in the presence of nonstationary interference

Khar'kov Polytechnic Institute. Radioastronomy Institute, Academy of Sciences of the Ukrainian SSR. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 32, No. 3, pp. 314–320, March, 1989.     

Statistical properties of the cross-correlation functional of two normal Markovian processes

We consider the cross-correlation functional which is used in comparison and decision-making patterns. The characteristic function of this functional of two independent scalar Markovian normal complex-valued processes is calculated. The properties of the probability density of cross-correlation functional values are analyzed.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 39, No. 7, pp. 916–924, July, 1996.     

Integral quadratic functionals defined in a normal Markov two-dimensional field and their statistics

We consider the problem of distribution of an integral quadratic functional defined in a stationary two-dimensional random normal Markov field. The generating function of the random-value probability distribution of the functional is found and an approximate expression for the probability distribution is obtained. The effect of the parameters of the two-dimensional field on the statistical properties of the distribution of the considered functional is analyzed. A generalization of the solution to the case of a multidimensional stationary normal Markov field is proposed. Kharkov State Polytechnical University, Kharkov, Ukraine Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 43, No. 6, pp. 562–572, June, 2000.     

Effectiveness of an adaptive compensator with correlation feedback with fluctuations of the angle of arrival of interference

Kharkov Polytechnical Institute. Institute of Radio Astronomy, Academy of Sciences of the Ukrainian SSR. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 32, No. 2, pp. 199–204, February, 1989.     

Effect of coherent synchrotron oscillations on the spectrum of microwave radiation of electrons in storage ring

The paper studies the characteristics of the microwave radiation of relativistic electrons in a storage ring given coherent synchrotron oscillations of the particles in the beam. Within the frame work of the collective phase motion model constructed, it is shown that the band of the generated harmonics is broadened considerably and the power of the coherent losses exceeds the analogous characteristics of the radiation of a beam of particles moving independently.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 5, pp. 17–19, May, 1978.     

A method of path integration and the Landau-Pomeranchuk effect of suppression of fast particle radiation in matter

A method of path integration is used to derive the formula describing the effect of multiple scattering on the intensity of relativistic-particle coherent radiation in a crystal. It is shown that during the particle motion in a crystal the multiple scattering can exert an essential effect on the radiation at lower particle energies and in a greater frequency range than in an amorphous medium. This opens new possibilities in studies of the Landau-Pomeranchuk effect using up-to-date accelerators.