New types of beam-plasma devices generating intense stochastic microwave radiation in the interaction of electron beams with hybrid plasma waveguides were developed and put into operation at the National Science Center Kharkov Institute of Physics and Technology (Ukraine). The objective of the paper is to discuss the results of theoretical and experimental studies and numerical simulations of the normal and oblique incidence of linearly polarized electromagnetic waves on an interface between a vacuum and an overcritical plasma. The main results of the reported investigations are as follows: (i) for the parameter values under analysis, the transmission coefficient for microwaves with a stochastically jumping phase is one order of magnitude greater than that for a broadband regular electromagnetic wave with the same spectral density; (ii) the electrons are heated most efficiently by obliquely incident waves with a stochastically jumping phase and, in addition, the electron distribution function has a high-energy tail; and (iii) necessary conditions for gas breakdown and for the initiation of a microwave discharge in stochastic fields in a light source are determined. The anomalously large transmission coefficient for microwaves, the anomalous character of the breakdown conditions, the anomalous behavior of microwave gas discharges, and the anomalous nature of collisionless electron heating, are attributed to stochastic jumps in the phase of microwave radiation

The experimental temperature dependence of the resistivity of platinum in different structural states is processed using the two-band Mott–Wilson model of a transition metal. It is found that impurities, deformation defects, and quenching defects have essentially different influences on the Debye temperature, the intensity of electron–electron Coulomb scattering, and the intensity of intra- and interband electron–phonon scattering. A number of effective microscopic characteristics and band parameters are calculated in the Friedel model. The mechanisms by which the different structural factors influence the investigated complex of physical characteristics of platinum are analyzed.

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Absfracr-Thepeculiarilies of thepulsed discharge at afmospheric pressure behveen mulfiple needles and plane demode have been irivesfigufed by means of fhe opficol registrarion method of discharge for each needle. This type of discharge has been used in our experimenfs as on available fool for plasma chemisfry of CO, NO, -" I SO, , i.e. for effecfive decomposition of lhese radicals. The main ndvnnfage of il concludes IO a phenomenon of spark jumping from one needle Io onofhcr over whole volume of the Ireofedgas.