Плазмохимические реакции в разрядах высокого давления, возбуждаемых пучком СВЧ-волн// Всесоюзное совещание "Высокочастотный разряд в волновых полях"
The paper presents to theoretical and experimental investigation of the plasma source on the basis of the electrodeless microwave discharge in a mode of electron cyclotron resonance. Steady interest in the sources of plasma of this type is defined as insufficiently complete study of physical phenomena accompanying the microwave discharge, and the perspective of its application in ion accelerators, and also for creation of a nonequilibrium plasma in plasma chemical reactors. Source plasma excited by microwave discharge in a cylindrical resonator with dielectric walls, placed in a non-uniform axial-symmetrical magnetic field of a permanent ring magnet. To create electromagnetic oscillations such E01 in cylindrical resonators used broadband enter the microwave energy, which is a conical transformer attached to the dielectric window in the end. Frequency range, the amplitude of the electromagnetic waves and spatial change of magnitude of a magnetic field induction had been chosen the way that the conditions of electron cyclotron resonance can be created in a quite large volume of cylindrical resonator. Modeling matching transformer made using MICROWAVE STUDIO software v 5.0.0. Experimental study of microwave discharge carried out in the range of 3.2 - 3.9 GHz. The investigated area of the glow discharge, as well as the dependences of the standing wave ratio (VSWR) frequency and power generator are in good qualitative agreement with the results of mathematical modeling of electromagnetic fields in the resonator region of the plasma generator. The study has found that the complex structure of the discharge at low gas pressure is determined by the configuration of a strongly inhomogeneous magnetic field. Thus the ignition and burning of the discharge can occur only due to the oscillating electrons, which do not leave the discharge and can ionize the neutral gas molecules.
The dynamics of a two-component Davydov-Scott (DS) soliton with a small mismatch of the initial location or velocity of the high-frequency (HF) component was investigated within the framework of the Zakharov-type system of two coupled equations for the HF and low-frequency (LF) fields. In this system, the HF field is described by the linear Schrödinger equation with the potential generated by the LF component varying in time and space. The LF component in this system is described by the Korteweg-de Vries equation with a term of quadratic influence of the HF field on the LF field. The frequency of the DS soliton`s component oscillation was found analytically using the balance equation. The perturbed DS soliton was shown to be stable. The analytical results were confirmed by numerical simulations.
Radiation conditions are described for various space regions, radiation-induced effects in spacecraft materials and equipment components are considered and information on theoretical, computational, and experimental methods for studying radiation effects are presented. The peculiarities of radiation effects on nanostructures and some problems related to modeling and radiation testing of such structures are considered.