Перегляд за автором "Gritsunov, A. V."
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Публікація A matrix electrodynamics as an analogue of the Heisenberg’s mechanics(2008) Gritsunov, A. V.A matrix approach to solving the electrodynamic problems is suggested. The specificity of one is treatment of an electrodynamic system (ES) as an oscillating system with a finite number of the degrees of freedom. The ES is considered as a set of spatially localized so-called partial oscillators (oscillets). Matrices of unit mutual pseudoenergies and unit mutual energies of the oscillators are evaluated. The eigenfrequencies and the eigenfunctions of the ES can be calculated basing on the lumped elements oscillating system matrix theory. A matrix second-order ordinary differential equation is solved for excited potentials of the ES instead of the D’Alembert equation. The main advantage of the matrix electrodynamics is substitution of the solving the partial derivative differential equations by the less computationally intensive linear algebra problems and the ordinary differential equation integration.Публікація A Matrix Electrodynamics: A Similarity to the Heisenberg’s Mechanics?(2008) Gritsunov, A. V.; Veryovkina, A.A matrix approach to solving the electrodynamic problems is described. This specificity consists in the treatment of an electrodynamic system (ES) as an oscillating system with a finite number of the degrees of freedom. The ES is considered as a set of spatially localized partial oscillators (oscillets). Matrices of unit mutual pseudoenergies and unit mutual energies of the oscillators are evaluated. The ES eigenvalues, eigenfunctions and excited potentials can be calculated then basing on the lumped element circuit matrix theory. The main advantage of such approach is substitution of the partial derivative differential equations with the linear algebra problems and the ordinary differential equations.Публікація A self-consistent potential formalism in the electrodynamics(2009) Gritsunov, A. V.An attempt is made to complete logically the potential formalism in the electromagnetic theory basing on treatment of the Minkowski space-time as an electromagnetic oscillating system with distributed parameters. The Lagrange function and the energy-pulse four-vector density for the system are written using no the electromagnetic field tensor. Some physical consequences of the offered mathematical tool implementation are considered.Публікація Advanced design of re-entrant beam distributed-emission crossed-field tubes(IEEE, 2000) Frolova, T. I.; Churyumov, G. I.; Gritsunov, A. V.; Terehin, S. N.The computed and measured results for re-entrant beam, distributed emission, crossed-field tubes are presented. The computer modelling is carried out by a particle-in-cell method (PIC method) in quasi-periodic, single-mode and non-relativistic approximations. The PIC method provides an accurate means to accomplish the computer modelling of classical continuous-wave magnetron generators including the low-voltage magnetron as well as the millimeter wave magnetron. The 3D self-consistent mathematical model of the non-traditional magnetron generator (combined magnetron) is considered.Публікація Electron-Positron Matter Waves as Oscillations of Minkowski Spacetime(2014) Gritsunov, A. V.An attempt is made to generalize the basic idea of the self-sufficient potential formalism in electrodynamics (interpretation of electromagnetic phenomena as natural or forced oscillations of the Minkowski spacetime treated as a distributed electromagnetic oscillating system) on the De Broglie waves. Both electrons and positrons are considered as excited modes (oscillations) of a distributed electronpositron oscillating system, not as "hard" particles. Thus, the matter waves are treated as real oscillations of the Minkowski spacetime, not as Born's "probability waves".Публікація Evaluation of Unsteady Non-Harmonic Fields in Microwave Devices. I. Decomposition in the Partial Modes(2005) Gritsunov, A. V.Decomposition of electrodynamic line field in so-called partial modes is described. It can be useful for the matched lines, where decomposition in the line eigenmodes is unsuitable because of the continuality of their spectrum. In addition to avoidance of the Fourier integral over a continuum of the normal eigenmodes in matched lines, the partial modes are effective also in simulations of long and irregular lines. Due to the longitudinal localization of the partial modes, the field structure and the electrodynamic parameters of ones depend on the characteristic of a limited longitudinal part of the line. Therefore, only limited number of the partial modes can be taken into account in each transverse section of the line.Публікація Evaluation of Unsteady Non-Harmonic Fields in Microwave Devices. II. Decomposition in the Partial Oscillators(2005) Gritsunov, A. V.Decomposition of electrodynamic system field in a set of coupled partial oscillators (oscillets) is described. This is a "large-scale" alternative to the FDTD and FETD methods, as the oscillet "lattice" spacing is determined by physical reasons (upper bound of considered wavenumbers) rather than computational ones. The lattice approximation is adaptable to anisotropic media, because the model of coupled partial oscillators is close to the physical mechanism causing this phenomenon (i.e., the atomic oscillations). The fields in a nonlinear or non-stationary medium also can be expanded in a set of nonlinearly coupled nonlinear or parametric oscillators.Публікація Evaluation of Unsteady Non-Harmonic Fields in Microwave Devices. III. Decomposition in the Regular Modes(2005) Gritsunov, A. V.Decomposition of electrodynamic line field in so-called regular modes is described. Comparing with the partial modes, series of the regular modes ensures less "truncation" errors (caused by the Gibbs' phenomenon) at the same number of the terms. A generalized wave equation for a regular dispersive and dissipative electrodynamic line of arbitrary geometry and dispersion characteristic is derived. The classic wave equation, the Klein-Gorgon equation, and the Telegraphist’s equation are subsets of one. The advantages of using the four-vector potential, inherently taking into account the Lorenz gauge, is discussed. A full set of regular modes of the potential four-vector in a rectangular waveguide is written.Публікація Numerical Simulation of UWB Electromagnetic Pulses Propagation in Dispersive Electrodynamic Lines(2007) Gritsunov, A. V.; Ostapyuk, N. V.This paper considers a computer simulation method for ultrawideband (UWB) pulse fields excited in a regular electrodynamic line by either a short external current or by a bunched electron beam. The high-frequency components of the radio pulse move more rapidly than the low-frequency ones, the first overtake the latter after some time. The delay line does not transmit the low-frequency components of the video pulse at all, so this turns into a radio pulse gradually passing some distance.Публікація On Estimating the Electromagnetic Pollution(2011) Gritsunov, A. V.The problem of artificial electromagnetic background in cities is of the same importance as problems of chemical, acoustic, thermal etc. pollutions. Known field methods of the electromagnetic pollution evaluating are not quite adequate if the electromagnetic influences onto biological objects are analyzed, because those are essentially quantum systems. A self-sufficient potential formalism is more promising. This theory predicts the existence of so-called Zero Magnetic (ZM) or Potential (P) electromagnetic potential oscillations.Публікація On the locality principle keeping in Aharonov-Bohm effect(Вебер, 2013) Gritsunov, A. V.; Masolova, N.The locality principle fulfillment in the Aharonov-Bohm (AB) effect is analyzed from the point of view of a selfsufficient potential formalism based on so-called gradient hypothesis in electrodynamics. The “magnetic” kind of AB effect is examined (as the quantum charged particle moves to an infinitely long solenoid with a constant current), and no locality principle violation recognized if the gradient hypothesis is used. A conclusion is made that AB effect is no longer a physical or electrodynamic “paradox”.Публікація On the Problem of Ambiguity of Electromagnetic Potential(2013) Gritsunov, A. V.In the self-sufficient potential formalism, treating all electromagnetic phenomena as natural or forced oscillations of some distributed electromagnetic oscillating system (Minkowski space-time), the electromagnetic potential must be considered as some relative measure describing deviation of the system from its "undisturbed" state (when both natural and forced oscillations are absent). Therefore, there is no ambiguity in the gauge of one: all components of the potential four-vector are asymptotically verging towards zero while the distance from all free charges and currents enlarges. Such interpretation turns the electromagnetic potential into a physically real value.Публікація On the Reality of “Zero Magnetic” Oscillations of Potential(2012) Gritsunov, A. V.The existence of natural Zero Magnetic (ZM) oscillations of the distributed electromagnetic oscillating system (Minkowski space-time) is one of logical consequences of the self-sufficient potential formalism in electromagnetic theory. A mental experiment confirming the reality of the ZM waves of electromagnetic potential is proposed. Main characteristics of those waves are considered. A problem of possibility of application of the ZM waves to information transmission between spatially distributed objects (i.e., radio communication) is formulated.Публікація Propagation of Short Radio Pulses through Delay Line of a Cold TWT(2006) Gritsunov, A. V.; Skachkova, N. V.A technique for the simulation of wideband non-stationary electromagnetic fields excited in a regular dispersive delay line by an electron beam is proposed. This is based on a generalized wave equation numerical solving. A particular case of the technique use is shown by the simulation of short radio pulse advance in the delay line of the Northrop-Grumman “cold” traveling wave tube.Публікація Spectral models of klystrons and travelling-wave tubes(2010) Gritsunov, A. V.An attempt is made to expand the spectral approach, implemented only for the M-type devices yet, onto O-type devices such as one-beam klystrons and travelling-wave tubes. The general features of the new spectral models are described. The used algorithms of simulation are quoted.Публікація The Advanced Designs of Magnetrons with Improvement Output Characteristics(2016) Churyumov, G. I.; Gerasimov, V.; Frolova, T. I.; Gritsunov, A. V.; Ekezli, A.This paper presents the experimental and theoretical investigations of the two constructions of the magnetrons: the low-voltage X and Ku ranges magnetrons with two RF outputs of energy and the cold secondary emission cathode magnetron with ancillary side cold cathode. It is shown that the electronic frequency tuning in the magnetrons with two RF output can be obtained in the range more than 200 MHz. The electronic control of the frequency tuning from pulse to pulse is performed by the microwave switch on basis the p-i-n diodes. By using the computer modeling, the features of secondary emission multiplication mechanism of the electron beam at the front and droop of anode voltage pulses are shown. The prospects for developing such magnetrons and expansion of areas of their application are discussed.Публікація The Quantum Dynamics of Natural Distributed Oscillatory Systems(2016) Gritsunov, A. V.A statistical method for the quantization of natural electromagnetic (NEMOS) and electron-positron (NEPOS) oscillatory systems is discussed. The Wheeler-Feynman’s concept of “direct interparticle action” for the quantum radiation-absorption is generalized to the Coulomb interaction. The energy-momentum conservation is postulated as a fundamental law forbidding any objective their “uncertainty”. The spatial (spatio-temporal) localization of NEPOS wavepackets and the Heisenberg’s “uncertainty principle” are supposed to be a result of a permanent interaction of NEPOS and NEMOS, i.e., the stochastic exchange with random quanta of momentum (or energy-momentum) between ones. The absence of “zero-point oscillations” of the natural oscillatory systems is asserted. The new physical sense of De Broglie wavefunctions is illustrated with the simplest quantum systems “electrons in potential wells”.Публікація The Second Quantization of Natural Electromagnetic and Electron-Positron Oscillatory Systems(2016) Gritsunov, A. V.A statistical second quantization method for natural electromagnetic (NEMOS) and electron-positron (NEPOS) oscillatory systems is described. The spatial (spatio-temporal) localization of NEPOS and NEMOS wavepackets is supposed to be a result of their permanent interaction, i.e., the exchange with random momentum (energy-momentum) quanta between those systems. The absence of “zero-point oscillations” of natural distributed oscillatory systems is asserted.Публікація Why Aharonov-Bohm Effect Does Not Violate Locality Principle(2013) Gritsunov, A. V.Two hypotheses concerning the Lagrange function postulating for a system with electromagnetic interactions: "vortex" (classic) and "gradient" (new) are compared. It is shown that the gradient hypothesis, unlike the vortex one, does not result in conflict between the Aharonov-Bohm (AB) effect and the locality principle. A modification of AB effect in Zero Magnetic (ZM) oscillation of potential around excited closed waveguide is predicted.