Proceedings of the 14th IEEE International Vacuum Electronics Conference (IVEC-2013)
IVEC 2013 is intended to be a forum of information and discussion between the various players in the field of vacuum electronics: device users, manufacturers and operators, government/institutions, academics, and students. Submissions from all groups are encouraged. IVEC 2013 will provide the right place for the exchange of scientific and technical information and will foster collaboration and cooperation in the vacuum electronics domain both at European and worldwide level.
We consider the possibility to replace an electron beam (EB) by a "hot" equivalent capacitance that will make it possible to use "hot" equivalent circuits and long lines for analysis the EB interaction in TWTs. A sheet EB in the field of the in-phase mode of the slow wave excited by coupled impedance electrodes is considered in this paper.
The model based on coupled impedance electrodes was used to analyze effectiveness of a sheet e-beam interaction with the in-phase mode of a slow wave. The coupling coefficient, characterizing the interaction effectiveness, was calculated using derivatives of the equivalent parameters, the specific capacitances and inductance. The calculated coefficient was compared with that of a cylindrical e-beam in a helix.
Abstract: With the help of the finite-difference equation of excitation of periodic waveguides obtained the characteristic equation of the electron waves formed by the interaction of an electron beam with the forward and backward electromagnetic waves periodic slow-wave systems (SWS). The resulting characteristic equation describes the electron-wave interaction in the passband and stopband of periodic SWS. Found a number of analytical solutions of the characteristic equation, which allowed to compare the properties of the amplification and propagation of electron waves inside and on the border of passband and stopband of periodic slow-wave systems.
The technique of resonance effects analysis in the quantum exchange interaction of the electron and positron flows is developed. At the framework of macroscopic quantum theory conducted a joint decision of the Schrödinger and Poisson equations for the macroscopic wave function of the electrons and positrons. Resonance effects in the quantum exchange interaction leads to selforganization of the active volume of a charged medium, and continue up to dynamic compensation of the Coulomb field and the establishment of an electron-positron mode. The calculation results of the potential distribution and the wave functions of the exchange interaction are present.
Currently developing new scientific direction - gamma electronics, which investigated the interaction of the electron and positron beams with the electromagnetic field in the γ-range wavelength. Gamma-electronics study tasks and problems of production and long existence the electron-positron substance (EPS) with unique properties. The ability to manage the use of the energy of electron-positron pairs to implement the EPS and the creation microwave amplifiers and oscillators on powerful multibeam flows of slow electrons and positrons is an important problem of relativistic electronics.
Self-organization of electron-positron substance is considered in the problems of gammaelectronics (γ electronics), in which investigates the interaction between the electron and positron flows with electromagnetic fields in γ-wavelength range. In devices of gamma-electronics and microwave electronics important role play collective processes that allow organizing an optimal grouping of charged particles and efficient braking clots.
Microwave radiation of two passing or counter electron beams promising for amplification and generation of microwaves in regime of electronic mode as well as for energy extraction using directional radiation. In the twobeam devices on the passing beams amplification determined by the longitudinal beams interaction with different speed. Usage of counter beams allows us to consider the generation of microwaves in the longitudinal interaction with internal feedback to the flow.
Possible quantum analogues of classical powerful microwave devices (multiwave Cherenkov generator, high-power klystrons, relativistic TWT and BWO) in the interaction of multi streams of charged particles of different sign are discussed. From the standpoint link with the experiment, we have the electronpositron system with collective interaction of many macroscopic groups of particles.