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## 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.

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.

IVEC was originally created in 2000 by merging the U.S. Power Tubes Conferences and the European Space Agency TWTA Workshops. Now a fully international conference, IVEC is held every other year in the U.S., and in Europe and Asia alternately every fourth year. After the successful and enjoyable meeting in Paris, France in May, IVEC 2014 will return to its beautiful U.S. location in the city of Monterey.

The Seventeenth International Vacuum Electronics Conference (IVEC 2016) helded on 19-21 April 2016 in Monterey, California. With technical co-sponsorship from the IEEE Electron Devices Society (EDS), the conference provide a forum for scientists and engineers from around the globe to present the latest developments in vacuum electronics technology at frequencies ranging from the UHF to THz frequency bands.

IVEC was originally created in 2000 by merging the U.S. Power Tubes Conferences and the European Space Agency TWTA Workshops. Now a fully international conference, IVEC is held every other year in the U.S., and in Europe and Asia alternately every fourth year. After the successful and enjoyable meeting in Beijing, China in May, IVEC 2016 will return to its beautiful U.S. location in the city of Monterey.

With technical co-sponsorship from the IEEE Electron Devices Society (EDS), the conference will provide a forum for scientists and engineers from around the globe to present the latest developments in vacuum electronics technology at frequencies ranging from the UHF to THz frequency bands.

IVEC was originally created in 2000 by merging the U.S. Power Tubes Conferences and the European Space Agency TWTA Workshops. Now a fully international conference, IVEC is held every other year in USA, and in Europe and Asia alternately every fourth year. After the successful meeting in Paris, France in 2013 and Monterey, USA in 2012 and 2014,IVEC 2015 will return to Asia to the wonderful city of Beijing.

Generalized error-locating codes are discussed. An algorithm for calculation of the upper bound of the probability of erroneous decoding for known code parameters and the input error probability is given. Based on this algorithm, an algorithm for selection of the code parameters for a specified design and input and output error probabilities is constructed. The lower bound of the probability of erroneous decoding is given. Examples of the dependence of the probability of erroneous decoding on the input error probability are given and the behavior of the obtained curves is explained.

This volume presents new results in the study and optimization of information transmission models in telecommunication networks using different approaches, mainly based on theiries of queueing systems and queueing networks .

The paper provides a number of proposed draft operational guidelines for technology measurement and includes a number of tentative technology definitions to be used for statistical purposes, principles for identification and classification of potentially growing technology areas, suggestions on the survey strategies and indicators. These are the key components of an internationally harmonized framework for collecting and interpreting technology data that would need to be further developed through a broader consultation process. A summary of definitions of technology already available in OECD manuals and the stocktaking results are provided in the Annex section.