Institute for Radiophysics and Electronics of NAS of Ukraine

Kharkiv, Ukraine

Institute for Radiophysics and Electronics of NAS of Ukraine

Kharkiv, Ukraine

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Ilyenko K.,Institute for Radiophysics and Electronics of NAS of Ukraine | Kurkin S.A.,Chernyshevsky Saratov State University | Hramov A.E.,Saratov State Technical University | Opanasenko A.,National Science Center Kharkov Institute of Physics and Technology
CriMiCo 2013 - 2013 23rd International Crimean Conference Microwave and Telecommunication Technology, Conference Proceedings | Year: 2013

We obtained representations for static electric and magnetic fields induced by charged-particle current in a regular simply connected ideally conducting waveguide in the form of solutions to excitation equations of Kisunko-Vainshtein waveguide excitation theory. On the example of a regular rectangular waveguide an equivalence of the obtained expressions with Green's function representations of these fields is demonstrated. © 2013 CriMiCo'2013 Organising Committee, CrSTC.


Ilyenko K.,Institute for Radiophysics and Electronics of NAS of Ukraine | Yatsenko T.,Institute for Radiophysics and Electronics of NAS of Ukraine | Koronovskii A.A.,Saratov State Technical University | Kurkin S.A.,Chernyshevsky Saratov State University
Problems of Atomic Science and Technology | Year: 2014

For the initial radii of charged-particle beam in a coaxial magnetic undulator with partially shielded cathode we formulate the equilibrium equations, which enforce the defocusing self-electric field compensation by the longitudinal and azimuthal components of self-magnetic field of the electron beam and account for the undulator focusing through the first (leading) harmonic of the undulator magnetic field. Numerical solutions of the equilibrium equations in a coaxial magnetic undulator with shielded and non-shielded cathode are analyzed and compared.


Maltsev V.P.,Institute for Radiophysics and Electronics of NAS of Ukraine
YSF 2015 - International Young Scientists Forum on Applied Physics | Year: 2015

At the end it is possible to make the following conclusions: 1. The noncontact sensor on the base of coherent radar in CW mode and contact sensor which uses hall effect are developed for measurement of agriculture vehicle slip coefficient. 2. Use of such sensors provides optimal choice of the vehicle speed to minimize fuel consumption by control of the slip coefficient (difference between output data of the contact and noncontact sensors). 3. The design of both sensors is described and the algorithm of signal processing in the time-frequency domain is discussed. 4. For signal processing the special unit is developed on the base of microprocessor that realizes the algorithm described. 5. The preliminary experimental data are cited and the results of full scale tests are shown that confirmed the functioning of the sensors developed. © 2015 IEEE.


Fedorin I.V.,Kharkiv Polytechnic Institute | Baibak V.V.,Institute for Radiophysics and Electronics of NAS of Ukraine | Bulgakov A.A.,Institute for Radiophysics and Electronics of NAS of Ukraine
CriMiCo 2013 - 2013 23rd International Crimean Conference Microwave and Telecommunication Technology, Conference Proceedings | Year: 2013

The properties of terahertz surface waves (SW's) in the finite semiconductor-dielectric periodic structure in an external magnetic field were investigated. The band structure of the considered periodic material was analyzed (Fig. 1). Analytical and numerical calculations of the dispersion relation for SW's were carried out. The distribution of electromagnetic field and the energy flow of SW's were studied. We also analyzed the properties of SW's in the considered structure in the subwavelength approximation (effective medium approximation). © 2013 CriMiCo'2013 Organising Committee, CrSTC.


Yatsenko T.,Institute for Radiophysics and Electronics of NAS of Ukraine | Ilyenko K.,Institute for Radiophysics and Electronics of NAS of Ukraine | Sotnikov G.V.,National Science Center Kharkov Institute of Physics and Technology
Physics of Plasmas | Year: 2012

In the strong axial magnetic field approximation, we calculate the space-charge limited (SCL) current of axisymmetric relativistic charged-particle beam in a coaxial drift tube of finite length. Results are compared to analytical estimates and numerical modeling of SCL current in the infinitely long drift tube. For the infinitely long drift tube, which inner conductor is biased and the outer conductor is lined with a finite-width dielectric insert, analytic approximations for the SCL current in the bias voltage are developed. © 2012 American Institute of Physics.


Tishchenko A.S.,Institute for Radiophysics and Electronics of NAS of Ukraine | Yatsenko T.,Institute for Radiophysics and Electronics of NAS of Ukraine | Ilyenko K.,University of New Mexico
Problems of Atomic Science and Technology | Year: 2015

We derive the system of transcendental equations, which gives the equilibrium radii of charged-particle beam and the equilibrium value of square azimuthal momentum of beam boundary in a coaxial magnetic undulator with partially shielded cathode in guide homogeneous magnetic field. We formulate the dynamics equations, which de-scribe the transportation of charged-particle beam. We receive an analytical estimate of the azimuthal and longitudi-nal momentum of beam boundary. We study the equilibrium and differential equation numerically, compare results received for a coaxial magnetic undulator with shielded and non-shielded cathode and different induction of guide magnetic field. © 2015, National Science Center, Kharkov Institute of Physics and Technology. All rights reserved.


Fedorin I.,Kharkiv Polytechnic Institute | Bulgakov A.,Institute for Radiophysics and Electronics of NAS of Ukraine
International Conference on Mathematical Methods in Electromagnetic Theory, MMET | Year: 2012

Conical refraction phenomenon in a fine-stratified structure was studied. The structure was fabricated by periodic alternating dielectric and semiconductor layers and was exposed into an external magnetic field parallel to the boundaries of the layers and perpendicular to the plane of incidence. The expressions for effective permittivity were obtained. It has been shown that such structure represents a biaxial crystal. The dependences of aperture angles of an external and internal conical refraction cone as function of frequency, external magnetic field and thickness of layers were analysed. © 2012 IEEE.


Goryashko V.A.,Institute for Radiophysics and Electronics of NAS of Ukraine
Physical Review Special Topics - Accelerators and Beams | Year: 2011

Using a time-dependent approach, the analysis and optimization of a planar free-electron laser (FEL) amplifier with an axial magnetic field and an irregular waveguide is performed. By applying methods of nonlinear dynamics, a self-consistent reduced model of the FEL is built in a special phase space. This reduced model is the generalization of the Colson-Bonifacio model and takes into account the intricate dynamics of electrons in the pump magnetic field and the intramode scattering in the irregular waveguide. The reduced model and concepts of evolutionary computation are used to find optimal waveguide profiles. The numerical simulation of the original nonsimplified model is performed to check the effectiveness of found optimal profiles. To demonstrate advantages of the proposed FEL configuration, the parameters are chosen to be close to the parameters of the experiment, in which a sheet electron beam with the moderate thickness interacts with the TE01 mode of a rectangular waveguide. The results strongly indicate that one can improve the efficiency by a factor of 5 or 6 if the FEL operates in the magnetoresonance regime and if the irregular waveguide with the optimized profile is used. The FEL efficiency is maximal if the initial beam energy is slightly higher than the energy that corresponds to a transition between negative- and positive-mass regimes so that the transition from the negative-mass to positive-mass regimes occurs during the beam-wave interaction. © 2011 American Physical Society.


Noskov V.Ya.,Ural Federal University | Ermak G.P.,Institute for Radiophysics and Electronics of NAS of Ukraine | Vasyliev A.,Institute for Radiophysics and Electronics of NAS of Ukraine
2014 20th International Conference on Microwaves, Radar and Wireless Communications, MIKON 2014 | Year: 2014

Research results on signal and noise characteristics of autodyne microwave vibration sensors are discussed for external feedback weak and strong. Also, questions are considered about selection of working points and ways of autodyne signal identification. © 2014 Warsaw University of Technology (WUT).


Yatsenko T.Yu.,Institute for Radiophysics and Electronics of NAS of Ukraine | Sotnikov G.V.,National Science Center Kharkov Institute of Physics and Technology | Ilyenko K.,Institute for Radiophysics and Electronics of NAS of Ukraine
CriMiCo 2011 - 2011 21st International Crimean Conference: Microwave and Telecommunication Technology, Conference Proceedings | Year: 2011

The dependence of limiting currents of two concentric magnetically-confined annular charged-particle beams on non-zero bias voltage applied to the inner conductor of a coaxial drift tube is studied. We show that the control over the limiting currents on the level up to 15 per cent for electron beams can be achieved with the inner conductor bias voltage not greater than 50 kV. © 2011 CRIMICO (Crimean Microwave Conference).

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