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Your search keyword '"Il'ichev, E."' showing total 13 results
Start Over Author "Il'ichev, E." Journal technical physics
13 results on '"Il'ichev, E."'

6. Design and investigation of UV image detectors

Author

Bespalov, V. A., Glazov, V. M., Il’ichev, E. A., Klimov, Yu. A., Kuklev, S. V., Kuleshov, A. E., Nabiev, R. M., Petrukhin, G. N., Potapov, B. G., Rychkov, G. S., Sokolov, D. S., Fandeev, V. V., Fetisov, E. A., and Yakushov, S. S.

Published
2015
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9. The thermal image receiver realized in the electron-optical converter architecture

Author

null Rychkov G. S., null Popov A. V., null Petruhin G. N., null Il'ichev E. A., null Zolotukhin P. A., and null Grevcev A. S.

Abstract

An innovative design is considered, and the results of analysis and calculations of the characteristics of a thermal image receiver (3-15 microns), made in the electron-optical converter architecture, are presented. For the sensor-converting pyroelectric unit of the electron-optical converter, the spatial dependences of the electric field strengths and the values of the electric potentials on the spontaneous polarization of the film substance are calculated. Estimates are obtained and the characteristics of thermal-field-induced polarization of various pyroelectric films are discussed. The temperature dependences of the polarization characteristics of a number of pyroelectric films are calculated using the finite element method in the COMSOL Multiphysics software package. Possible contributions of the piezoelectric effect to the picture of the distribution of electric potentials from the thermal polarization of pyroelectric films are taken into account. Estimates are obtained for the limiting values of the main instrument characteristics of the electron-optical converter. Keywords: the electron-optical converter, spontaneous polarization, pyroelectric, bolometric thermal imagers, pyroelectric thermal imagers.

Published
2022

10. An investigation of reading thermal images processes by a thermal image receiver made in the image intensifier tube architecture

Author

null Rychkov G. S., null Popov A. V., null Petrukhin G. N., null Il’ichev E. A., null Zolotukhin P. A., and null Grevcev A. S.

Abstract

The results of calculations of electric fields, potentials, and trajectories of photoelectrons calculations of single-channel dual-spectral thermal imager, implemented in the IIT architecture are presented. The values of the optimal potentials on the control electrodes (microchannel plate, reading electrode, and photocathode) that form a picture of the images of objects and ensure the correct reading of the potential relief from the surface of the sensor-converter pyroelectric film of the image thermal receiver under discussion are determined. Keywords: image intensifier tube, spontaneous polarization, a pyroelectric sensor, photocathode, photoelectronic emission, thermal object image receiver, secondary electron emission.

Published
2022

11. Calculation and optimization of the limiting characteristics of a single-channel dual-spectrum image receiver of objects emitting in the ultraviolet range

Author

null Teverovskaya E. G., null Rychkov G. S., null Popov A. V., null Petrukhin G. N., null Il'ichev E. A., and null Zolotukhin P. A.

Abstract

A single-channel, two-spectral image receiver of objects emitting in UV radiation, made in the image intensifier tube architecture, was proposed and investigated. With the help of the COMSOL Multiphysics software package, search optimal measurements of the potential on the elements of the image receiver (silicon membrane, germanium and diamond photocathode, MCP input and output sensors) were implemented, which provides the possibility of registering and presence of UV objects in relation to the terrain. Keywords: image intensifier tube, diamond photocathode, germanium photocathode, ultraviolet radiation, object imager, photoelectron emission, secondary electron emission.

Published
2022

12. Electrical instability against thermal injection in multibarrier heterostructures: Theoretical model and experimental data.

Author

Gergel', V., Altukhov, I., Verkhovtseva, A., Galiev, G., Gorshkova, N., Zelenyi, A., Il'ichev, E., Minkin, V., and Paprotskii, S.

Subjects
GALLIUM arsenide, HETEROSTRUCTURES, CURRENT-voltage characteristics, ELECTRON temperature, ELECTRIC measurements, THERMAL properties of metals
Abstract

A simplified theoretical description of electrical instability under thermal injection in multibarrier heterostructures is given in terms of internal positive feedback in each elementary unit of the hetero-object. In the simplest case, which is a sequence of equally high heterobarriers, a pair of neighboring wide- and narrow-gap layers is taken for an elementary unit. Analytical dependences of the current and voltage in the structure on the electron temperature at the injecting boundary of the heterobarrier and the respective bistable I- V characteristics are derived. A typical I- V characteristic with a clear-cut negative resistance region is demonstrated. It is taken in quasi-static electrical measurements made on 12-μm test multibarrier GaAs/AlGaAs mesas. [ABSTRACT FROM AUTHOR]

Published
2015
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13. Method for the formation of graphene films.

Author

Il'ichev, E., Kirilenko, E., Petrukhin, G., Rychkov, G., Sakharov, O., Khamdokhov, Z., Khamdokhov, E., Chernyavskaya, E., Shupegin, M., and Shchekin, A.

Subjects
*GRAPHENE, *THERMOPHORESIS, *CARBON films, *SILICON films, *NANOPARTICLES, *RING formation (Chemistry)
Abstract

A method is proposed to form graphene films using thermodiffusion of carbon atoms from an amorphous carbon or silicon-carbon film with a nanosized thickness through a catalyst film, their accumulation at the catalyst layer/barrier layer interface, and the subsequent carbon quasi-liquid-graphene phase transition. One of the advantages of this method of producing graphene films is the possibility of their formation directly on a dielectric layer and the subsequent suspension of a graphene film over the substrate surface using membrane technologies, which excludes the necessity of using complex procedures to separate a graphene film from the substrate. [ABSTRACT FROM AUTHOR]

Published
2014
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