Main field of study: 010900 Applied Mathematics and Physics
Area of specialization: Electron-Ionic Processes in Liquids and Gases
Course director: Professor Yu. K. Stishkov
Department of Radiophysics
Scientific advisor: teaching assistant V. A. Chirkov
Reviewer: Professor Yu. K. Stishkov

Features of High-Voltage Conductivity of Dielectric Liquids
at the Injection and Dissociation Mechanisms of Charge Formation 
A. A. Sitnikov

The conductivity of liquid dielectrics increases under the action of a strong electric field due to emergence of both high-voltage charge formation (i.e., the injection and field-enhanced dissociation) and the convective mechanism of charge transport, i.e., electrohydrodynamic (EHD) flows. 
The present work aimed mainly  to develop an experimental technique, which would allow detecting the prevailing mechanism of charge formation (MCF) for specific electrode systems and liquids. To this end, a special experimental setup was built to obtain and to process the current and the voltage waveforms.
The conductivity values were obtained for a wide range of dielectric liquids and electrode materials. The features were experimentally revealed and confirmed, which had been revealed in the computer simulation, namely, the effect of MCF on the presence of the hysteresis at the dynamical current-voltage characteristic. 
The examples of domination of one of MCFs are shown.

The list of the publications
1.	V. A. Chirkov, Yu. K. Stishkov, A. A. Sitnikov, Features of current passage processes in liquid dielectrics at the injection and dissociation mechanisms of charge formation // Proceedings of International Symposium on Electrohydrodynamics, Okinawa, Japan, 2014
2.	V. A. Chirkov, Yu. K. Stishkov, A. A. Sitnikov, Integral electric current characteristics of unsteady-state processes of current passage through liquid dielectrics // Proceedings of 18th International Conference on Dielectric Liquids, Bled, Slovenia, 2014.
3.	V. A. Chirkov, Yu. K. Stishkov, A. A. Sitnikov, Dynamic Current–Voltage Characteristics of Weakly Conducting Liquids in Highly Non-Uniform Electric Fields // Surface Engineering and Applied Electrochemistry, Vol. 50, No. 2, pp. 135–140, 2014.
4.	Yu. K. Stishkov, V. A. Chirkov, A. A. Sitnikov, Dynamic current-voltage characteristics of weakly conducting liquids in highly non-uniform electric field // Proceedings of Xth International Conference on Modern Problems of Electrophysics and Electrohydrodynamics of Liquids, Russia, Sankt-Peterburg, pp. 164-167, 2012. 
5.	V. A. Chirkov, Yu. K. Stishkov, A. A. Sitnikov, A Technique for Rapid Measurement of High-Voltage Conductivity of Dielectric Liquids // Proceedings of the 19th International Symposium on High Voltage Engineering, 2015. (In press).