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Self-Organization in Plasma

#2922


Self-Organization of Spatial Structures in Glow Discharge Plasma

Tech Area / Field

  • PHY-PLS/Plasma Physics/Physics

Status
3 Approved without Funding

Registration date
12.11.2003

Leading Institute
Institute of Thermophysics, Russia, Novosibirsk reg., Novosibirsk

Supporting institutes

  • VNIIEF, Russia, N. Novgorod reg., Sarov

Collaborators

  • University of Illinois / Department of Electrical and Computer Engineering, USA, IL, Urbana

Project summary

The aim of the project is a comprehensive investigation of the physical mechanisms of forming plasma structures (strata) in the plasma of a glowing discharge at different topologies or geometries of a discharge gap. The research is planned to be carried out for flat, cylindrical, and spherical geometries as well as for other topological forms. The glowing discharge is broadly used in the scientific research of plasma-chemical reactions, in the study of numerous plasma instabilities and is widely applied in laser and plasma sources of light, for the deposition of thin films, cleaning the surfaces, and processing materials.

The study of forming strata in the plasma of a gas discharge is an important issue in several respects. Understanding the mechanisms of strata self-organization in the plasma of a glowing discharge will make it possible to exercise control over the process of forming plasma structures. One of the brightest examples of this phenomenon is the stratification of a gas discharge. This phenomenon can be applied both in scientific research and in practice. Thus, at the strata boundaries, where strong electric fields, are formed and when the effects of non-locality play a significant role, it is possible to study plasma-chemical reactions and the kinetics of electron distribution function formation. In spite of considerable progress in the study of the nature of plasma non-localities, there has not been reached a full understanding of the mechanisms of strata self-organization in the plasma of gas discharge even in the simple geometry of a discharge gap. This is accounted for by the complexity of the problem of the study of strata formation in plasma, which embraces a number of problems connected with the self-organization of structures in open systems, with the physical character of a gas discharge, and the kinetics of plasma-chemical processes.

Within the framework of the project, it is planned to carry out experimental and theoretical research of spatial structures self-organization at different topologies or geometries of a discharge gap. With the purpose of establishing the general principles of structures self-organization and using this phenomenon in various applications, it is supposed to establish an interconnection between the conditions of strata formation in gases, the physical and chemical characteristics of which differ greatly (inertial gases, gas mixtures, high-molecular gases), within the different topology (or geometries) of a discharge area.

We intend to carry out theoretical and experimental research of self-organization of spatial strata in the plasma of a glow discharge. The theoretical research will include the estimations of discharge parameters using the kinetic theory and hybrid models making it possible to solve a self-consistent problem using the method of direct statistic modeling – the method of Monte-Carlo. In terms of experiment, we intend to carry out electric, optical, spectral, and probe measurements. We also plan to study the electron drift in gas media having different chemical compositions. Special attention will be paid to the study of the general principles of self-organization of structures and to determining the governing parameters, i.e. the criteria that determine the characteristics of the newly formed structures. On the basis of the experimental data, we plan to construct an adequate model describing the process of the formation of the structures in glow discharge plasma. As the main result of the project, there will be put forward proposals of optimizing the usage of strata characteristics in various applications.

Experimentalists on plasma physics (IT SB RAS), physicists-theoreticians (IT SB RAS and VNIIEF) and mathematicians (VNIIEF), who specialize in the theory and numerical modeling on dynamics of complicated processes in hot and low-temperature plasmas, are involved in the Project. Many of them have been noted for their research in this field, in particular, for works published on the subject of the Project. The papers of the Project scientific leader and manager professor G.I.Sukhinin on the kinetics of plasma-chemical processes and the theory of a spherical stratified discharge have won a wide recognition in Russia and abroad. The sub-manager and scientific leader in VNIIEF professor L.P. Babich is well-known for his works on physics of the non-local processes in plasma and obtained recognition of the world scientific community.


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