SCIENTIFIC AND ORGANIZATION STRUCTURE
THEORETICAL PHYSICS LABORATORY
The Theoretical Physics Laboratory was organized in 1980 aimed at theoretical investigations following the research areas of IHCE. Dr. V.G. Bagrov was the first head of the laboratory. Just from laboratory foundation it consisted from two investigational groups: a group involved in electrodynamics and electron beams physics leaded by V.G. Bagrov, and a group headed by Dr. E.A. Litvinov engaged in studies of processes taking place in cathode spot region. Since 1999 the laboratory carries out works under the direction of Dr. A.V. Kozyrev. A group of computing modeling leaded by Dr. V.V. Ryzhov belongs to Theoretical Physics Laboratory. Presently, 4 Doctors of Science and 2 Candidates of Science work at the Laboratory.
Theoretical investigations in the field of high-current electronics and charged particles interaction with matter:
- Explosive electron emission and e-beam physics;
- Theory of physical processes in gas and vacuum discharges;
- Theory of cascades of atomic collisions induced by ion and electron bombardment of solids;
- Computer simulation of the processes occurred at charged particles interaction with matter.
The main scientific achievements
- A theory of coaxial diode with magnetic insulation (CDMI) was developed. For the first time it was shown that the value of current of thin circular e-beam in CDMI is determined by e-beam acceleration area ("Fedosov current"). In the non-relativistic limit, this value can not exceed ~70% from the limit value of the beam current in circular transportation channel, and in ultrarelativistic case it asymptotically tends to limit value.
- Theory of initial stage of explosive electron emission was developed. It is shown that the basic parameters of microcraters on cathode surface as well as the number of other parameters of vacuum breakdown may be explained on the basis of model of material Joule heating and rapid (explosive) character of material evaporation resulting from local current passage through small-sized emission center.
- Spectrum deceleration theory of rapid ions in a charge-equilibration matter was proposed. Comparison with results of computer simulation demonstrates exceptionally high accuracy of analytical expressions obtained in a wide range of ion beam and target parameters. In 2001, Lev Glazov was awarded with Medal of the Russian Academy of Sciences for junior researchers in the field of general physics and astronomy for cycle of theoretical works "Study of kinetics of ion interaction with matter".
- A considerable contribution has been made to the theory of magnetic insulation of e-beam in cylindrical diode, i.e. condition of e-beam magnetic insulation in high-current diodes was summarized. Distinction for two cases of beam magnetic insulation was shown: magnetic field of e-beam own current and magnetic field of diode external current. On this basis, a theory of electron pinch stationary state in rod pinch diodes was evolved.
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