SUPERCONFORMAL-LIKE TWISTING PARITY MORPHISMS, DEFORMATIONS AND ODD COCYCLES

S.A. Duplij

Abstract
On (1|1) semisupermanifolds analogs of superconformal morphisms - twisting parity of tangent space (TPt) tranformations - are introduced. Their contribution is took into account in deriving of mixed cocycle conditions for odd cocycles which could be treated as odd superanalog of Jacobian and TPt deformations and odd analogs of obstructions.

KEY WORDS: superconformal tгansformation, cocycle, deformation, obstruction.

SYMMETRY NATURE OF SOLITON SOLUTIONS IN THE FIELD MODELS

V.F. Klepikov, V.V. Litvinenko, V.A. Cherkaskiy

Abstract
A new method of building the exact soliton solutions in the field models of nonlinear medium, based on the group analysis of differential equations is presented. The models described by the differential equations of arbitrary order (including noninteger) in d - dimentional spaces (with arbitrary real d) are investigated. The role of symmetries in the other than solitons essentially nonlinear effects - wave collapses - is discussed.

KEY WORDS: Symmetry, soliton, conformal group, wave collapse, variation.

THE EMERGING ENERGY AND d-ELECTRONS FROM THIN SLABS EXPOSED TO ELECTRONS BEAM

F. Alouani-Bibi, V.T. Lazurik, Yu.V. Rogov

Abstract
A detailed study of the dependence of the energy taken out of slabs by knock-on electrons on the energy of incident electrons and their angle of incidence, slabs material and thickness has been made. This study is made basing on a detailed data set obtained by using Monte Carlo computations. The considered slabs are made of material with atomic number from 4 to 79 and thickness from 0.5 to 50 mg/cm². These slabs are irradiated by monoenergetic electrons beam with energy from 1 to 10 MeV. Semi empirical models that describe the energy taken out and the charge-deposition are developed.

KEY WORDS: translation method, charge-deposition, emerging energy.

THERMOACOUSTIC MECHANISM OF ACTION OF PULSED ELECTRON BEAM ON BIOLOGICAL OBJECTS

V.V. Tovstiak

Abstract
Excitation of ultrasonic vibrations in biological object by pulsed beam of relativistic electrons is theoretically investigated. It was shown that, for typical electron linac parameters, low-frequency component of acoustic pulse can be described in framework of thermoacoustic model of elastic wave excitation. This model relates average acoustic amplitude with average absorbed dose. The expression for thermoacoustic stress amplitude excited by pulsed electron beam was derived and analyzed. Both power and energetic criteria of essentiality of average radiation-acoustic action on biological object are proposed.

KEY WORDS: electron linear accelerator, pulsed irradiation, deposited dose, thermoacoustic stress, biological object, biological action of radiation.

ACOUSTIC EFFECT OF SECONDARY ELECTRONS AND MODIFIED PRINCIPLE OF HIT IN RADIOBIOLOGY

V.V. Tovstiak

Abstract
In framework of classic theory of target a modified principle of hit is investigated in the case when target inactivation is conditioned by thermoacoustic action of secondary electrons generated in biological object by ionizing particles. It was shown that biological action of ionizing radiation due to thermoacoustic effect of secondary electrons depends on target form and on relation between target dimension and radius of biological action zone. In supposition of "single hit" approximation, an analytic dependence between number of unaffected targets and irradiation dose was derived with accounting of the target modification. Influence of temperature on dependence "dose-effect" is discussed.

KEY WORDS: ionizing radiation, secondary electron, absorbed dose, microburn, thermoacoustic stress, biological object, inactivation, theory of target, principle of hit.

EXCITATION OF ACOUSTIC OSCILLATIONS BY DESTRUCTIVE ELECTRON IMPACT ON POLYCRYSTALLINE METAL TARGETS

V.A. Deryuga, A.I. Kalinichenko, G.F. Popov, A.G. Ponomarev, V.V. Uvarov

Abstract
The acoustic emission caused by high-current single-pulse electron beam in rod and disk polycrystalline metallic specimens was explored. The acoustic stress amplitude and the ejected mass were measured for various target materials, and beam configurations. The solid and tubular beams were used. For the first time, it was found that the acoustic amplitude increases with decreasing of crystalline grains in the beam-target interaction zone. The crystalline grain decrease derived from the high-rate unprompted cooling and quenching of material after its radiation heating. The first electron pulse yielded the main structure rebuilding whereas the following ones affected the modified material. The ratio of the stress amplitude from the second electron pulse to the amplitude from the first one varied from 2.6 (Nb) to 1.4 (Al). The history of acoustic amplitude for hard refractory metals (Ti, Nb) had typical substructure developed on the tail. A new effect was revealed consisting in amplification of acoustic pulse passing across zone of beam-matter interaction immediately after impact. These effects are probably conditioned by forced relaxation of residual thermoelastic stress under action of propagating acoustic pulse. The focusing of the stress wave towards beam axis was observed in the case of the tubular beam and plate targets.

KEY WORDS: high-current electron beam, acoustic emission, metal target, crystalline grain, ejected mass, residual thermoelastic stress.

NONLINEAR SECOND SOUND WAVES IN SOLIDS

V.D. Khodusov

Abstract
The equations describing nonlinear waves of the second sound in solids are received. They are reduced to the equation of simple waves in non-dissipative phonon hydrodynamics. In view of dissipations these waves are described by the Burgers equation.

KEY WORDS: phonon, second sound, nonlinearity, Burgers equation.

PHONON SPECTRUM PECULIARITIES IN METALLOOXIDE HIGH-T_c SUPERCONDUCTORS

I.N. Kudryavtsev

Abstract
A characteristic phonon spectrum and dispersion laws are determined for the acoustic and optic oscillations in metallooxide high-temperature superconductors (HTSC). The Van-Hove singularity points are studied. Phonon phase and group velocities are calculated. It is shown, that the optic phonons possess the anomalous dispersion. The effective masses of the phonons considered are calculated for various frequencies of spectrum. Theoretical analysis of the spectral phonon density of states for HTSC as a function of characteristic lattice basis dimension is carried out.

KEY WORDS: metallooxide HTSC, phonon spectrum, Van-Hove singularity, phonon dispersion, phase and group velocities, effective mass, spectral density of states, basis dimension.

ACOUSTIC SPECTRUM OF SOME SATURATED HYDROCARBONS WITH BRANCHED CHAIN

A.A. Asheko, V.S. Sperkach, A.K. Strel’tsina

Abstract
A absorption and velocity of sound in branched hydrocarbons: 3,3-dimethilpentan; 3-methilhexan, 3-methilheptan; 2,2,4- trimethilpentan; 2,3,4-trimethilpentan and 2-methiloctan are investigated in the frequency range 10…2500 MHz, at the temperatures from melting point up to 353 К. The acoustic relaxation in studied frequency range is found in all considered substances.

KEY WORDS: acoustic spectroscopy, acoustic absorption, sound propagation velocity, relaxation, hydrocarbon.

SPATIAL MAGNETIC POTENTIAL WALL AND MAGLEV IN THE SYSTEM OF MAGNETIC DIPOLE AND SUPERCONDUCTIVE SPHERE

S.S. Zub

Abstract
A second boundary problem for scalar magnetic potential of dipole in spheral area is decided, and we succeded to get the decision using elementary functions. We determine a magnetic field inside the area and magnetic potential interaction energy of dipole with inner surface of superconductive sphere (superconductor of the first kind). Analysis of the system on the dipole equilibrium stability shows, that there is a spatial static stable equilibrium in the sphere centre (we mean the so called "spatial MPW"). It is shown, that in presence of homogeneous external gravitational field a system visualizes MagLev.

KEY WORDS: stability, mathematical model, Neumann problem , superconductivity, MPW.

INVESTIGATION OF GIANT BARKHAUSEN JUMPS IN FERROMAGNETICS WITH MAGNETIC SEPARATION

A.I. Velikodniy, V.G. Kirichenko

Abstract
The experimental investigation of giant Barkhausen jumps in polycrystalline ferromagnetics 75Co-22Fe-3Nb and composite wire with magnetic separation is developed. The magnetic and electric parameters of impulse elements on the base of this materials and their temperature and pressure dependences are expound.

KEY WORDS: Barkhausen jumps, Vygand effect, magnetic separation, magnetic pulse elements.

DIOCOTRON INSTABILITY DAMPING BY DRIFT VELOCITY MODULATION

A.A. Bizyukov, Vl.V. Bobkov, A.Y. Kashaba, N.D. Sereda, I.K. Tarasov

Abstract
In this paper the influence of spatial modulation of electron drift velocity in EH-layer on the development of drift instability is studied. It is shown that the modulation of magnitude of electric field towards the drift with small amplitude leads to instability damping and decrease of anomalous electron transfer across magnetic field.

KEY WORDS: drift electron layer, drift instability, synchronization zone, diocotron oscillations.

PLASMACHEMICAL PROCESSES IN THE SYSTEM TECHNOLOGY OF LARGE-SCALE INTEGRATED CIRCUITS

S. Novosiadly

Abstract
In virtue of investigations new low temperature processes of forming of dielectric layers, profiled etching of contact windows, modification of photoresist surface and etching of metal and polysilicon layers in the system technology of high level have been elaborated.

KEY WORDS: anisotropic etching, profiling of windows, modification of surface, conformity of deposition.

STIMULATED PROCESSES IN SEMICONDUCTORS AND LAYERED STRUCTURES ON THEIR BASIS WITH INTERACTION WITH PLASMA FLUXES

N.M. Pelykhaty

Abstract
lt has been shown that with the bombardment of layered structures applied in integral schemes a masstransfer occurs between the metal film and a semiconductor. The processes of gas release of introduced argon and discontinuities of melal films, radiation stimulated diffusion have been observed. Calculation of formulas for the secondary atom distribution introduced into the semiconductor and formulas which can be used in elion technology have been presented.

KEY WORDS: distribution profile, thermal peak, radiation stimulated diffusion.

THE ION IMPLANTATION PLANT BEAM MONITOR

M.Ju. Silkin, S.N. Stervoyedov, N.G. Stervoyedov

Abstract
Elaborated software and hardware of the controlling system of the ion implantation into a semiconductor material plant is described. The controlling system is created on the basis of a multi-channel analog-to-digital processor of preliminary information processing from the plant sensors and results processing and monitoring IBM-computer. The system carries measuring of a vacuum conditions, ion source power parameters, ions beam and controls work of cooling circuits, executive and blocking devices.

KEY WORDS: ion implantation, controlling system, microprocessor, Faraday cup, implantation dose, analog-to-digital converter.