The Journal of Kharkov National University, Vol. 794,
Physical series "NUCLEI, PARTICLES, FIELDS", Issue 1/37/, 2008
| I.I. Aksenov, D.S. Aksyonov, V.V. Vasilyev, A.A. Luchaninov, ņ.ő. Omarov, V.E. Strelínitskij
Formation of vacuum-arc plasma streams by sources with the wide aperture magnetic filter (Rus.)
| ņ.A. Valter, I.I.Zalyubovsky, V.E. Storizhko, N.P.Dikiy, A.N. Dovbnya
Progress in Ukraine in the new scientific field on the border of nuclear physics and earth sciences (Ukr.)
| Yu.A. Kasatkin, I.K. Kirichenko
Asymptotic the total cross section of deuteron photodisintegration in approach with the exactly conserved nuclear current (Rus.)
| V.G. Kirichenko, A.I. Kirdin, A.V. Ostapov
The influence of electronic structure of doping elements on the corrosion of zirconium alloys (Rus.)
| E.V. Belkin, V.M. Kuklin
The simulation of the development of the finite-amplitude wave modulation instability in the nonlinear medium (Rus.)
| A.P. Lypovskiy, A.V. Glamazdin, V.G. Gorbenko, R.I. Pomatsalyuk
Hall A (TJNAF) Moller polarimeter upgrade for PREX (Ukr.)
| V.S. Okovit, M.B. Lazareva, P.A. Khaimovich, L.A. Chirkina, A.S. Bulatov, V.V. Kalinovsky, V.I. Sokolenko, K.V. Kovtyn, R.V. Azhazha, V.F. Dolzhenko
Influence of Ůryogenic deformation at uniform compression on physical-mechanical properties of hafnium in temperature range of 77...800†K (Rus.)
| S.A. Pismenetskiy, V.B. Pyshkin, V.G. Rudychev, Y.V. Rudychev
Estimation of afterheat of VVER-1000 spent nuclear fuel (Rus.)
| A.S. Kachan, I.V. Kurguz, I.S. Kovtunenko, V.M. Mischenko, V.A. Panin
Resonance-like structure, observed in the 30Si(p,g)31P (Rus.)
| H.Yu. Bereza
Alloy metastable quasieutectic crystallization (Ukr.)
| V.A. Chishkala, D.L. Ryabchikov,Ye.V. Klochko, D.V. Kudin, N.M. Lototskiy
Heat conductivity of composition materials on the basis of hydride of aluminium and termal expanded graphite (Rus.)
| N.I. Ayzatskiy, A.N. Dovbnya, V.V. Zakutin, T.A. Kovalenko, N.G. Reshetnyak, V.P. Romasíko, I.ņ. Chertishcev
Forming of electron current bunches in magnetron gun with secondary emission cathode (Rus.)
| N.A. Dovbnya, G.D. Pugachov, I.I. Shapoval
High luminosity photon beams production on electron accelerators (Ukr.)
| A.V. Prokopenko, A.I. Skibenko, I.B. Pinos
Determination of the extraordinary wave reflection layer position in inhomogeneous plasma placed in radially changing magnetic field (Rus.)
| Ye.L. Sorokovoy, V.V. Chechkin, L.I. Grigoríeva, E.L. Sorokovoy, A.A. Beletskii, A.S. Slavnyj, Yu.S. Lavrenovich, Ye.D. Volkov, P.Ya. Burchenko, S.A. Tsybenko, A.V. Lozin, A.Ye. Kulaga, D.V. Kurilo, Yu.K. Mironov, V.S. Romanov
Effects of h-mode transition on plasma flow characteristics in the helical divertor of the URAGAN-3M torsatron (Eng.)
| I.V. Drebot, Y.N. Grigoryev, A.Y. Zelinsky
Dynamics of electron in the field of a linear polarized standing electromagnetic waves (Rus.)
| V.A. Seroshtanov, S.V. Shariy, V.B. Yuferov, O.S. Druy, V.V. Yegorenkov, E.V. Rybas
The double-stage plasma source with vacuum arc discharge for separator (Rus.)
| Yu.V. Kovtun, E.I. Skibenko, V.B. Yuferov
Systems with self-excitation of rf oscilations for formation, heating and separation of multicomponent plasma (Rus.)
| S.V. Shariy, V.A. Seroshtanov, V.B. Yuferov, O.S. Druy, V.V. Yegorenkov, E.V. Rybas
Stationar gas plasma source of heavy ions with closed electron drift (Rus.)
| N.V. Bondarenko
Formation of shadow in hadron diffraction scattering by the mechanism of gluon bremsstrahlung at fragmentation (Rus.)
| A.O.†Mytsykov, O.D.†Zvonaryova, O.V. Ryezayev, A.M. Gvozdí
Influence of manufacture errors on a magnetic field of quadrupole lenses (Rus.)
FORMATION OF VACUUM-ARC PLASMA STREAMS BY SOURCES WITH THE WIDE APERTURE MAGNETIC FILTER
I.I. Aksenov, D.S. Aksyonov, V.V. Vasilyev, A.A. Luchaninov, ņ.ő. Omarov, V.E. Strelínitskij
Full Text : (5720 kB, Rus.)
Behavior of erosive plasma of a cathodic vacuum arc in the magnetic filter with curvilinear wide aperture plasma duct is considered. It is experimentally established, that the increase in
cross-sectional dimension of the plasma duct (up to 200 - 300 mm) at small ratio of the radius of curvature to the inner radius of the plasma guiding channel (aspect ratio) promotes
substantial growth of the system throughput. The main losses of plasma at its transportation along the plasma guiding channel of the filter fall to its curvilinear section. Losses here are
caused by diffusion of plasma across magnetic field and also its centrifugal and gradient drift. It is established, that the drifts losses can be noticeably lowered by local correction of the
magnetic field by angular displacement of the coil in the curvilinear part of the plasma duct. It is revealed, that appreciable decrease of losses can be reached supplying negative potential
to the certain sections of the plasma duct walls at positive bias potential of the plasma duct as a whole. Prototypes of the plasma sources, at which development the results of the given
researches were used, are presented.
KEY WORDS: erosive plasma, magnetic filter, drift losses, ion current, bias potential, throughput.
PROGRESS IN UKRAINE IN THE NEW SCIENTIFIC FIELD ON THE BORDER OF NUCLEAR PHYSICS AND EARTH SCIENCES
ņ.A. Valter, I.I.Zalyubovsky, V.E. Storizhko, N.P.Dikiy, A.N. Dovbnya
Full Text : (1320 kB, Ukr.)
The ūrogress in new scientific field were consist of achievements: combining microanalytical, mineralogical, crystallochemical and geochemical approaches, this paper analyzes a possibility of
natural occurrence of enriched or even pure and super pure rare isotopes that can be extracted from ores. Methods of and results from the investigations of these isotope anomalies are
presented; ancient uranium ores from the Ukrainian Shield were found to have appreciable deviations from radioactive equilibrium. An oversight of this fact may negatively affect the uranium
content data measured by radiometric methods. The extent of the deviation from radioactive equilibrium correlates with the mineral composition of the ores. A possible explanation is that the
minerals grain permeability to fluids facilitating the removal of intermediate decay products, depends on the particular atomic structure and defects in real crystals; some examples of the
mineralogical approach to determination of the most promising geological sours of the nuclear energy raw materials from Ukraine were done.
KEY WORDS: Radioactive disintegration, pure isotopes, radioactive nonequilirium, uranium ores, nuclear spectroscopy, nuclear power.
THE INFLUENCE OF ELECTRONIC STRUCTURE OF DOPING ELEMENTS ON THE CORROSION OF ZIRCONIUM ALLOYS
V.G. Kirichenko, A.I. Kirdin, A.V. Ostapov
Full Text : (1500 kB, Rus.)
Investigations results of contained iron zirconium alloys surface structure and phase composition after thermal and mechanical treatment and corrosion in the high parameters water are
presented. It is shown the thermal and mechanical treatment with final isochronous ageing in temperature range from 570 to 1070 leads to concentration growth of intermetallic phases in
surface layers up to 0.3 μm depth. Concentration growth depends upon alloy composition. For example, Nb concentration increase from 0,5% to 2,5% in Zr+0.31%Fe+0.5%Nb alloy leads to
twice decrease of intermetallic phases concentration in surface layer. Zirconium alloys corrosion in high parameters water leads to formation of heterogeneous phase oxide films which
contained iron in oxide amorphous phases and in intermetallic phases. Effect of admixture electron structure appears as some dependences correlation such as admixtures atomic size,
interstitial admixtures density of Fermi energy levels, 57Fe nuclei s-electron density with Miedema's electronegativity.
KEY WORDS: zirconium, alloying, surface, segregation, electron structure, corrosion.
HALL A (TJNAF) MOLLER POLARIMETER UPGRADE FOR PREX
A.P. Lypovskiy, A.V. Glamazdin, V.G. Gorbenko, R.I. Pomatsalyuk
Full Text : (740 kB, Rus.)
Some aspects of the Hall A moller polarimeter reconstruction of the Moller Polarimeter at Jefferson Laboratory were observed. The physic basis of a measuring method of the neutron form
factor of 208Pb nucleous from electro-weak asymmetry investigation at the elastic scattering of polarized electrons is presented. The experimental possibillities of the presize measurements of a
electron beam polarization value by using Hall A equipment and some details of the equipment upgrade and experimental procedure improvement are shown. The calculation results of the
magnet optic system parameters at the critical low primary electron beam energy 850 MeV, of the thermodynamic processes of the intense electron beam at 50 microamper interraction with the
target material, of the influence of a strong magnetic field at 40000 Oersted presence on Moller electron trajectories are presented. The original construction of a target device with the "brute
force" ferromagnetic foils magnetization is shortly written.
KEY WORDS: moller polarimeter, modernization, nucleous neutron form factor, parity violating, electro-weak asymmetry, elastic scattering, polarized electrons.
INFLUENCE OF —RYOGENIC DEFORMATION AT UNIFORM COMPRESSION ON PHYSICAL-MECHANICAL PROPERTIES OF HAFNIUM IN TEMPERATURE RANGE OF 77...800†K
V.S. Okovit, M.B. Lazareva, P.A. Khaimovich, L.A. Chirkina, A.S. Bulatov, V.V. Kalinovsky, V.I. Sokolenko, K.V. Kovtyn, R.V. Azhazha, V.F. Dolzhenko
Full Text : (350 kB, Rus.)
The mechanical properties and structural parameters of hafnium GFE-1 in the initial state and after quasihydroextrusion with a counterpressure (QHEC) at 77 on 25 % were researched.
It has been found that after QHEC isotropic deformation structure is formed, the shear modulus decreased, strength characterisic and resistivity in temperature range 77Ö800 K are
increased , the deformation work-hardening is repressed. Both for the initial state and after QHEC does hafnium have falling of plasticity at “=600 K. Consider possible mechanisms of
influence of conditions of deformation and redistribution of admixtures of introduction on the change of energy of defect of packing of hafnium.
KEY WORDS: hafnium, quasihydroextrusion, mechanical properties, structure, deformation mechanisms.
RESONANCE-LIKE STRUCTURE, OBSERVED IN THE 30Si(p,g)31P REACTION
A.S. Kachan, I.V. Kurguz, I.S. Kovtunenko, V.M. Mischenko, V.A. Panin
Full Text : (250 kB, Rus.)
Gamma-decay of the resonance-like structures observed in the 30Si(p,g)31P reaction in the energy range Ep = 1,4-2,7 MeV of accelerated protons was studied. Excitation function, g-ray
spectra and angle distributions were measured for resonances at Ep = 1482, 2350, 2505 keV, which composed this resonance-like structure. The M1-resonance is identified on the ground
state and first excited state of 31P. The total strength and the center of gravity of the M1-resonance on the ground state is determined for given nucleus. The position and total strength of M1-
resonance on the ground state is explained by taking into account pairing forces.
KEY WORDS: The 30Si(p,g)31P reaction, M1 resonance, M1 transition, pairing-energy, giant resonance.
HEAT CONDUCTIVITY OF COMPOSITION MATERIALS ON THE BASIS OF HYDRIDE OF ALUMINIUM AND THERMAL EXPANDED GRAPHITE
V.A. Chishkala, D.L. Ryabchikov, Ye.V. Klochko, D.V. Kudin, N.M. Lototskiy
Full Text : (1060 kB, Rus.)
In the work experimental research of heat conductivity of composition materials on the basis of hydride of aluminium and thermal expanded graphite was carried out. It is shown, that composites with mass maintenance of graphite of to 30 the mass. % does possess acceptable heat conductivity properties, at saving of satisfactory mechanical descriptions and high hydrogen capacity
(7 the mass.% H). Estimation of effective coefficient of heat conductivity of layer of powder of hydride of aluminium was carried out. This value is 0,35 W/(m×K).
KEY WORDS: effective coefficient of heat conductivity, hydride, composite, thermal expanded graphite, porosity.
HIGH LUMINOSITY PHOTON BEAMS PRODUCTION ON ELECTRON ACCELERATORS
N.A. Dovbnya, G.D. Pugachov, I.I. Shapoval
Full Text : (450 kB, Ukr.)
The possibility of a pulsed electron beam conversion with the energy of 25 - 40 MeV and the mean power of ~ 20 kW into a high luminosity photon beam is considered. Electron beam transverse
dimension on the convertor is s ~ 3 mm. Cooling of rotating tantalum convertor is performed with thermal radiation. Power density of electron beam is 100 - 150 kW/cm2. The GEANT package is used
for calculation of photon and electron beam density on the target for isotopes production on the 25 and 40 MeV electron energy and with various tantalum convertors thickness. Electron beam
density distribution on the convertor was taken as normal with s ~ 3 mm. Obtained angle distribution and energy photon spectrum with the energy above 9 MeV (100Mo(g,n)99Mo reaction threshold) is consistent with experimental results. Photon flux density emitted from all tantalum convertors with the 1 - 7 mm thickness is maximal for angles smaller than 10°. and sharply increase while the electrons beam energy growth. The calculation of thermal load and mechanical stress, which occurs due to power electron beam interaction with the tantalum convertor, is done. It is shown that such
conversion scheme provides high luminosity photon beam production, and the convertor material is able to stand continuous thermal and mechanical load. Parameters of such photons beam
will allow getting high specific activity of radiated materials and technological effectiveness of radiochemical processes, and, as a result, competitiveness of medical and other radioisotopes
production on electron accelerators.
KEY WORDS: high luminosity photon beams, radioisotopes production, numerical simulation, convertor, thermal load.
EFFECTS OF H-MODE TRANSITION ON PLASMA FLOW CHARACTERISTICS IN THE HELICAL DIVERTOR OF THE URAGAN-3M TORSATRON
Ye.L. Sorokovoy, V.V. Chechkin, L.I. Grigoríeva, E.L. Sorokovoy, A.A. Beletskii, A.S. Slavnyj, Yu.S. Lavrenovich, Ye.D. Volkov, P.Ya. Burchenko, S.A. Tsybenko, A.V. Lozin, A.Ye. Kulaga, D.V. Kurilo, Yu.K. Mironov, V.S. Romanov
Full Text : (490 kB, Eng.)
In the l=3/m=9 Uragan-3M (U-3M) torsatron with an open helical divertor and RF produced and heated plasmas, effects of H-mode transition on (i) diverted plasma flow (DPF) magnitude in the
spacings between the helical coils and (ii) fast ion escape into DPF are studied by using arrays of plane Langmuir probes and electrostatic ion energy analyzers. Data have been obtained on
how the amount and energy of lost ions change with transition in several field periods. A strong toroidal nonuniformity in ion loss has been observed. The island structure of the real U-3M
magnetic configuration and the locality of RF power injection into the plasma are considered as possible reasons for such nonuniformity.
KEY WORDS: torsatron, divertor, H-mode, fast ions, ion loss, island structure.
THE DOUBLE-STAGE PLASMA SOURCE WITH VACUUM ARC DISCHARGE FOR SEPARATOR
V.A. Seroshtanov, S.V. Shariy, V.B. Yuferov, O.S. Druy, V.V. Yegorenkov, E.V. Rybas
Full Text : (200 kB, Rus.)
The plasma source for carrying out of demonstration-imitating experiment on a separator is being developed. The plasma density for experiment consists 1010-1013 cm-3 and ion current more
then 1 ņ. The energy factors and enough productivity support problems are described. The construction and experimental research output of double-stage plasma source with vacuum arc
discharge have been produced. The current-voltage characteristics of source, ion current and plasma discharge current were measured. The amenity of plasma source for demonstration-
imitating separator experiments has been considered.
KEY WORDS: plasma separator, energy factors, productivity of separator, compressed vacuum arc discharge, ion current, magnetic plug.
SYSTEMS WITH SELF-EXCITATION OF RF OSCILATIONS FOR FORMATION, HEATING AND SEPARATION OF MULTICOMPONENT PLASMA
Yu.V. Kovtun, E.I. Skibenko, V.B. Yuferov
Full Text : (370 kB, Rus.)
In the most part of currently known magneto-plasma separation devices one applies RF and microwave techniques for plasma formation and heating with the use of RF and microwave
oscillators, placed outside of the plasma-volume objects, and of inside antenna systems. As an alternative, the separation devices can be applied, in which the conditions of plasma formation
and heating are provided by the physical mechanisms being developed in the plasma itself and leading to the effective self-excitation of rf oscillations responsible for the ion heating. In the
paper the authors consider two opportunities of plasma separation using the discharges of two types - beam-plasma discharge and reflective discharge in which the self-excitation of rf
oscillations can occur with frequencies and increments of an order of an ion-cyclotron frequency, and, consequently, the plasma formation and heating, including the selective ion heating with
KEY WORDS: plasma, discharge, separation, RF oscillations, heating, ions.
STATIONAR GAS PLASMA SOURCE OF HEAVY IONS WITH CLOSED ELECTRON DRIFT
S.V. Shariy, V.A. Seroshtanov, V.B. Yuferov, O.S. Druy, V.V. Yegorenkov, E.V. Rybas
Full Text : (450 kB, Rus.)
The construction and experimental research output of stationary gas plasma source of heavy ions with closed electron drift have been produced. The gas block in the source is made as
hollow body of conical form. This allows to make a supplement area of ion formation carried out from borders of acceleration area. The workgas expense have been vary within 3 to 20
cm3/min, and vacuum camera pressure have been vary within 1×10-4 - 8×10-4 “Órr. The current-voltage characteristics of source, ion current and plasma discharge current were
measured. The measurement of ion currents on axial and radial collectors shown in preference the radial current 1 A, however the axial current make up 30 mA. The amenity of plasma
source for demonstration-imitating separator experiments has been considered.
KEY WORDS: plasma separator, hall plasma source, electron's drift, ion current, highfrequency pulsing.