Перегляд за автором "Dovbnya, A.N."

Сортувати за: Порядок: Результатів:

  • Features of adsorbed chemical elements and their isotopes distribution in iodine air filters FU-1500 of nuclear power plant 
    Neklyudov, I.M.; Dovbnya, A.N.; Dikiy, N.P.; Ledenyov, O.P.; Lyashko, Yu.V. (Вопросы атомной науки и техники, 2013)
    The main aim of research is to investigate the physical features of spatial distribution of the adsorbed chemical elements and their isotopes in the granular filtering medium in the iodine air filters of the type of AU-1500 ...
  • Formation of scanner magnetic-optical characteristics in the NSC KIPT new-generation electron linac KUT-20 
    Dovbnya, A.N.; Tolstoj, A.E.; Shendrik, V.A.; Semenets, T.A. (Вопросы атомной науки и техники, 2001)
    In view of the requirements for the new accelerator KUT-20, results of the preoperational test-bench development of electromagnetic scanner characteristics are reported. Urgent tasks are outlined for further improvement ...
  • Formation of the electron beamin a secondaryemission magnetron gun its starting by anodulum high-voltage pulse 
    Ayzatsky, N.I.; Dovbnya, A.N.; Mazmanishvili, A.S.; Reshetnyak, N.G.; Romas’ko, V.P.; Chertishchev, I.A. (Вопросы атомной науки и техники, 2018)
    The results of a study on the formation of an electron beam by a magnetron gun with a secondary-emission cathode (cathode diameter 36 mm, an anode 78 mm) in the voltage range 25...90 kV are presented. The secondaryemission ...
  • Formation of uniform electron beams on large-area targets 
    Dovbnya, A.N.; Dovbnya, N.A.; Kolot, Z.M.; Popenko, V.A.; Savchenko, A.N.; Styopin, D.L.; Shendrik, V.A. (Вопросы атомной науки и техники, 2004)
    The report describes the results of calculations and experimental studies of the system for scanning the beam on outside targets of electron accelerators by magnetic quadrupole lenses.
  • Forming electron beam pulses of a subnanosecond duration 
    Dovbnya, A.N.; Zakutin, V.V.; Reshetnyak, N.G.; Romas’ko, V.P.; Shenderovitch, A.M.; Semenets, T.A.; Volkolupov, Yu.Ya.; Krasnogolovets, M.A. (Вопросы атомной науки и техники, 2001)
  • In commemoration of the eightieth anniversary of the first artificial nuclear reaction realization 
    Dovbnya, A.N.; Shendryk, V.A. (Вопросы атомной науки и техники, 1999)
    In 1919, a distinguished English physicist Earnest Rutherford was the first to observe the nuclear reaction.
  • Influence of high-energy electrons irradiation on nanoceramics properties of zirconia 
    Aizatskyi, M.I.; Dikiy, N.P.; Dovbnya, A.N.; Fedorets, I.D.; Kushnir, V.A.; Lyashko, Yu.V.; Medvedev, D.V.; Mytrochenko, V.V.; Onishchenko, I.N.; Perezhogin, S.A.; Pelichatyi, N.M.; Danilenko, I.A.; Konstantinova, T.E. (Вопросы атомной науки и техники, 2013)
    Radiation defects in nanoceramics zirconia were investigated after electron irradiation with energy 41…89 MeV up to doze 2.28…5.7·10¹⁴ electrons/cm². Radioactive isotopes ⁸⁷,⁸⁸Y, ⁸⁸,⁸⁹,⁹⁵Zr, ⁹⁵Nb, ¹⁷⁵Hf are registered after ...
  • Investigation of actinide simulators migration in granite and tuff irradiated by gamma-quanta 
    Dubinko, V.I.; Dovbnya, A.N.; Sayenko, S.Yu.; Dikiy, N.P.; Shevyakova, E.P.; Grytsyna, V.M.; Surkov, A.E.; Bereznyak, E.P.; Lyashko, Yu.V.; Medvedeva, E.P. (Вопросы атомной науки и техники, 2006)
    Granite and tuff specimens have been γ- irradiated to the absorbed doses ranging from 10⁷ to 3.0·10⁸ Gy. Penetration profiles of cerium ¹³⁹Ce (actinide simulator) in granite and tuff specimens (before and after ...
  • Investigation of Chernobyl 4-th unit materials by gamma activation method 
    Dikiy, N.P.; Dovbnya, A.N.; Karnaukhov, I.M.; Lyashko, Yu.V.; Mazilov, A.V.; Shevyakova, E.P.; Tolstolutskiy, A.G.; Uvarov, V.L.; Glygalo, V.N.; Rudya, K.G. (Вопросы атомной науки и техники, 2002)
    Isotope and element content the samples of Chornobyl 4-th wrecking unit materials (concrete fragments and lava-like materials) were investigated by γ-activation method using bremsstrahlung of the electron accelerator. The ...
  • Investigation of electron beam transport in a magnetron gun with a secondary-emission cathode 
    Dovbnya, A.N.; Zakutin, V.V.; Reshetnyak, N.G. (Вопросы атомной науки и техники, 2006)
    Results are reported from the studies of electron beam generation in the magnetron gun and beam transport over distances of 3 and 40 mm. The studies have demonstrated that the beam current and the beam dimensions ...
  • Investigation of granite rocks radiation-chemical durability 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedeva, E.P.; Sayenko, S.Yu.; Tarasov, R.V.; Uvarov, V.L.; Kholomeyev, G.A.; Shevyakova, E.P.; Fedorets, I.D. (Вопросы атомной науки и техники, 2002)
    Gamma-activation analysis is used to study dynamics of leaching of various elements from granite samples. The sample preliminary irradiation and activation was carried out in the field of bremsstrahlung of electron ...
  • Investigation of stability electron beam parameters in sources with cold secondary-emission cathodes 
    Dovbnya, A.N.; Ayzatsky, N.I.; Boriskin, V.N.; Zakutin, V.V.; Kushnir, V.A.; Mitrochenko, V.A.; Reshetnyak, N.G. (Вопросы атомной науки и техники, 2004)
    The investigation into the generation of tubular electron beams and their parameters in a system of secondaryemission cathodes was carried out. The parameters of electron beams with the use of a multichannel measuring ...
  • Investigation of the ceramic windows used in linear electron accelerators of the NSC KIPT 
    Dovbnya, A.N.; Zlunitsyn, E.S.; Zykov, A.I.; Kramskoy, G.D. (Вопросы атомной науки и техники, 2004)
    The results of investigations of HF windows on the basis of ceramic cones (CC) from klystrons KIU-12АM are presented. Phenomena of “locking” of the windows and stationary shining of CC are studied. Their physical models are ...
  • Ion exchange in photoactivated inorganic matters 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedev, D.V.; Medvedeva, E.P.; Parhomenko, Yu.G.; Uvarov, V.L.; Fedorets, I.D. (Вопросы атомной науки и техники, 2017)
    The effects of monovalent and bivalent impurities on the diffusive mobility sodium, caesium and strontium in magnesium potassium phosphate hexahydrate and clinoptilolite were analysed. It was determined that ratio of ...
  • Isomer ratios of photonuclear reaction products on silver and indium isotopes for bremsstrahlung energies above 35 MeV 
    Bezshyyko, O.A.; Dovbnya, A.N.; Golinka-Bezshyyko, L.O.; Kadenko, I.M.; Kulakov, I.S.; Kushnir, V.A.; Mitrochenko, V.V.; Olejnik, S.N.; Tuller, G.E.; Vodin, A.N. (Вопросы атомной науки и техники, 2009)
    Isomer ratios were obtained for nuclei 104m,gAg and 110m,gIn-products of reactions 107Ag(γ,3n)104m,gAg and 113In(γ,3n)110m,gIn after bremsstrahlung irradiation with maximum energies 35 and 36 MeV , respectively. ...
  • Laser system of microwave picosecond pulse trains used for emission initiation in the photogun 
    Dyomin, V.S.; Dovbnya, A.N.; Reprintsev, L.V.; Shendrik, V.A. (Вопросы атомной науки и техники, 2006)
    The scheme of picosecond pulse train formation by scanning of a laser ray across the adjustable diaphragm by means of a microwave traveling-wave optical deflector is presented. After amplification and conversion these ...
  • Longitudinal-radial motion of an electron beam in the solenoidal field of the secundary-emission magnetron gun 
    Dovbnya, A.N.; Dovbnya, N.A.; Mazmanishvili, А.S.; Reshetnyak, N.G. (Вопросы атомной науки и техники, 2017)
    The results of experimental studies and numerical calculations on the generation of an electron beam by a magnetron gun with a secondary-emission cathode are presented. With the aim of obtaining precision characteristics, ...
  • Low doses of radiation: epidemiological investigations 
    Dikiy, N.P.; Dovbnya, A.N.; Medvedeva, E.P. (Вопросы атомной науки и техники, 2013)
    Influence of small dozes of radiation was investigated with the help epidemiologic evidence. Correlation analysis, regression analysis and frequency analysis were used for investigating morbidity of various cancer illnesses. ...
  • Magnetic field losses in Nd-Fe-B magnets under 10 MeV electron irradiation 
    Bovda, V.A.; Bovda, A.M.; Guk, I.S.; Dovbnya, A.N.; Lyashchenko, V.N.; Mytsykov, A.O.; Onischenko, L.V.; Kalinichenko, A.I.; Kandybei, S.S.; Repikhov, O.A. (Вопросы атомной науки и техники, 2017)
    Reversible changes in magnetic properties of Nd-Fe-B magnets under electron beam with the energy of 10 MeV and bremsstrahlung irradiation were investigated. It was shown that direct electron beam irradiation resulted in ...
  • Magnetic structure of the NSC KIPT nuclear and high energy physics electron accelerator 
    Dovbnya, A.N.; Guk, I.S.; Kononenko, S.G.; Peev, F.A.; van der Wiel, M.; Botman, J.I.M; Tarasenko, A.S. (Вопросы атомной науки и техники, 2004)
    The magnetic-optical structure of the basic NSC KIPT accelerator with a continuous electron beam of energy up to 730 MeV has been considered.