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    Wyświetlanie 1-12 z 12
    Tytuł:
    PF-6 an effective plasma focus as a source of ionizing radiation and plasma streams for application in material technology, biology and medicine
    Autorzy:
    Gribkov, V.
    Dubrovsky, A.
    Scholz, M.
    Jednorog, S.
    Karpiński, L.
    Tomaszewski, K.
    Paduch, M.
    Miklaszewski, R.
    Pimenov, V.
    Ivanov, L. I.
    Dyomina, E. V.
    Maslyaev, S. A.
    Orlova, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147424.pdf
    Data publikacji:
    2006
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    dense plasma focus (DPF)
    ion beam
    plasma beam
    X-ray beams
    surface damage
    microlithography
    radioenzymology
    positron emission tomography (PET)
    Opis:
    A review of results on the design and operation of the new efficient Dense Plasma Focus device PF-6 of medium size (transportable) having bank energy of ca. 7 kJ and possessing a long lifetime is presented. New data on the interaction of the pulsed fast ion beams and dense plasma streams generated at this apparatus with various materials are given. These results are compared with the analogous information received at the biggest facility PF-1000. It is shown that it is possible to have about the same power flux density (in the range of 105 109 W/cm2) in both devices however in different areas. Doses of soft X-rays produced by the device within the resists for the goals of microlithography and micromachining appear to be several times less that it is with the conventional X-ray tube. In biological application of this device, medium- and hard-energy X-rays are exploited in the field of radioenzymology. It was found that the necessary dose producing activation/inactivation of enzymes can be by several orders of magnitude lower if used at a high-power flux density in comparison with those received with isotope sources. In medicine, short-life isotope production for the goals of the positron emission tomography (medicine diagnostics) is possible by means of the fast ions generated within DPF. All these experiments are discussed in the framework of pulsed radiation physics and chemistry in its perfect sense thereto the criteria are formulated.
    Źródło:
    Nukleonika; 2006, 51, 1; 55-62
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Plasma Focus as a lens for intense ion beam focusing
    Autorzy:
    Belan, V. N..
    Butenko, V. I.
    Ivanov, B. I.
    Kiseleva, V. A.
    Kitsenko, A. B.
    Linnik, A. F.
    Maslov, V. I.
    Onishchenko, I. N.
    Prishchepov, V. P.
    Yegorov, A. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/147316.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    intense MeV proton beam accelerator
    plasma focus
    plasma lens
    Opis:
    Experimental investigations were performed to evaluate the focusing properties of the plasma focus for high-energy intense ion beams manipulating. Magnetic probes and optical spectroscopy were used for temporal and spatial plasma geometry investigations. Ion beam portrait was determined at the luminescence screen. In the experiments performed, the focusing coefficient was obtained as the ten times beam compression at the 30 cm length. By variations of the gas volume input, gun voltage, time delay, magnetic field value etc. the dependence of focused ion beam diameter upon various parameters of the plasma focus lens has been investigated. It was revealed that the main focusing effect was caused by the azimuthal magnetic field of the currents carried by the plasma.
    Źródło:
    Nukleonika; 2001, 46, suppl. 1; 35-36
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On possible formulation of problems of a Dense Plasma Focus used in material sciences
    Autorzy:
    Gribkov, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/146787.pdf
    Data publikacji:
    2000
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    cumulative plasma streams
    dense plasma focus (DPF)
    electron beam
    ion beam
    material sciences
    neutrons
    X-rays
    Opis:
    The paper describes various possibilities at can be given by the use of dense plasma focus (DPF) device in material sciences. Main distinguishing features of such a device – availability of several different types of hard radiation and its high power flux density – determine the niche of applications of this type devices in the field. Some directions of materials investigation and treatment, which can be developed at present time, are discussed.
    Źródło:
    Nukleonika; 2000, 45, 3; 149-153
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies of plasma and craters produced by the interaction of high-energy sub-nanosecond laser with silver target
    Autorzy:
    Woryna, E.
    Badziak, J.
    Parys, P.
    Suchańska, R.
    Wołowski, J.
    Krása, J.
    Láska, L.
    Pfeifer, M.
    Rohlena, K.
    Ullschmied, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/147102.pdf
    Data publikacji:
    2002
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    ion beam
    laser
    laser-induced crater
    plasma
    Opis:
    The results of measurements of microablation from a silver target irradiated by the high-power PALS laser system in Prague are presented. In this experiment the laser beam of energy of about 110 J in a 400 ps pulse was focused perpendicularly to the massive silver target. The target surface position was changed with respect to the focal spot of the laser beam in the range from -2.5 to 2.5 mm. A set of four ion collectors was used for plasma ion emission measurements. The effect of the laser pulse interaction with the target, i.e. craters and damages formed in the vicinity of the craters, were investigated with the use of scanning electron microscopy (SEM) and optical microscopy methods. The characteristics of the crater were compared with the essential parameters of ion streams emitted from the plasma produced in the same laser shot.
    Źródło:
    Nukleonika; 2002, 47, 4; 147-150
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of powerful pulses of hydrogen plasma upon materials in PF-1000 device
    Autorzy:
    Pimenov, V.
    Gribkov, V.
    Dubrovsky, A.
    Mezzetti, F.
    Scholz, M.
    Ugaste, U.
    Dyomina, E.
    Ivanov, L.
    Maslyaev, S.
    Miklaszewski, R.
    Borowiecki, M.
    De Chiara, P.
    Pizzo, L.
    Szydlowski, A.
    Volobuev, I. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/147096.pdf
    Data publikacji:
    2002
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    dense plasma focus (DPF)
    ion beam
    irradiation
    plasma jet
    surface damage
    test specimen
    Opis:
    The results of experimental investigations of powerful hydrogen plasma jets and fast ion beams interaction with various materials (austenitic chromium-manganese steels, pure vanadium, tungsten, graphite, copper, and their alloys: Cu-4 mass% Ni and Cu-10 mass% Ga) are presented. The materials were placed on the discharge axis of the PF-1000 device and irradiated with fluxes of fast ions (of energy in the range from tens keV up to several MeV) and with plasma streams (of power flux density q~(108 109) W/cm2). It was found that the fast ions and plasma streams caused different damages to the aforementioned materials. A diverse character of the damages to the individual investigated material was revealed. Some peculiarities of the process as well as the correlation between the surface density of the "macroscopic" structural defects (blisters and craters) and the fluence of the fast ions implanted in the specimen are discussed.
    Źródło:
    Nukleonika; 2002, 47, 4; 155-162
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Post acceleration of ions emitted from laser and spark - generated plasmas
    Autorzy:
    Torrisi, L.
    Cavallaro, S.
    Rosiński, M.
    Nassisi, V.
    Paperny, V.
    Romanov, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/146658.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    post ion acceleration
    laser plasma
    ion beam
    ion implantation
    Opis:
    Pulsed lasers at intensities of the order of 1010 W/cm2 interacting with solid matter in vacuum, produce hot plasmas at high temperatures and densities. The charge state distributions of the plasma generate a high electric field, which induces high ion acceleration along the normal to the target surface. The high yield of the emitted ions can generate a near constant current by using repetitive pulses irradiating thick targets. In order to increase ion energy, a post-acceleration system can be employed by using acceleration voltages above 10 kV. Special ion extraction methods can be employed to generate the final ion beam, which is multi-ionic and multi-energetic, due to the presence of different ion species and of different charge states. In this article four different methods of post ion acceleration, employed at the INFN-LNS of Catania, at the IPPLM of Warsaw, at the INFN of Lecce and at the LPI of Moscow, are presented, discussed and compared. All methods are able to implant ions in different substrates at different depth and at different dose-rates.
    Źródło:
    Nukleonika; 2012, 57, 3; 323-332
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ponderomotive self-focusing of a short laser pulse under a plasma density ramp
    Autorzy:
    Kant, N.
    Saralch, S.
    Singh, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/146636.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    self-focusing
    underdense plasma
    plasma density ramp
    ponderomotive force
    short laser pulse
    Gaussian beam
    Opis:
    The ponderomotive self-focusing of a short laser pulse in an underdense plasma under a plasma density ramp is analyzed. The pulse may acquire a minimum spot size due to the ponderomotive self-focusing. Beyond the focus, the nonlinear refraction starts weakening, and the spot size of the laser pulse increases, resulting in an oscillatory self-focusing and defocusing behavior of the beam with the propagation distance. In order to minimize the defocusing, we introduce a localized upward plasma density ramp. Due to the upward plasma density ramp, the laser beam retains a minimum spot size. Self-focusing becomes stronger with a mild ripple as the propagation distance increases. The conditions for the ponderomotive self-focusing for suitable parameters of the laser beam and the plasma are determined. The plasma density ramp of the considered type may be observed in gas jet plasma experiments.
    Źródło:
    Nukleonika; 2011, 56, 2; 149-153
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Neutron and fast ion emission from PF-1000 facility equipped with new large electrodes
    Autorzy:
    Szydlowski, M.
    Scholz, M.
    Karpinski, L.
    Sadowski, M.
    Tomaszewski, K.
    Paduch, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/147301.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    fast ion beam
    neutron emission anisotropy
    neutron yield
    plasma focus
    Opis:
    A PF-1000 facility was operated for the first time at an energy level of up to 1 MJ. The maximal emission of 2×1011 neutrons/shot was registered. Relatively low emission anisotropy was observed. Fast ion beams were generated only from shots performed at a low filling pressure (1-2 Torr).
    Źródło:
    Nukleonika; 2001, 46, suppl. 1; 61-64
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anisotropy of the neutron emission from PF-360 facility operated without and with solid-state targets
    Autorzy:
    Czaus, K.
    Baranowski, J.
    Sadowski, M.
    Skladnik-Sadowska, E.
    Zebrowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/146908.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    anisotropy
    beam-target mechanism
    dense plasma focus (DPF)
    neutron yield
    thermal mechanism
    Opis:
    The paper reports on detailed studies of an anisotropy of the fusion-produced neutrons emitted from the modernized PF-360 facility [10], which has been operated with a pure deuterium-gas filling, without and with some additional solidstate targets containing deuterium atoms. Under standard operational conditions, anisotropy of the neutron yield from the PF-360 facility is similar to that observed in other PF devices. For the first time the neutron emission anisotropy has been measured in the PF experiments performed with a planar cryogenic target covered with a heavy-ice (D2O) layer. Changes in the Yn(Φ)/Yn(90°) ratio, particularly for angles Φ = 0–60°, have been explained by the known features of the angular distribution of fast deuterons.
    Źródło:
    Nukleonika; 2001, 46, suppl. 1; 77-80
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Accounting of arc welding process specificity in innovative technologies
    Uchet specifiki precessa dugovojj svarki v innovacionnykh tekhnologijakh
    Autorzy:
    Druz, O.
    Gitnaya, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/792163.pdf
    Data publikacji:
    2012
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    welding process
    arc welding method
    protective environment
    economy
    innovative technique
    electron beam
    plasma
    financial viability
    energy consumption
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 3
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A review on electron beam flue gas treatment (EBFGT) as a multicomponent air pollution control technology
    Autorzy:
    Basfar, A. A.
    Fageeha, O. I.
    Kunnummal, N.
    Chmielewski, A. G.
    Licki, J.
    Pawelec, A.
    Zimek, Z.
    Warych, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/148616.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    fossil fuel combustion
    heavy fuel oil
    electron beam irradiation
    plasma processes
    flue gas treatment
    SO2 removal
    NOx removal
    Źródło:
    Nukleonika; 2010, 55, 3; 271-277
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of cutting technology on properties of the cut edges
    Wpływ technologii cięcia na właściwości warstwy wierzchniej stali krawędzi ciętych
    Autorzy:
    Węglowski, M.S.
    Pfeifer, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/175855.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    plasma cutting
    laser beam cutting
    water jet cutting
    oxyfuel flame cutting
    cięcie plazmą
    cięcie wiązką laserową
    cięcie strumieniem wody
    cięcie tlenem
    Opis:
    The influence of cutting technologies on the quality, mechanical properties and microstructure of the cut edges of steel is presented. The cutting technologies cover: plasma, laser beam, water jet and oxyfuel flame cutting. During investigation the measurements of perpendicularity tolerance, hardness, mean high of the profile Rz5 and metallographic examination were carry out. The results revealed that the lowest hardness was achieved by water jet cutting, whereas the highest was obtained by plasma cutting under the water surface. The lowest perpendicularity was obtained by plasma cutting under the water surface but the highest was achieved by laser and HD plasma cutting. The conducted experiments revealed moreover that the lowest roughness was achieved by means of plasma cutting over the water surface, whereas the highest by laser beam cutting.
    W pracy przedstawiono wpływ technologii cięcia na właściwości mechaniczne, mikrostrukturę i jakość warstwy wierzchniej. Technologie cięcia obejmowały cięcie: plazmą, wiązką laserową, strumieniem wody oraz tlenem. Prowadzono pomiary tolerancji prostopadłości, twardości, średniej wysokości profilu Rz5. Wykonano również badania metalograficzne. Najmniejsza twardość powierzchni po cięciu zapewnia cięcie strumieniem wody, natomiast największe cięcie plazmą pod lustrem wody. Najmniejszą tolerancję prostopadłości zapewnia cięcie plazmą pod lustrem wody, natomiast największą cięcie wiązką laserową i plazmą HD. Najmniejszą chropowatość powierzchni zapewnia technologia cięcia plazmą nad lustrem wody, natomiast największą wiązką laserową.
    Źródło:
    Advances in Manufacturing Science and Technology; 2014, 38, 2; 63-73
    0137-4478
    Pojawia się w:
    Advances in Manufacturing Science and Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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