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    Wyświetlanie 1-15 z 15
    Tytuł:
    Modeling of the behavior of in - vessel mirrors for ITER with ECR plasma discharges
    Autorzy:
    Voitsenya, V. S.
    Bardamid, A. F.
    Belyaeva, A. I.
    Bondarenko, V. N.
    Davis, J. W.
    Konovalov, V. G.
    Mukhin, E. E.
    Razdobarin, A. G
    Ryzhkov, I. V.
    Shapoval, A. N.
    Shtan, A. F.
    Skoryk, O. A.
    Solodovchenko, S. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/147820.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    ECR plasma
    mirrors for plasma diagnostics in ITER
    structure
    sputtering
    chemical erosion
    Opis:
    The main experimental results related to the problems associated with in-vessel mirrors in ITER obtained with the DSM-2 facility at the Kharkov Institute of Plasma Physics over the past few years are described and discussed. Mirrors made from various polycrystalline (Be, Al, SS, Cu, Mo, Ta, W) and single crystal (Ni, SS, Mo, W) metals, metal films (Be, Cu, Mo, Rh) on different metal substrates (V, SS, Cu, Mo), and an amorphous alloy (ZrTiCuNiBe) have been studied. In addition, the behavior of protective oxide coatings under plasma bombardment has also been analyzed.
    Źródło:
    Nukleonika; 2012, 57, 2; 157-162
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New possibility for the use of plasma discharges to identify amber and changes in amber structure
    Autorzy:
    Gnapowski, S.
    Lenik, K.
    Szwed, G.
    Akiyama, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/103303.pdf
    Data publikacji:
    2012
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    amber
    pulsed power plasma discharge
    shock wave
    cracks
    silicone oil
    red color amber
    Opis:
    Pulsed power discharge applied in air to the amber surface was found to cause improvement in its appearance and color changes such as to red, a color not natural to amber but attractive for jewelry. Needle and plate electrodes were used during experiments. Pulsed power discharges in air particularly turned amber red at the edges and around the needle electrode. Discharges in water did not change amber structure because discharge occurring on the surface does not cross the amber structure. Discharges in silicone oil had a different effect, with most discharge passing through the amber structure, causing fine cracks. Unfortunately, the absence of a consistent amber structure causes difficulty in selecting the correct discharge (shock wave) power. Using new technology, we have changed the appearance a very old material-amber (about 40 – 60 million years old) – to make it more attractive for customers; this technology is also useful for detecting artificial amber (costume jewellery) without causing damage to the product.
    Źródło:
    Advances in Science and Technology. Research Journal; 2012, 6, 16; 1-6
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of the Longitudinal Magnetic Field on the Electrical Breakdown in Argon and Nitrogen Plasma Discharges
    Autorzy:
    Khalaf, Mohammed K.
    Mohammed, Sabri J.
    Majeed, Muataz A.
    Jasim, Hanaa E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1192598.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Paschen curves
    Minimum breakdown voltage
    Townsend coefficient
    Ionization efficiency
    Permanent Magnet
    Opis:
    The electrical breakdown has been studied for low-pressure argon and nitrogen discharges under the influence of a longitudinal magnetic field. Plane-parallel stainless steel electrodes (7.25 cm diameter) separated at the distance d (2.0 cm) were sustained with a dc voltage (0 - 700 V). Permanent magnets was used to produce an uniform magnetic field (B = 855G) parallel to the discharge axis. Paschen curves are obtained and the first Paschen curves, these curves are plotted for fixed values of B = 0 and B = 855 Gauss. The effect of longitudinal magnetic field becomes more significanor to obtain values of η, but it is less for the values of γ, separations (2cm) and different working pressure contributes Townsend discharge regime at a new range of plane-parallel electrode. The results show that by increasing of magnetic field Townsend coefficient and the ionization efficiency of the system significantly enhances.
    Źródło:
    World Scientific News; 2016, 55; 114-125
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The role of anomalous resistivities in Plasma Focus discharges
    Autorzy:
    Bruzzone, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/148185.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    anomalous resistivity
    pinches
    plasma focus
    Opis:
    The existence of plasma microturbulence in Plasma Focus (PF) devices is a widely accepted fact within the PF community. This microturbulence must be generated as a final stage of microscopic instabilities, which could develop during certain phases of the plasma evolution. Among the candidate instabilities to occur in these devices, the lower hybrid drift instability is the one with better possibilities, because its triggering condition (electron drift velocity approaching ion thermal velocity) has reasonable chances to be fulfilled. The main effect of the development of this instability is the modification of the collision frequencies in the plasma, which adds an anomalous term to the plasma resistivity. The theory for evaluating this extra term exists, and has been already used in PF 1D numerical simulations and in Z-pinch calculations. The role of this anomalous resistivity in PF behaviour has been the subject of considerable speculations. In this work, a 1D MHD (magnetohydrodynamics) calculation of the pinch stage in a PF device will be presented, including anomalous resistivity effects and their influence on electric fields and the discharge current are discussed.
    Źródło:
    Nukleonika; 2001, 46, suppl. 1; 3-7
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of diaphragms on measurements of ions emitted from dense magnetized plasmas
    Autorzy:
    Skladnik-Sadowska, E.
    Sadowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/146562.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    diagnostic of ions
    energy distribution
    plasma discharges
    separate ions
    Opis:
    The paper concerns the diagnostics of ions escaping from dense magnetized plasma (DMP) discharges. Particular attention is paid to the basic problem of the separation of such ions from the investigated plasma, under the condition that this process should not disturb the velocity (and energy) distribution functions of the measured ions.
    Źródło:
    Nukleonika; 2001, 46, suppl. 1; 57-60
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stabilizing of Z-pinch and Plasma Focus discharges due to thick wires
    Autorzy:
    Kubeš, P.
    Kravárik, J.
    Paduch, M.
    Tomaszewski, K.
    Scholz, M.
    Karpinski, L.
    Szydlowski, A.
    Bakshaev, Y.
    Blinov, P.
    Chernenko, A. S.
    Gordeev, E. M.
    Dan’ko, S. A.
    Korolev, V. D.
    Shashkov, A.
    Tumanov, V. I.
    Romanova, V.
    Klír, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/146991.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    plasma focus
    X-ray source
    XUV spectroscopy
    Z-pinch
    Opis:
    This paper presents the results of the diagnostics observing the impact of the plasma sheath imploded in megaamper Z-pinch or plasma focus devices onto the Al or C wires of 30-300 mi m in diameter fixed in the center axis. The discharges were operated with a maximum current of 1.5-3 MA at two devices, PF 1000 at IPFLM in Warsaw, and Stand 300 at RRC Kurchatov Institute in Moscow. At the plasma impact the 10-50 ns XUV pulse was emitted in K-shell lines from the ring or helical-like forms on the surface of the wire corona. The scenario of the production of the non-equilibrium intensities of the C and Al H-like and He-like lines is discussed considering fast transformation of magnetic field, electron beams acceleration, total ionization of the ions and fast recombination in dense and magnetized wire corona.
    Źródło:
    Nukleonika; 2001, 46, 1; 5-7
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Plasma Focus discharges in the PF-360 facility with additional D2 gaspuffed targets
    Autorzy:
    Stanislawski, J.
    Baranowski, J.
    Sadowski, M.
    Zebrowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/147013.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    current sheath
    deuteron beams
    gas puffing
    neutron yield
    plasma focus
    Opis:
    The paper describes experimental studies of Plasma-Focus (PF) discharges carried out within the modernized PF- 360 facility, which was operated with an additional D2-gas puffing into the region of the collapsing current sheath and PF pinch formation, i.e. into space in front of the electrode outlet. The main aim of these studies was to increase a neutron yield from PF discharges by using fast deuteron beams, which are usually emitted from a pinch column and which can interact with additional D2-gas target.
    Źródło:
    Nukleonika; 2001, 46, suppl. 1; 73-75
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies of Plasma-Focus discharges within the PF-360 facility equipped with needle D2O-ice target
    Autorzy:
    Baranowski, J.
    Jakubowski, L.
    Sadowski, M.
    Zebrowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/147583.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    cryogenic target
    current sheath
    neutrons yield
    plasma focus
    X-ray
    Opis:
    The paper describes a new technique which has been investigated in order to overcome the neutron saturation effect and to increase the neutron yield from the plasma-focus (PF) discharges [1]. The PF-360 experimental facility was constructed at the Andrzej Soltan Institute for Nuclear Studies (IPJ) in Swierk, Poland in the late 70s [4, 5]. Recently in order to improve the neutron yield from the PF-360 machine, it was proposed to use a cryogenic deuterium target, which might be placed within the plasma-focus region. For this purpose, we have been made a needle-like cryogenic target covered with a thin „heavy-ice“ layer. A considerable increase in the average neutron yield (from 1.7×1010 to about 2.2×1010 neutrons/shot) has been achieved for 122 kJ PF discharges when the needle target top was placed at a distance of about 100 mm from the electrode ends.
    Źródło:
    Nukleonika; 2001, 46, suppl. 1; 69-71
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies of Plasma-Focus discharges within the PF-360 facility equipped with a planar D2O-ice target
    Autorzy:
    Zebrowski, J.
    Baranowski, J.
    Jakubowski, L.
    Sadowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/147057.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    cryogenic target
    ion beams
    neutron yield
    plasma focus
    X-rays
    Opis:
    The paper reports on investigations of dense magnetized plasmas produced within a modernized PF-360 facility, which was operated with an additional planar cryogenic target placed in the front of the electrode outlet and covered with D2O-ice layers. The main aim of these studies was to overcome the neutron saturation effect and to increase the maximum neutron yield from PF discharges by using fast deuteron beams. Such beams are usually emitted from a pinch region and can produce fast neutrons from D-D reactions during their interactions with the additional target.
    Źródło:
    Nukleonika; 2001, 46, suppl. 1; 65-68
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diagnostics of non - equilibrium plasma generated in dielectric barrier discharges
    Autorzy:
    Janus, H. W.
    Musielok, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/146403.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    dielectric barrier discharges
    hydrogen spectrum
    line broadening
    plasma diagnostics
    Stark effect
    Opis:
    Results of electrical and spectroscopic diagnostics of dielectric barrier discharges by applying ceramic plates made of high permittivity material are presented. The spectroscopic diagnostic is based on analysis of spectral and spatial distribution of the hydrogen H alfa emission in the gas gap. From these measurements, e.g. the distributions of electric field strength and kinetic energy of excited hydrogen atoms in the discharge volume have been determined.
    Źródło:
    Nukleonika; 2012, 57, 2; 253-256
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Obtaining of metallic nanoparticles by plasma-erosion electrical discharges in liquid mediums for biological application
    Uzyskiwanie nanocząstek metali poprzez wyładowania elektryczne w zakresie erozji plazmy w środowisku wodnym w zastosowaniach biologicznych
    Autorzy:
    Lopatko, K.G.
    Melnichuk, M.D.
    Aftandilyants, Y.G.
    Gonchar, E.N.
    Boretskij, V.F.
    Veklich, A.N.
    Zakharchenko, S.N.
    Tugay, T.I.
    Tugay, A.V.
    Trach, V.V.
    Powiązania:
    https://bibliotekanauki.pl/articles/56253.pdf
    Data publikacji:
    2013
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    metallic nanoparticle
    nanoparticle
    biological function
    plasma
    electrical discharge
    liquid medium
    biological application
    Opis:
    Obtaining of metallic nanoparticles by plasma-erosion electrical discharges in liquid mediums for biological application. The process of electrical discharge in the water of the plasma discharge channel was investigated and its diagnostics was performed. The specific features of the energy redistribution were shown, together with the physical model of the dispersed phase. The biological functionality of the metal nanoparticles and the prospects for their use in biotechnology were found.
    Uzyskiwanie nanocząstek metali poprzez wyładowania elektryczne w zakresie erozji plazmy w środowisku wodnym w zastosowaniach biologicznych. Przeprowadzono badania wyładowań elektrycznych w środowisku wodnym w celu uzyskania nanocząstek metali. Określono specyficzne cechy redystrybucji energii oraz przedstawiono fizyczny model fazy rozproszonej. Określono funkcjonalność biologiczną nanocząsteczek metali oraz perspektywy ich wykorzystania w biotechnologii.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Agriculture; 2013, 61 Agric.Forest Eng.
    0208-5712
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Agriculture
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ultrafast X-ray introspective imaging of metallic objects using a Plasma Focus
    Autorzy:
    Moreno, C. H.
    Clausse, A.
    Martínez, J. F.
    Llovera, R.
    Tartaglione, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/146595.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    dense plasmas
    electrical discharges
    plasma focus
    X-ray imaging
    X-rays
    Opis:
    A compact-chamber 4.7 kJ, 30 kV, Plasma Focus operated in deuterium was used as a ultrafast high intensity radiation source for introspective radiographic imaging of metallic objects. The samples to be imaged were located outside the Plasma Focus chamber, about 1 m away from the chamber wall. A high-sensitivity, fast-response commercial radiographic film was used as a X-ray detector. Experimentally obtained images are presented showing a very high penetration power of the X-ray beam, demonstrating that the presented compact-chamber Plasma Focus is suited for introspective visualisation of pieces manufactured on metal.
    Źródło:
    Nukleonika; 2001, 46, suppl. 1; 33-34
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methane cracking and secondary hydrocarbon generation in inductively coupled RF plasmas
    Autorzy:
    Tabarés, F. L.
    Alegre, D.
    Mozetič, M.
    Vesel, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/146424.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    plasma
    RF discharges
    hydrocarbon cracking
    methane reforming
    plasma-assisted chemical vapour deposition (PACVD)
    carbon films
    Opis:
    Pure methane plasmas have been produced in an inductively coupled radio frequency (ICRF) reactor with quartz walls in the absence of carbon film deposition. A differentially pumped mass spectrometer was used for the recording of the secondary hydrocarbon species produced in the reactor. The functional dependences of these species with plasma parameters has been analyzed and tentative mechanisms for their formation have been formulated. High power per molecule ratio promotes methane decomposition and acetylene formation.
    Źródło:
    Nukleonika; 2012, 57, 2; 287-290
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of low-temperature corona discharges on gaseous pollutants level in diesel engines exhaust gas
    Autorzy:
    Irzycki, A.
    Kalina, P.
    Snopkiewicz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/246916.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    exhaust gas
    plasma reactor
    emissions of gaseous toxins
    experimental study
    Opis:
    This publication presents the results of research on level changes of gaseous pollutants contained in the exhaust gas in the consequence of applying of equipment taking advantage of low-temperature corona discharges. Not only influence of different plasma reactor configurations on the emission of toxins have been evaluated, but also on the main parameters of the engine under test and exhaust gas cleaning efficiency as well. The device supplied by DC voltage of 10-15 kV the operating value generated a low-temperature corona discharge in the especially formed electrostatic field. The devices were located behind the exhaust manifold of Diesel engine then operated in the high temperature zone of exhaust. The survey was realized in parallel with on-going research program at Institute of Aviation which has related to purification of Diesel engine's exhaust gas from particulates. The test results of emission of toxins obtained using the flat-arrangement and the axial-symmetric reactor systems were compared and discussed. The multi-variant designs of axial-symmetric device allowed the purposeful formation of favourable shape and intensity of electrostatic field and values of current, which induced the corona discharge. This activity has created better research capabilities for different geometric configurations of the reactors, namely linear and angular location and size of deflecting electrodes, structure of blade assembly generating a corona discharge, matching of proper distance between deflecting electrodes and blades.
    Źródło:
    Journal of KONES; 2010, 17, 2; 145-152
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parameters that influence the partial discharges occurrence in cavity defect within electrical cable insulation
    Autorzy:
    Elagoun, Abdelkader
    Seghier, Tahar
    Powiązania:
    https://bibliotekanauki.pl/articles/2203643.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    electrical cable insulation
    cavity defect
    partial discharge
    plasma model
    parameters influencing PDs
    kabel elektryczny
    izolacja
    wyładowania niezupełne
    model plazmowy
    Opis:
    The electrical cable reliability is largely linked to the state of its insulation, which can be threatened by the partial discharges (PDs) activity. This phenomenon is localized in defects created within insulation during the manufacture process and the cable installation. The cavity defect is among the most known defects within the insulating material filled with different gases and having various forms. Under electrical stress, the PDs occur and lead with time to a cable failure. The PDs simulation in cavity defect within cable insulation has became an important tool for a complementary understanding of the experimental task. The plasma model has been considered in last decade as an alternative to describe physically and chemically the PDs mechanism versus the other models such as the capacitance, conductance model. Using plasma model our work aims to simulate the PDs in cavity defect within cable insulation by showing the parameters influence such as the type of gas contained in the cavity, the voltage magnitude and frequency imposed on the insulation on their occurrence through its occurrence mechanisms. This helps to assess the PDs severity on the insulation system to carry out its diagnosis and therefore to have an effective reliability of cable.
    Źródło:
    Diagnostyka; 2023, 24, 2; art. no. 202321
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-15 z 15

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