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    Wyświetlanie 1-4 z 4
    Tytuł:
    Optical emission spectroscopy of plasma produced from tungsten target irradiated within RPI - IBIS facility
    Autorzy:
    Skladnik-Sadowska, E.
    Malinowski, K.
    Sadowski, M. J.
    Nowakowska-Langier, K.
    Ladygina, M. S.
    Garkusha, I. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/147510.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    optical spectroscopy
    free plasma stream
    RPI - IBIS facility
    plasma interaction with tungsten
    Opis:
    The paper presents recent research on characteristics of deuterium plasma streams generated within an RPI-IBIS (multi-rod plasma injector) facility, and optical spectra of plasma produced during the interaction of these streams with a tungsten target placed at a distance of 20 cm from the electrode outlets. Distinct WI- and WII-lines were recorded and the noticeable erosion of the W-target was observed for shots delivering more than 4 J/cm2 on the target surface.
    Źródło:
    Nukleonika; 2012, 57, 2; 193-196
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transient plasma loads to the ITER divertor surfaces : simulation experiments with QSPA Kh - 50
    Autorzy:
    Garkusha, I. E.
    Aksenov, N. N.
    Chuvilo, A. A.
    Landman, I. S.
    Makhlaj, V. A.
    Malykhin, S. V.
    Pugachev, A. T.
    Sadowski, M. J.
    Skladnik-Sadowska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/147812.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    plasma accelerator
    transient loads
    tungsten
    dust
    fusion reactor
    Opis:
    Experimental simulations of International Thermonuclear Experimental Reactor (ITER) transient events with relevant heat load and particle load parameters have been performed with a quasi-stationary plasma accelerator QSPA Kh-50. Pulsed plasma guns PPA and IBIS were also used for comparative studies of surface damages appearing under varying plasma parameters and sorts of plasma ions. Particular attention is paid to the material erosion due to particles ejection from the tungsten surfaces both in the form of droplets and solid dust. Generation mechanisms of the dust in the course of ELM-like plasma impacts to the tungsten surfaces are discussed
    Źródło:
    Nukleonika; 2012, 57, 2; 167-170
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies of plasma interactions with tungsten targets in PF-1000U facility
    Autorzy:
    Ladygina, M. S.
    Skladnik-Sadowska, E.
    Zaloga, D. R.
    Sadowski, M. J.
    Kubkowska, M.
    Kowalska-Strzeciwilk, E.
    Krawczyk, N.
    Paduch, M.
    Miklaszewski, R.
    Garkusha, I. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/147524.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    plasma-surface interaction
    plasma streams
    tungsten
    plasma focus
    PF-1000U
    Opis:
    This paper presents results of experimental studies of tungsten samples of 99.95% purity, which were irradiated by intense plasma-ion streams. The behaviour of tungsten, and particularly its structural change induced by high plasma loads, is of great importance for fusion technology. The reported measurements were performed within a modifi ed PF-1000U plasma-focus facility operated at the IFPiLM in Warsaw, Poland. The working gas was pure deuterium. In order to determine the main plasma parameters and to study the behaviour of impurities at different instants of the plasma discharge, the optical emission spectroscopy was used. The dependence of plasma parameters on the initial charging voltage (16, 19 and 21 kV) was studied. Detailed optical measurements were performed during interactions of a plasma stream with the tungsten samples placed at the z-axis of the facility, at a distance of 6 cm from the electrode outlets. The recorded spectra showed distinct WI and WII spectral lines. Investigation of a target surface morphology, after its irradiation by intense plasma streams, was performed by means of an optical microscope. The observations revealed that some amounts of the electrodes material (mainly copper) were deposited upon the irradiated sample surface. In all the cases, melted zones were observed upon the irradiated target surface, and in experiments performed at the highest charging voltage there were formed some cracks.
    Źródło:
    Nukleonika; 2016, 61, 2; 149-153
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of tungsten surface interaction with plasma streams at DPF-1000U
    Autorzy:
    Ladygina, M. S.
    Skladnik-Sadowska, E.
    Zaloga, D. R.
    Malinowski, K.
    Sadowski, M. J.
    Kubkowska, M.
    Kowalska-Strzeciwilk, E.
    Paduch, M.
    Zielinska, E.
    Miklaszewski, R.
    Garkusha, I. E.
    Gribkov, V. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147638.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    DPF-1000U
    electron density
    gas puffing
    plasma stream
    tungsten
    Opis:
    In this note experimental studies of tungsten (W) samples irradiated by intense plasma-ion streams are reported. Measurements were performed using the modified plasma focus device DPF-1000U equipped with an axial gas-puffing system. The main diagnostic tool was a Mechelle®900 optical spectrometer. The electron density of a freely propagating plasma stream (i.e., the plasma stream observed without any target inside the vacuum chamber) was estimated on the basis of the half-width of the Dβ spectral line, taking into account the linear Stark effect. For a freely propagating plasma stream the maximum electron density amounted to about 1.3 × 1017 cm–3 and was reached during the maximum plasma compression. The plasma electron density depends on the initial conditions of the experiments. It was thus important to determine first the plasma flow characteristics before attempting any target irradiation. These data were needed for comparison with plasma characteristics after an irradiation of the investigated target. In fact, spectroscopic measurements performed during interactions of plasma streams with the investigated W samples showed many WI and WII spectral lines. The surface erosion was determined from mass losses of the irradiated samples. Changes on the surfaces of the irradiated samples were also investigated with an optical microscope and some sputtering and melting zones were observed.
    Źródło:
    Nukleonika; 2015, 60, 2; 293-296
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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