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Wyszukujesz frazę "Krása, J." wg kryterium: Autor

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Real-time diagnostics of fast light ion beams accelerated by a sub-nanosecond laser
    Autorzy:
    Margarone, D.
    Krása, J.
    Picciotto, A.
    Prokupek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/146632.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    laser-driven acceleration
    ion beams
    real-time diagnostics
    Opis:
    Multi-MeV proton and light ion beams had been produced using the 300 ps, kJ-class iodine laser, operating at Prague Asterix Laser System (PALS) Centre in Prague. The target material had been chosen in such a way so as to increase the proton beam current density (approaching 0.1 A/cm2 at the distance of 1 m from the source). The real-time ion detection was performed by means of a standard flat and ring ion collectors (IC) in the time-of-flight (TOF) configuration. The ICs had been shielded with aluminum foils of various thickness, in order to cut the long photo-peak contribution that is usually overlapping with the ultrafast particle signal, and to analyze mainly the laser-accelerated proton beam. The processing of the obtained experimental IC data is described in some detail, including the deconvolution of TOF signals, evaluation of the UV/soft-X-ray photo-peak absorption, and ion transmission calculations for different metallic filters.
    Źródło:
    Nukleonika; 2011, 56, 2; 137-141
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Limitations of thermoluminescent dosimeters in soft X-ray diagnostics of pulsed plasma
    Autorzy:
    Krása, J.
    Fárníková, M.
    Juha, L.
    Cejnarová, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147287.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    dosimetry of photons
    thermoluminescent dosimeters
    X-ray plasma diagnostics
    Opis:
    Responses of thermoluminescent dosimeters (TLDs) of CaF2:Dy, CaF2:Mn, and LiF:Mg,Cu,P to the deposited energy of monochromatic 1.75–3.5 keV radiation were measured with respect to an increase in the local dose due to the attenuation length that was much shorter than the TLD thickness. The responses of TLDs to X-ray emission from the laserproduced aluminium plasma were found to be independent of the dose rate within a wide range.
    Źródło:
    Nukleonika; 2001, 46, suppl. 1; 49-51
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Time-integrated diagnostics of X-ray emission from PALS and PF 1000 : preliminary results
    Autorzy:
    Ryć, L.
    Krása, J.
    Juha, L.
    Kaczmarczyk, J.
    Paduch, M.
    Parys, P.
    Tomaszewski, K.
    Scholz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/148024.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    high-temperature plasma
    semiconductor detector
    thermoluminescent detector
    X-ray diagnostics
    Opis:
    Thermoluminescent and semiconductor detectors operating in an integrating mode have been applied to the measurement of X-ray flashes of high intensity from large plasma facilities. A detection head of special kind has been developed to perform comparison measurements with the use of the detectors of both kinds.
    Źródło:
    Nukleonika; 2001, 46, suppl. 1; 41-43
    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:
    Electromagnetic pulses produced by expanding laser - produced Au plasma
    Autorzy:
    De Marco, M.
    Cikhardt, J.
    Krása, J.
    Velyhan, A.
    Pfeifer, M.
    Krouský, E.
    Klír, D.
    Řezáč, D.
    Limpouch, J.
    Margarone, D.
    Ullschmied, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/147922.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    laser-produced plasma
    electromagnetic pulse (EMP)
    return target current
    Moebius loop antenna
    inductive target probe
    Opis:
    The interaction of an intense laser pulse with a solid target produces large number of fast free electrons. This emission gives rise to two distinct sources of the electromagnetic pulse (EMP): the pulsed return current through the holder of the target and the out flow of electrons into the vacuum. A relation between the characteristics of laser-produced plasma, the target return current and the EMP emission are presented in the case of a massive Au target irradiated with the intensity of up to 3 × 1016 W/cm2. The emission of the EMP was recorded using a 12 cm diameter Moebius loop antennas, and the target return current was measured using a new type of inductive target probe (T-probe). The simultaneous use of the inductive target probe and the Moebius loop antenna represents a new useful way of diagnosing the laser–matter interaction, which was employed to distinguish between laser-generated ion sources driven by low and high contrast laser pulses.
    Źródło:
    Nukleonika; 2015, 60, 2; 239-243
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy transformation in Plasma Focus discharge with wire and liner as a load
    Autorzy:
    Kubeš, P.
    Kravárik, J.
    Klír, D.
    Scholz, M.
    Paduch, M.
    Tomaszewski, K.
    Karpinski, L.
    Ryc, L.
    Juha, L.
    Krasa, J.
    Szydlowski, A.
    Romanova, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/147107.pdf
    Data publikacji:
    2002
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    plasma focus
    X-ray source
    XUV spectroscopy
    Opis:
    We present the results of experiments focused on energy transformations during the implosion of the hydrogen current sheath towards an Al wire (120 ěm in diameter) positioned on the top of the inner electrode of the PF-1000 plasma focus facility at the IPPLM in Warsaw. A wire corona is formed at the current sheath impact and ~60 ns after the impact a soft X-ray pulse is emitted. Its spectrum contains AlVI-XII lines accompanied by their satellites. The amount of emitted energy is recorded by two filtered PIN diodes and thermoluminescent dosimeters and depends on symmetry of the current sheath and quality of the current sheath focus. The mean value of energy of keV photons emitted in the runs done without the wire (~1 J) is higher than the energy obtained with the wire (~0.4 J). A time delay between the impact of the current sheath and X-ray pulse, the plasma focus dynamics and soft X-ray emission are interpreted by an axial magnetic field generation and transformations.
    Źródło:
    Nukleonika; 2002, 47, 4; 151-153
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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