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Wyszukujesz frazę "Juha, L." wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    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:
    Biological Action in and out of the Water Window
    Autorzy:
    Vyšín, L.
    Davídková, M.
    Wachulak, P.
    Fiedorowicz, H.
    Bartnik, A.
    Krůs, M.
    Kozlová, M.
    Skála, J.
    Dostál, J.
    Dudžák, R.
    Juha, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1029783.pdf
    Data publikacji:
    2018-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.14.G-
    52.38.-r
    Opis:
    This study is dealing with the difference of radiation chemical yields of single and double strand breaks induced in plasmid DNA by photons inside and outside of the soft X-ray water window, i.e., in the wavelength range from 2.28 nm to 4.88 nm. Photons were generated by various plasma sources providing nanosecond and sub-nanosecond pulses of extreme ultraviolet, soft X-ray and X-ray radiation. DNA strand breaks were determined by agarose gel electrophoresis. Higher radiation chemical yields of both single and double strand breaks were found using picosecond and nanosecond sources of extreme ultraviolet and X-ray radiation.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 2; 236-238
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    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
    Tytuł:
    Desorption/ablation of lithium fluoride induced by extreme ultraviolet laser radiation
    Autorzy:
    Blejchař, T.
    Nevrlý, V.
    Vašinek, M.
    Dostál, M.
    Kozubková, M.
    Dlabka, J.
    Stachoň, M.
    Juha, L.
    Bitala, P.
    Zelinger, Z.
    Pira, P.
    Wild, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/146227.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    desorption
    fluid dynamics
    lithium fluoride
    numerical simulation
    plume expansion
    pulsed laser ablation
    Opis:
    The availability of reliable modeling tools and input data required for the prediction of surface removal rate from the lithium fluoridetargets irradiated by the intense photon beams is essential for many practical aspects. This study is motivated by the practical implementation of soft X-ray (SXR) or extreme ultraviolet (XUV) lasers for the pulsed ablation and thin fi lm deposition. Specifically, it is focused on quantitative description of XUV laser-induced desorption/ablation from lithium fluoride, which is a reference large band-gap dielectric material with ionic crystalline structure. Computational framework was proposed and employed here for the reconstruction of plume expansion dynamics induced by the irradiation of lithium fluoridetargets. The morphology of experimentally observed desorption/ablation craters were reproduced using idealized representation (two-zone approximation) of the laser fluence profile. The calculation of desorption/ablation rate was performed using one-dimensional thermomechanic model (XUV-ABLATOR code) taking into account laser heating and surface evaporation of the lithium fluoridetarget occurring on a nanosecond timescale. This step was followed by the application of two-dimensional hydrodynamic solver for description of laser-produced plasma plume expansion dynamics. The calculated plume lengths determined by numerical simulations were compared with a simple adiabatic expansion (blast-wave) model. The availability of reliable modeling tools and input data required for the prediction of surface removal rate from the lithium fluoridetargets irradiated by the intense photon beams is essential for many practical aspects. This study is motivated by the practical implementation of soft X-ray (SXR) or extreme ultraviolet (XUV) lasers for the pulsed ablation and thin fi lm deposition. Specifically, it is focused on quantitative description of XUV laser-induced desorption/ablation from lithium fluoride, which is a reference large band-gap dielectric material with ionic crystalline structure. Computational framework was proposed and employed here for the reconstruction of plume expansion dynamics induced by the irradiation of lithium fluoridetargets. The morphology of experimentally observed desorption/ablation craters were reproduced using idealized representation (two-zone approximation) of the laser fluence profile. The calculation of desorption/ablation rate was performed using one-dimensional thermomechanic model (XUV-ABLATOR code) taking into account laser heating and surface evaporation of the lithium fluoridetarget occurring on a nanosecond timescale. This step was followed by the application of two-dimensional hydrodynamic solver for description of laser-produced plasma plume expansion dynamics. The calculated plume lengths determined by numerical simulations were compared with a simple adiabatic expansion (blast-wave) model.
    Źródło:
    Nukleonika; 2016, 61, 2; 131-138
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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