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Raporty IFJ PAN (IFJ PAN Reports)

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https://rifj.ifj.edu.pl/handle/item/2

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Browsing by Author "Bielecki, Jakub"

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    Assumptions for the design of a neutron pinhole camera dedicated to the PF-24 device
    (Institute of Nuclear Physics Polish Academy of Sciences, 2014) Scholz, Marek; Bielecki, Jakub; Wójcik-Gargula, Anna; Wiącek, Urszula; Drozdowicz, Krzysztof; Igielski, Andrzej; Kulińska, Agnieszka; Tracz, Grzegorz; Woźnicka, Urszula
    The report presents main assumptions on the design of the neutron pinhole camera dedicated to the PF-24 (Plasma Focus) device. The pinhole camera will be used for the investigation of the spatial and temporal distributions of DD neutrons from the PF-24 source. It makes use of principles of the optical geometry adopted for neutron imaging. In the report the evaluation of pinhole geometrical layout has been made on the basis of principles of the geometrical optics. A further optimization of the pinhole geometry has been carried out by means of neutron transport calculations (the MCNP code). The main aim of this report is to provide information on technical solutions for the neutron pinhole.
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    Linia eksperymentalna do napromieniania pojedynczych żywych komórek przy stanowisku mikrowiązki rentgenowskiej w IFJ PAN. Opis techniczny
    (Institute of Nuclear Physics Polish Academy of Sciences, 2011) Bożek, Sebastian; Bielecki, Jakub; Stachura, Zbigniew; Lekki, Janusz; Sienkiewicz, Michał; Świerblewski, Jacek; Pieprzyca, Tomasz; Szklarz, Zbigniew; Dutkiewicz, Erazm; Hrynkiewicz, Andrzej; Kwiatek, Wojciech M.
    X-ray experimental microbeam line for single live cells irradiation has been constructed at the Institute of Nuclear Physics PAN. The facility is based on an open type X-ray tube with microfocusing (the X-ray emission spot size is about 2 micrometers in diameter) and anode exchange ability. In the microdosimetry experiment a Titanium anode with the 4.5 keV energy of Ka characteristic radiation line is used. The X-ray radiation, emitted from the spot into a cone of 120 degrees angle, is focused on the sample using the X-ray focusing multilayer mirrors in the Montel geometry. The focusing distance is 32 mm, and the focal spot is about 20 micrometers in diameter. The beam image can be observed using the X-ray sensitive CCD camera, as well as with the use of an optical microscope and the P43 scintillator screen. Cells are seeded on a thin mylar foil, which is mounted on a drilled opening in the bottom of the Petri dish. After visual selection of cells dedicated to irradiate, and setting of experimental parameters, the irradiation process is carried out automatically, and cells are irradiated with a controlled X-ray dose.
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    Metoda mikrotomografii komputerowej dla układu mikrowiązki promieniowania X w zastosowaniu do wyznaczania porowatości i powierzchni właściwej skał
    (Institute of Nuclear Physics Polish Academy of Sciences, 2009) Bielecki, Jakub; Bożek, Sebastian; Lekki, Janusz; Stachura, Zbigniew; Jarzyna, Jadwiga; Kwiatek, Wojciech M.
    Celem pracy było opracowanie metodyki pomiarów wybranych własności fizycznych próbek geologicznych metodą mikrotomografii komputerowej. Badania zostały wykonane w Instytucie Fizyki Jądrowej PAN z wykorzystaniem układu mikrowiązki promieniowania X przy współpracy z Katedrą Geofizyki WGGiOŚ Akademii Górniczo-Hutniczej w Krakowie. Przedstawione zostały wstępne wyniki pomiarów porowatości i powierzchni właściwej przestrzeni porowych dla próbki skały piaskowca wydobytego z otworu CG5 na głębokości 2680 m. Omówiona została metoda segmentacji obrazów tomograficznych oraz algorytmy cyfrowej analizy danych tomograficznych. Praca przedstawia możliwości zastosowania metody mikrotomogarfii komputerowej o wysokiej przestrzennej zdolności rozdzielczej w połączeniu z metodami cyfrowej analizy danych do badania materiałów porowatych.
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    Multipurpose X-ray microprobe in the IFJ PAN. Technical description
    (Institute of Nuclear Physics Polish Academy of Sciences, 2009) Bielecki, Jakub; Bożek, Sebastian; Banaś, Agnieszka; Baszak, Jarosław; Doruch, Henryk; Hajduk, Roman; Kowalska, Joanna; Pieprzyca, Tomasz; Szklarz, Zbigniew; Lekki, Janusz; Stachura, Zbigniew; Kwiatek, Wojciech M.
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    Opracowanie algorytmów do analizy zdjęć z mikroskopii fluorescencyjnej
    (Institute of Nuclear Physics Polish Academy of Sciences, 2017-02) Tkocz, Konrad; Bożek, Sebastian; Bielecki, Jakub; Lekki, Janusz; Kwiatek, Wojciech M.
    The fluorescence microscopy is one of the fastest techniques of DNA damage visualisation induced by physical or chemical factors. For this reason, the area of algorithms for images analysis from fluorescence microscopy continually develops. This report contains presentation of algorithms elaborated for the assessment of relative amount of DNA damage, visualised with the fluorescent dyes Alexa Fluor 488 and DAPI. Methods of the determination of the noise level and signal to noise ratio in the images, as well as methods of noise reduction and image quality optimization have been presented.
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    Study of the mutual dependence between Lower Hybrid current drive and heavy impurity transport in tokamak plasmas. Part 1. Preparatory work and theoretical background
    (Institute of Nuclear Physics Polish Academy of Sciences, 2020) Jardin, Axel; Bielecki, Jakub; Król, Krzysztof; Peysson, Y.; Mazon, D.; Dworak, Dominik; Scholz, Marek
    This document reports the activities performed during the year 2019-2020 in the framework of the HARMONIA 10 project entitled “Study of the mutual dependence between Lower Hybrid current drive and heavy impurity transport in tokamak plasmas” as well as the preliminary results obtained during the first year of project execution. The project is founded by the Polish National Science Centre (NCN) and carried out in a close collaboration with the foreign partner - Institute for Magnetic Fusion Research (IRFM) of the French Alternative Energies and Atomic Energy Commission (CEA).