Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English   Periodicity: 4 times per year   Open access peer reviewed journal

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R. B. Podviyanuk¹, Pia Loaiza², V. N. Kovalenko<sup>3

1</sup>Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
²Modane Underground Laboratory, Modane, France
³OJTC "Electrotechnical plant", Kyiv, Ukraine

Abstract: One of the most sensitive experiment in search for weakly interacting massive particles (WIMP) of dark matter (EDELWEISS) is carried out in the Modane underground laboratory (France). Germanium crystals cooled up to ultra low temperature are used in the experiment. Simultaneous registration of ionizing and thermal signals allows to distinguish events from recoil nucleus, which can appear as a result of interaction of WIMP particles with matter, from gamma and beta background. Data acquisition system based on 10 MHz digitizer to discriminate signals detection from acoustic noises was developed. The system allows transferring digitally processed pulse into computer, to visualize it, and create energy spectra. Tests with ⁶⁰Co and ¹⁵²Eu gamma sources have shown effectiveness of the applied approach.

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