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Currently, the final stage of the ground tests for the technological detector of the high-energy gamma-ray telescope (GRT) GAMMA-400 are finished. The new space GRT will accept the gamma-rays with energy more than 400 MeV and is aimed to open our eyes for so-called “dark matter” problem in the Universe. The high-speed scintillation detectors system (SDS) is used one of the main GRT particle detectors...
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