The project in a nutshell:
LACTEL (LAC TELescope) will detect cosmic ray particles from the Milky Way Galaxy. Cosmic rays penetrating the Earth atmosphere produce “showers” of secondary high-energy particles that can reach the lake surface and produce blue Cherenkov light flashes lasting a fraction of a microsecond. LACTEL will use very sensitive photomultiplier tube light sensors enclosed in light-tight compartments (see figure) to detect such Cherenkov light flashes produced by the shower electrons, positrons and muons.
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