The DANSS detector is located under a commercial reactor core at the Kalinin Nuclear Power Plant. DANSS position below industrial reactor core provides overburden about 50 m. w. e. in vertical direction. So in terms of cosmic rays it occupies an intermediate position between surface and underground detectors. The core of the detector is a cubic meter of plastic scintillator with fine segmentation and combined PMT and SiPM readout, surrounded by multilayer passive and active shielding. Detector can reconstruct muon tracks passing its sensitive volume. The detector is placed on a lifting platform and the data is taken in three positions - 10.9, 11.9 and 12.9 meters from the core. The overburden parameter <Ethrcosθ>, the averaged multiple of the zenith angle cosine and of the corresponding threshold energy, is evaluated for up, middle and down positions of the detector. Muon data were collected for more than two years. Correlation coefficients α and β between the relative variation of the muon rate and the relative variations of the effective atmospheric temperature and of the surface pressure, are calculated for each detector position.
The work is supported by RSF grant 17-12-01145П