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Description
Since 2019, three scintillator-based cosmic ray telescopes, readout by SiPM and controlled by low-cost electronics, are installed in the scientific research site in Ny Ålesund (Svalbard) at 79°N, recording muons from secondary cosmic rays. The detectors are part of the EEE project, involving almost 100 secondary schools in Italy.
After collecting nearly 5 years of data, we were able to analyze the muon rate time series and observe an evident oscillating component with a period of about one year. Applying spectral techniques and sinusoidal fit optimization (Lomb-Scargle periodogram) we could quantify the annual component and verify its independence from environmental and experimental factors.
Finally, we compared the observed periodicity with open data provided by other muon experiments and by neutron counters from the NMDB network.
