Since 2019, three scintillator-based cosmic ray detectors, 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, a joint project of Centrofermi and INFN, involving almost 100 secondary schools in Italy. After collecting nearly 5 years of data, we were able to analyse the muon rate time series and observe an evident oscillating component with a period of about one year. Applying the Lomb-Scargle periodogram technique, based on sinusoidal fit optimization, we could quantify the annual component, after verifying its independence from environmental and experimental factors.
Annual quasiperiodicity in muon rate observed by PolarquEEEst detectors at 79°N
De Gruttola, D.;De Pasquale, S.;Ripoli, C.;
2025
Abstract
Since 2019, three scintillator-based cosmic ray detectors, 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, a joint project of Centrofermi and INFN, involving almost 100 secondary schools in Italy. After collecting nearly 5 years of data, we were able to analyse the muon rate time series and observe an evident oscillating component with a period of about one year. Applying the Lomb-Scargle periodogram technique, based on sinusoidal fit optimization, we could quantify the annual component, after verifying its independence from environmental and experimental factors.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
