In situ calibration of the KM3NeT/ARCA neutrino telescope using atmospheric muons

KM3NeT is an international collaboration currently working on the construction of a neutrino detector in the Mediterranean Sea. During the period evaluated in this research, two detection strings were deployed and active. With this new detector, the KM3NeT collaboration aims to discover the neutrino mass ordering and scan for cosmic neutrino sources. In order to accurately reconstruct neutrino interactions, the detector elements must be synchronized within nanoseconds. The goal of this research is to evaluate whether the signal of passing atmospheric muons can contribute in the time calibration. The data was scrutinized for detector malfunctions and cleaned. The detector performance was then checked by using signal coincidences between detector elements to evaluate correlated signals, stemming from atmospheric muons. This allowed also to determine the dependence of the muon rate on the depth and assess potential time o sets. A time offset of 30 ns between the two operating detector...Show moreKM3NeT is an international collaboration currently working on the construction of a neutrino detector in the Mediterranean Sea. During the period evaluated in this research, two detection strings were deployed and active. With this new detector, the KM3NeT collaboration aims to discover the neutrino mass ordering and scan for cosmic neutrino sources. In order to accurately reconstruct neutrino interactions, the detector elements must be synchronized within nanoseconds. The goal of this research is to evaluate whether the signal of passing atmospheric muons can contribute in the time calibration. The data was scrutinized for detector malfunctions and cleaned. The detector performance was then checked by using signal coincidences between detector elements to evaluate correlated signals, stemming from atmospheric muons. This allowed also to determine the dependence of the muon rate on the depth and assess potential time o sets. A time offset of 30 ns between the two operating detector strings was found, which will require further investigations.Show less

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In situ calibration of the KM3NeT/ARCA neutrino telescope using atmospheric muons