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...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
The purpose of this research is to investigate the performace of a prototype detector for a neutrino telescope built in the Mediterranean Sea. The telescope consists of photomultiplier tubes which...Show moreThe purpose of this research is to investigate the performace of a prototype detector for a neutrino telescope built in the Mediterranean Sea. The telescope consists of photomultiplier tubes which record the position and time stamps of Cherenkov light created by charged particles form e.g. neutrino interactions. This investigation is done to find neutrino sources in the cosmos which could lead to a better understanding of active galactic nuclei, supernova remnants, micro-quasars and gammaray bursts. We used the data of a prototype where most of the signals stem from muons created in atmospheric interactions of cosmic rays. In the first part the properties of the detected signals are being investigated and we look for a lower limit to have a noise free signal when looking for Cherenkov light created by charged particles between multiple digital optical modules. The last part of this project is devoted to calibrating the observed data with the simulated data so that in future experiments it could be seen at which time a particle is detected with nanosecond precision and thus with an angular precision of a tenth of a degree the direction and path of particles could be constructed.Show less
