MSc thesis defense by Sofus Stray

Title: In-situ relative efficiency calibration of digital optical modules in the IceCube detector


The IceCube Neutrino Observatory is a kilometer-scale detector located at the South Pole. The digital optical modules (DOMs) that form the detector contain photomultiplier tubes whose quantum efficiency when frozen in the ice is not yet fully understood. This thesis uses the Cherenkov light produced by minimum ionizing atmospheric muons to characterize this efficiency through Monte Carlo simulation datasets. Additionally, it presents new machine-learning methods to classify stopped muons in the detector as an approximation to minimum ionizing muons.

Please notice that the MSc thesis defense will take place virtually via Zoom. To receive a link to join the MSc thesis defense, please send an e-mail in advance to Jason Koskinen: