Schneider J (2024)
Publication Language: English
Publication Type: Thesis
Publication year: 2024
The IceCube Neutrino Observatory (IceCube) is a cubic-kilometer neutrino detector built in the glacier ice at the South Pole. In the near future, IceCube will be extended by the IceCube Upgrade, which is the low energy extension of IceCube. This thesis focuses on characterization measurements of different system components of the multi-PMT Digital Optical Module (mDOM) for the IceCube Upgrade. The mDOM is a novel optical module using 24 small photomultiplier tubes (PMTs) instead of one large PMT. Most measurements were performed during the development stage of the mDOM before the first module was built. The following components were characterized in more detail: PMTs, analog front end (AFE), and an integrated mDOM. Different PMT types of two manufacturers were investigated during mass tests of about 150 PMTs. Based on the results of this thesis, the PMT type to be used for the mDOM was chosen, thus guaranteeing excellent directional and energy resolution of the IceCube Upgrade. Furthermore, a dedicated setup as well as measurement and analysis techniques were developed to investigate different AFE designs. In close cooperation with the electronics engineer, an AFE design was finally developed which not only enables to trigger on single photons, but also covers the relevant energy range for neutrino detection in the IceCube Upgrade. This design was used for the revision 1 mainboard of the first mDOMs. Lastly, the first two integrated mDOMs were characterized. For the first time, an mDOM was tested at temperatures expected during detector operation. It was shown that the cooling of the mDOM works sufficiently and the mDOM works as expected. In conclusion, this thesis contributed to developing and building working mDOMs which meet the requirements for the application in the IceCube Upgrade.
APA:
Schneider, J. (2024). Characterization of the mDOM light detection and signal processing system for the IceCube Upgrade (Dissertation).
MLA:
Schneider, Judith. Characterization of the mDOM light detection and signal processing system for the IceCube Upgrade. Dissertation, 2024.
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