The mDOM – a multi-PMT digital optical module for the IceCube-Gen2 neutrino telescope
Inspired by the discovery of a comogenic high-energy neutrino flux in IceCube, plans are under way for the construction of new neutrino observatory at the South pole. This next-generation neutrino telescope, IceCube-Gen2, will expand the sensitivity range to lower as well as towards higher neutrino...
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| Format: | Doctoral or Postdoctoral Thesis |
| Language: | English |
| Published: |
2017
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| Online Access: | https://opus4.kobv.de/opus4-fau/frontdoor/index/index/docId/8678 https://nbn-resolving.org/urn:nbn:de:bvb:29-opus4-86782 https://opus4.kobv.de/opus4-fau/files/8678/document_Classen.pdf |
| Summary: | Inspired by the discovery of a comogenic high-energy neutrino flux in IceCube, plans are under way for the construction of new neutrino observatory at the South pole. This next-generation neutrino telescope, IceCube-Gen2, will expand the sensitivity range to lower as well as towards higher neutrino energies with respect to the currently operating IceCube detector. While the compact and densely instrumented low-energy component will, amongst other questions, address neutrino mass hierarchy, the large-volume high-energy array primarily aims at the first detection of neutrino point sources. A substantial increase of detector sensitivity is expected from the employment of novel optical sensors. One of the most auspicious of the new designs is based on the multi-PMT concept first introduced in the KM3NeT detector. As indicated by its name, a multi-PMT optical module houses, inside a transparent pressure vessel, an array of small-size PMTs. The effective segmentation of the sensitive area entails some attractive advantages compared to the conventional layout featuring a single large-area PMT. Most prominent among those advantages are an increased effective area uniformly covering the solid angle, an extended dynamic range, as well as intrinsic directional sensitivity of the module. Within the scope of this thesis, the development of a dedicated multi-PMT Digital Optical Module for IceCube-Gen2 has been advanced from the original ideas to a stage where the realization of a first fully featured and working prototype is expected within a year. The reported work includes testing and detailed characterization of key hardware components, simulation studies concerning pressure stability and performance capabilities, as well as first steps towards the construction of a prototype of the novel module. Nach der erstmaligen Messung eines hochenergetischen astrophysikalischen Neutrinoflusses durch IceCube, wird momentan intensiv an den Planungen zur nächsten Generation eines Neutrino-Observatoriums am Südpol, IceCube-Gen2, ... |
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