Dissertation/ Thesis
3D Topological Reconstruction in JUNO applied to GeV events ; 3D Topologische Rekonstruktion in JUNO angewendet auf GeV-Events
| العنوان: | 3D Topological Reconstruction in JUNO applied to GeV events ; 3D Topologische Rekonstruktion in JUNO angewendet auf GeV-Events |
|---|---|
| المؤلفون: | Meyhöfer, David Johannes |
| المساهمون: | Hagner, Caren, Wonsak, Björn |
| بيانات النشر: | Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky |
| سنة النشر: | 2020 |
| المجموعة: | E-Dissertationen der Universität Hamburg |
| مصطلحات موضوعية: | JUNO, reconstruction, scintillator, neutrino, cosmogenic, track, topological, muon, quadratic, 530: Physik, 33.56: Elementarteilchenphysik, Kosmogenes Radionuklid, Rekonstruktion, Simulation, Szintillator, Photon, Myon, ddc:530 |
| الوصف: | In recent years unsegmented liquid scintillator detectors have demonstrated to be an excellent tool for neutrino physics. Typically, these detector types investigate low energy neutrino interactions, in the MeV range. An example for this is the Jiangmen Underground Neutrino Observatory (JUNO) detector, which is currently under construction and will start taking data in 2021. It will be filled with 20 kt liquid scintillator and measure reactor electron anti neutrinos from two nuclear power plants that each are ∼53 km away from the detector. Their signal is of importance for the determination of the neutrino mass ordering. Additionally, JUNO will determine the solar oscillation parameters θ-12 and ∆m^2-21 with unprecedented precision. To achieve this an excellent energy resolution and an effective background reduction is of the essence. A main background are the isotope Li-9 and He-8, which are constantly generated during showering muon events. Therefore, an accurate muon reconstruction and the determination of energy deposition along muon tracks is essential. During this thesis, a cosmogenic simulation was developed to evaluate the impact of more rigorous muon veto strategies. With it the spatial distribution of the isotopes Li-9 and He-8 was explored. By testing different veto approaches which do assume shower detectability, it could be determined that up to 12.8 % more total active volume is deemed to be reachable for JUNO. This prompts the development of reconstruction methods that can determine shower positions. The Topological Track Reconstruction (TTR) is one approach that has been further developed as part of this work. It has the option of determining shower positions along muon tracks, but is not fast enough to be used during live measurement. Hence, a second topological reconstruction approach was developed. The Quadratic Reconstruction (QR) uses a similar concept as the TTR, but is much faster, because it is only executed along a muon track instead of the whole detector. With this, it is possible to ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | English |
| Relation: | http://nbn-resolving.de/urn:nbn:de:gbv:18-ediss-93047; https://ediss.sub.uni-hamburg.de/handle/ediss/9037 |
| الاتاحة: | http://nbn-resolving.de/urn:nbn:de:gbv:18-ediss-93047 https://ediss.sub.uni-hamburg.de/handle/ediss/9037 |
| Rights: | http://purl.org/coar/access_right/c_abf2 ; info:eu-repo/semantics/openAccess ; https://creativecommons.org/licenses/by/4.0/ |
| رقم الانضمام: | edsbas.A074A6B9 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |