This title appears in the Scientific Report :
2019
Please use the identifier:
http://hdl.handle.net/2128/25136 in citations.
Study on the Trigger Configuration for the JUNO experiment
Study on the Trigger Configuration for the JUNO experiment
JUNO (Jiangmen Underground Neutrino Observatory) is a 20 kton multiple purpose liquidscintillator detector under construction in Kaiping, China. The chief goal of JUNO is thedetermination of the neutrino mass hierarchy, the prime question facing neutrino physics.The other aims of JUNO include precis...
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Personal Name(s): | Shah, Rikhav (Corresponding author) |
---|---|
Contributing Institute: |
Experimentelle Hadrondynamik; IKP-2 |
Imprint: |
2018
|
Physical Description: |
75 |
Dissertation Note: |
Masterarbeit, RWTH Aachen, 2018 |
Document Type: |
Master Thesis |
Research Program: |
Cosmic Matter in the Laboratory |
Link: |
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Publikationsportal JuSER |
JUNO (Jiangmen Underground Neutrino Observatory) is a 20 kton multiple purpose liquidscintillator detector under construction in Kaiping, China. The chief goal of JUNO is thedetermination of the neutrino mass hierarchy, the prime question facing neutrino physics.The other aims of JUNO include precision measurements of neutrino oscillations parametersfrom the solar, astrophysical and atmospheric neutrinos. For this, JUNO is designed to havean energy resolution of 3%/√MeV, provided by ∼18, 000 photomultiplier tubes (PMTs) surrounding the 34 m diameter spherical vessel. JUNO will observe ∼83 antineutrino interactions per day, with antineutrinos originating from the nearby Yangjiang and Taishan fissionreactors. Within 6 years of data-taking, this is expected to lead to a 3 − 4σ sensitivity on theneutrino mass hierarchy.The study of the trigger configuration is undertaken to optimize a resulting trigger condition. The goal of this thesis is the minimization the effects of the dark noise from the PMTson low-energy events. This is carried out by parameterizing the detector with respect to twocharacteristic features: the event location and the trigger decision window (trigger window)for the PMT setup. The optimum trigger settings can then be obtained from the thresholdenergies and trigger efficiency. The radioactive decays of unstable nuclei like 210Po, 238U, etc.in the liquid scintillator lead to large, non-negligible backgrounds in JUNO. The data acquisition system in JUNO is required to cope with these contaminants, which are investigatedfor their influence on the trigger rate. Solar neutrinos are also investigated similarly, withneutrinos originating in pp and 7Be decays in the Sun. |