First-principle event reconstruction by time-charge readouts for the Taishan Antineutrino Observatory
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866910914540732416 |
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| author | Liu, Xuewei Dou, Wei Xu, Benda Wang, Hanwen Cao, Guofu |
| author_facet | Liu, Xuewei Dou, Wei Xu, Benda Wang, Hanwen Cao, Guofu |
| contents | The Taishan Antineutrino Observatory (TAO) is a liquid-scintillator satellite experiment of the Jiangmen Underground Neutrino Observatory (JUNO) to measure the reference reactor neutrino spectrum with unprecented energy resolution. We use inhomogeous Poisson process and Tweedie generalized linear model (GLM) to characterize the detector response and the charge distribution of a SiPM. We develop a pure probabilistic model for time and charge of SiPMs from first principles to reconstruct point-like events in the TAO central detector. Thanks to our precise model and the high photo-coverage and quantum efficiency of the SiPM tiles at TAO, we achieve vertex position resolution better than 20mm, energy resolution of about 2% at 1MeV and <0.5% non-uniformity, marking the world's best performance of liquid scintillator detectors. With such resolution, we perceive MeV events to exhibit track effects. It opens up an exciting possibility of computed tracking calorimeter for unsegmented liquid scintillator detector like TAO. Our methodology is applicable to other experiments that utilize PMTs for time and charge readouts. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_01239 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | First-principle event reconstruction by time-charge readouts for the Taishan Antineutrino Observatory Liu, Xuewei Dou, Wei Xu, Benda Wang, Hanwen Cao, Guofu High Energy Physics - Experiment Instrumentation and Methods for Astrophysics Instrumentation and Detectors The Taishan Antineutrino Observatory (TAO) is a liquid-scintillator satellite experiment of the Jiangmen Underground Neutrino Observatory (JUNO) to measure the reference reactor neutrino spectrum with unprecented energy resolution. We use inhomogeous Poisson process and Tweedie generalized linear model (GLM) to characterize the detector response and the charge distribution of a SiPM. We develop a pure probabilistic model for time and charge of SiPMs from first principles to reconstruct point-like events in the TAO central detector. Thanks to our precise model and the high photo-coverage and quantum efficiency of the SiPM tiles at TAO, we achieve vertex position resolution better than 20mm, energy resolution of about 2% at 1MeV and <0.5% non-uniformity, marking the world's best performance of liquid scintillator detectors. With such resolution, we perceive MeV events to exhibit track effects. It opens up an exciting possibility of computed tracking calorimeter for unsegmented liquid scintillator detector like TAO. Our methodology is applicable to other experiments that utilize PMTs for time and charge readouts. |
| title | First-principle event reconstruction by time-charge readouts for the Taishan Antineutrino Observatory |
| topic | High Energy Physics - Experiment Instrumentation and Methods for Astrophysics Instrumentation and Detectors |
| url | https://arxiv.org/abs/2403.01239 |