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- Title
Design and performance of a high-pressure xenon gas TPC as a prototype for a large-scale neutrinoless double-beta decay search.
- Authors
Ban, S; Hirose, M; Ichikawa, A K; Iwashita, Y; Kikawa, T; Minamino, A; Miuchi, K; Nakadaira, T; Nakajima, Y; Nakamura, K D; Nakamura, K Z; Nakaya, T; Obara, S; Sakashita, K; Sekiya, H; Sugashima, B; Tanaka, S; Ueshima, K; Yoshida, M
- Abstract
A high-pressure xenon gas time projection chamber, with a unique cellular readout structure based on electroluminescence, has been developed for a large-scale neutrinoless double-beta decay search. In order to evaluate the detector performance and validate its design, a 180 L size prototype is being constructed and its commissioning with partial detector has been performed. The obtained energy resolution at 4.0 bar is 1.73 |$\pm$| 0.07% (FWHM) at 511 keV. The energy resolution at the |$^{136}$| Xe neutrinoless double-beta decay |$Q$| -value is estimated to be between 0.79 and 1.52% (FWHM) by extrapolation. Reconstructed event topologies show patterns peculiar to the track endpoint that can be used to distinguish |$0\nu\beta\beta$| signals from gamma-ray backgrounds.
- Subjects
XENON; NEUTRINOLESS double beta decay; ELECTROLUMINESCENCE; GAMMA rays; EXTRAPOLATION
- Publication
Progress of Theoretical & Experimental Physics: PTEP, 2020, Vol 2020, Issue 3, pN.PAG
- ISSN
2050-3911
- Publication type
Article
- DOI
10.1093/ptep/ptaa030