Design and performance of a high-pressure xenon gas TPC as a prototype for a large-scale neutrinoless double-beta decay search

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...

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Bibliographic Details
Published in:Progress of theoretical and experimental physics 2020-03, Vol.2020 (3)
Main 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
Format: Article
Language:English
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Summary: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.
ISSN:2050-3911
2050-3911
DOI:10.1093/ptep/ptaa030