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

S. Ban, M. Hirose, A. K. Ichikawa, Y. Iwashita, T. Kikawa, A. Minamino, K. Miuchi, T. Nakadaira, Y. Nakajima, K. D. Nakamura, K. Z. Nakamura, T. Nakaya, S. Obara, K. Sakashita, H. Sekiya, B. Sugashima, S. Tanaka, Kota Ueshima, M. Yoshida

Research output: Contribution to journalArticlepeer-review

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 ± 0.07% (FWHM) at 511 keV. The energy resolution at the 136Xe 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 0νββ signals from gamma-ray backgrounds.

Original languageEnglish
Article numberPTAA030
JournalProgress of Theoretical and Experimental Physics
Volume2020
Issue number3
DOIs
Publication statusPublished - 2020

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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