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

被引:2
|
作者
Ban, S. [1 ]
Hirose, M. [1 ]
Ichikawa, A. K. [1 ]
Iwashita, Y. [2 ]
Kikawa, T. [1 ]
Minamino, A. [3 ]
Miuchi, K. [4 ]
Nakadaira, T. [5 ]
Nakajima, Y. [6 ,7 ]
Nakamura, K. D. [4 ]
Nakamura, K. Z. [1 ]
Nakaya, T. [1 ]
Obara, S. [1 ,9 ]
Sakashita, K. [5 ]
Sekiya, H. [6 ,7 ]
Sugashima, B. [1 ]
Tanaka, S. [1 ]
Ueshima, K. [8 ]
Yoshida, M. [1 ]
机构
[1] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan
[2] Kyoto Univ, Adv Res Ctr Beam Sci, Kyoto 6110011, Japan
[3] Yokohama Natl Univ, Fac Engn, Yokohama, Kanagawa 2408501, Japan
[4] Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan
[5] High Energy Accelerator Org KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 3050801, Japan
[6] Univ Tokyo, Inst Cosm Ray Res, Kamioka Observ, Hida 5061205, Japan
[7] Univ Tokyo, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778568, Japan
[8] Tohoku Univ, Res Ctr Neutrino Sci, Sendai, Miyagi 9808578, Japan
[9] Tohoku Univ, Frontier Res Inst Interdisciplinary Sci, Sendai, Miyagi 9808578, Japan
来源
基金
日本学术振兴会;
关键词
D O I
10.1093/ptep/ptaa030
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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 Xe-136 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 0v beta beta signals from gamma-ray backgrounds.
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页数:20
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