Design and performance of a high-pressure xenon gas TPC as a prototype for a large-scale neutrinoless double-beta decay search
Design and performance of a high-pressure xenon gas TPC as a prototype for a large-scale neutrinoless double-beta decay search
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DOI：
10.1093/ptep/ptaa030
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发表时间：
2020-01
影响因子：
3.5
通讯作者：
S. Ban;M. Hirose;A. Ichikawa;Y. Iwashita;T. Kikawa;A. Minamino;K. Miuchi;T. Nakadaira;Y. Nakajima;Y. Nakajima;K. Nakamura;K. Nakamura;T. Nakaya;Shuhei Obara;Shuhei Obara;K. Sakashita;H. Sekiya;H. Sekiya;B. Sugashima;S. Tanaka;K. Ueshima;M. Yoshida
中科院分区：
文献类型：
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作者：
S. Ban;M. Hirose;A. Ichikawa;Y. Iwashita;T. Kikawa;A. Minamino;K. Miuchi;T. Nakadaira;Y. Nakajima;Y. Nakajima;K. Nakamura;K. Nakamura;T. Nakaya;Shuhei Obara;Shuhei Obara;K. Sakashita;H. Sekiya;H. Sekiya;B. Sugashima;S. Tanaka;K. Ueshima;M. Yoshida
研制了一种基于电致发光的高压氙气时间投影室，该室具有独特的细胞读出结构，可用于大规模的中微子双β衰变搜索。为了评估探测器的性能并验证其设计，一个180 L尺寸的原型正在建造中，并与部分探测器进行了调试。在4.0 bar处获得的能量分辨率为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.
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.