论文标题
高压氙气TPC的设计和性能作为大规模中微子双β衰变搜索的原型
Design and performance of a high-pressure xenon gas TPC as a prototype for a large-scale neutrinoless double-beta decay search
论文作者
论文摘要
为大规模中微子双β衰减搜索，已经开发了具有基于电致发光的独特蜂窝读数结构的高压氙气时间投影室。为了评估检测器性能并验证其设计，正在构建180 〜L大小的原型，并进行了部分检测器的调试。在4.0〜 bar处获得的能量分辨率为1.73 $ \ pm $ 0.07％（FWHM）511 KEV。 $^{136} $ XE中微子双β衰减Q值的能量分辨率估计在0.79％至1.52％（FWHM）之间。重建的事件拓扑显示了跟踪终点特有的模式，该模式可用于区分$0νβ$信号与伽马射线背景。
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 track end-point which can be used to distinguish $0νββ$ signals from gamma-ray backgrounds.
