“大海捞针”：用于升级后nEXO实验的Ba标记方法
'Searching for a needle in a haystack;' A Ba-tagging approach for an upgraded nEXO experiment
AI总结：
本研究针对拟开展的nEXO无中微子双β衰变实验，提出可从5吨液态氙中提取识别单个Ba离子的Ba-tagging升级技术概念，可抑制本底提升探测灵敏度，并给出四极质谱仪子系统的初步调试结果。
摘要：
nEXO是一项拟开展的实验，将在5吨经同位素富集$^{136}$Xe的液态氙（LXe）中寻找无中微子双β衰变（0$νββ$）。目前正在研发一种名为Ba-tagging的技术，作为nEXO未来潜在的升级方案，用于探测$^{136}$Xe双β衰变的子同位素$^{136}$Ba。高效的Ba-tagging技术可从根本上抑制非双β衰变的本底事件，有望提升nEXO的0$νββ$探测灵敏度。本文提出了从5吨液态氙的探测器体积中提取、捕获并识别单个Ba离子的概念性方案，同时给出了其下属子系统之一——四极质谱仪的调试初步结果。
英文摘要：
nEXO is a proposed experiment that will search for neutrinoless double-beta decay (0$νββ$) in 5-tonnes of liquid xenon (LXe), isotopically enriched in $^{136}$Xe. A technique called Ba-tagging is being developed as a potential future upgrade for nEXO to detect the $^{136}$Xe double-beta decay daughter isotope, $^{136}$Ba. An efficient Ba-tagging technique has the potential to boost nEXO's 0$νββ$ sensitivity by essentially suppressing non-double-beta decay background events. A conceptual approach for the extraction from the detector volume, trapping, and identification of a single Ba ion from 5 tonnes of LXe is presented, along with initial results from the commissioning of one of its subsystems, a quadrupole mass filter.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
