论文标题
减少$^{222} $ rn诱导的背景
Reduction of $^{222}$Rn-induced Backgrounds in a Hermetic Dual-Phase Xenon Time Projection Chamber
论文作者
论文摘要
$^{222} $ rn从检测器表面的连续散发导致当前液体氙时间投影室（TPCS）搜索暗物质的主要背景。下一代探测器需要大大减少，该检测器旨在到达中微子地板，例如达尔文。 $^{222} $ rn诱导的背部\ - 地面可以使用密封TPC减少，其中敏感的目标体积与含有大多数RN-eNATER表面的其余检测器分离。我们提出了一个密封的TPC，主要遵循领先的氙气TPC的完善设计，并在几周的时间内成功运营。通过扩展到达尔文级的结果，我们表明，即使体积不完善，也可以将$^{222} $ rn浓度降低到所需的水平。
The continuous emanation of $^{222}$Rn from detector surfaces causes the dominant background in current liquid xenon time projection chambers (TPCs) searching for dark matter. A significant reduction is required for the next generation of detectors which are aiming to reach the neutrino floor, such as DARWIN. $^{222}$Rn-induced back\-grounds can be reduced using a hermetic TPC, in which the sensitive target volume is mechanically separated from the rest of the detector containing the majority of Rn-emanating surfaces. We present a hermetic TPC that mainly follows the well-established design of leading xenon TPCs and has been operated successfully over a period of several weeks. By scaling up the results achieved to the DARWIN-scale, we show that the hermetic TPC concept can reduce the $^{222}$Rn concentration to the required level, even with imperfect separation of the volumes.
