论文标题
带有微米读数的气态时间投影室，用于低放射性材料筛选
A Gaseous Time Projection Chamber with Micromegas Readout for Low Radioactive Material Screening
论文作者
论文摘要
低放射性材料筛选对于罕见的事件搜索实验至关重要，例如中微子双β衰减和地下实验室中的暗物质搜索。气态时间投影室（TPC）可用于具有较大活性区域和高效率的此类目的。一个大约20 $ \ times $ 20 cm $^2 $的气态TPC成功地用于表面α污染测量值。我们已经表征了能量分辨率，增强稳定性以及通过校准来源跟踪能力。随着气态TPC的独特轨道背景抑制作用，我们已经确定TPC的Alpha背景速率为0.13 $ \ pm $ 0.03 $ $ $ $ $ $ $ bq/cm $^2 $，可与领先的商业解决方案相提并论。
Low radioactive material screening is becoming essential for rare event search experiments, such as neutrinoless double beta decay and dark matter searches in underground laboratories. A gaseous time projection chamber (TPC) can be used for such purposes with large active areas and high efficiency. A gaseous TPC with a Micromegas readout plane of approximately 20$\times$20 cm$^2$ is successfully constructed for surface alpha contamination measurements. We have characterized the energy resolution, gain stability, and tracking capability with calibration sources. With the unique track-related background suppression cuts of the gaseous TPC, we have established that the alpha background rate of the TPC is 0.13$\pm$0.03 $μ$Bq/cm$^2$, comparable to the leading commercial solutions.
