论文标题
使用SF $ _ {6} $ gas开发负离子Micro TPC检测器用于方向性暗物质搜索
Development of a Negative Ion Micro TPC Detector with SF$_{6}$ Gas for the Directional Dark Matter Search
论文作者
论文摘要
开发了负离子微型投影室（Ni $μ$ TPC），并研究了其性能。 Ni $μ$ TPC是一项新型技术，可实现自触发TPC的绝对$ z $坐标的测量。该技术提供了全面的分析，这是传统的气态TPC不可能的，并且对于在背景拒绝和角度分辨率的改进方面对定向暗物质搜索非常有用。开发的Ni $ $ TPC原型的检测量为12.8 $ \ times $ 25.6 $ \ times $ 144毫米$^{3} $。绝对$ z $坐标是使用SF $ _ {5}^{ - } $的少数载体的位置精度确定的。同时，三维（3D）轨道的空间分辨率为130 $μ\ rm {m} $。这是对3D跟踪的首次演示，并检测到绝对$ z $坐标，这是提高定向暗物质搜索敏感性的重要一步。
A negative ion micro time projection chamber (NI$μ$TPC) was developed and its performance studied. An NI$μ$TPC is a novel technology that enables the measurement of absolute $z$ coordinates for self-triggering TPCs. This technology provides full-fiducialization analysis, which is not possible with conventional gaseous TPCs, and is useful for directional dark matter searches in terms of background rejection and the improvement of the angular resolution. The developed NI$μ$TPC prototype had a detection volume of 12.8 $\times$ 25.6 $\times$ 144 mm$^{3}$. The absolute $z$ coordinate was determined with a location accuracy of 16 mm using minority carrieres of SF$_{5}^{-}$. Simultaneously, there was a successful reconstruction of the three-dimensional (3D) tracks with a spatial resolution of 130 $μ\rm{m}$. This is the first demonstration of 3D tracking with the detection of absolute $z$ coordinates, and it is an important step in improving the sensitivity of directional dark matter searches.
