Results of a directional dark matter search from the NEWAGE experiment
Results of a directional dark matter search from the NEWAGE experiment
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NEWAGE 实验定向暗物质搜索的结果
DOI：
10.1088/1742-6596/1468/1/012042
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Nakamura K.
中科院分区：
文献类型：
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作者：
Ikeda T.;Miuchi K.;Hashimoto T.;Ishiura H.;Nakamura T.;Shimada T.;Nakamura K.
在这项研究中，我们展示了NEWAGE实验中定向暗物质搜索的结果。研制了一种低本底气体探测器，即低α射线发射μ-PIC（LA μ-PIC）。LA μ-PIC安装在神冈天文台，NEWAGE-0.3”探测器（探测体积为37 L）于2018年6月至11月运行。获得的总暴露量为1.1 kg·d，与以前的结果相比，本底降低了30倍。使用Monte Carlo模拟研究其余背景。在50≤ E≤ 100 keV能量范围内，主要的本底是从LA μ-PIC表面发射的α射线。
In this study we present the results of a directional dark matter search from the NEWAGE experiment. A low-background gaseous detector, namely a low alpha-ray emitting μ-PIC (LA μ-PIC), was developed. The LA μ-PIC was installed in Kamioka Observatory and the NEWAGE-0.3" detector with a detection volume of 37 L was operated from June to November 2018. A total exposure of 1.1 kg· days was obtained and a reduction of background by 30 times comparing with a previous result was confirmed. The remaining backgrounds were studied using a Monte Carlo simulation. The main background in the energy region of 50≤ E≤ 100 keV was found to be alpha-rays emitted from the surface of the LA μ-PIC.