论文标题
检测反应堆$ \ bar {ν_e} $的前景 - Ar连贯的弹性散射与较低的阈值双相氩气投影室在Taishan
Prospects of detecting the reactor $\bar{ν_e}$-Ar coherent elastic scattering with a low threshold dual-phase argon time projection chamber at Taishan
论文作者
论文摘要
我们建议使用具有200 kg基准质量的双相液体氩时间投影室（TPC）测量相干弹性中微子核（CE $ν$ ns）。预计该检测器将与Juno-Tao实验相邻，并在Taishan的4.6GW热功率的反应堆芯中约为35m。在此位置，抗神经通量约为6 $ \ times10^{12} $ cm $^{ - 1} $ s $^{ - 1} $在此位置，导致每天有11,000多个相干散射事件。然而，核后坐力的能量集中在亚基区区域，对应于液体氩气中的十个电离电子。由于气体区域的大量扩增，可以在双相TPC中检测几个电离电子。具有四个电离电子的可行检测阈值，信号速率为每天955。该探测器的设计旨在从宇宙基础背景和环境放射性范围内很好地屏蔽，以达到感兴趣的能量区域的16％背景信号比率。使用大CE $ν$ ns样本，讨论了测量弱混合角$ \ sin^{2}θ_{w} $的预期灵敏度，并讨论了限制中微子磁矩的灵敏度。此外，预见了反应堆抗神经CE $ν$ ns实验与暗物质实验之间的协同作用。
We propose to measure the coherent elastic neutrino nucleus scattering (CE$ν$NS) using a dual-phase liquid argon time projection chamber (TPC) with 200kg fiducial mass. The detector is expected to be adjacent to the JUNO-TAO experiment and to be about 35m from a reactor core with 4.6GW thermal power at Taishan. The antineutrino flux is approximately 6$\times10^{12}$cm$^{-1}$s$^{-1}$ at this location, leading to more than 11,000 coherent scattering events per day in the fiducial mass. However, the nuclear recoil energies concentrate in the sub-keV region, corresponding to less than ten ionisation electrons in the liquid argon. The detection of several ionisation electrons can be achieved in the dual-phase TPC due to the large amplification in the gas region. With a feasible detection threshold of four ionisation electrons, the signal rate is 955 per day. The detector is designed to be shielded well from cosmogenic backgrounds and ambient radioactivities to reach a 16% background-to-signal ratio in the energy region of interest. With the large CE$ν$NS sample, the expected sensitivity of measuring the weak mixing angle $\sin^{2}θ_{W}$, and of limiting the neutrino magnetic moment are discussed. In addition, a synergy between the reactor antineutrino CE$ν$NS experiment and the dark matter experiment is foreseen.
