PandaX-III: Searching for neutrinoless double beta decay with high pressure 136Xe gas time projection chambers
PandaX-III: Searching for neutrinoless double beta decay with high pressure 136Xe gas time projection chambers
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DOI：
10.1007/s11433-017-9028-0
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发表时间：
2017-06-01
影响因子：
6.4
通讯作者：
Yan, Yu-Peng
中科院分区：
文献类型：
--
作者：
Chen, Xun;Fu, ChangBo;Yan, Yu-Peng
自中微子振荡实验发现中微子质量以来，寻找无中微子双β衰变（NLDBD）被认为是探索中微子本质的最有前途的技术。PandaX-III（粒子和天体物理学氙实验III）将在中国金平地下实验室（CJPL）搜索NLDBD的<$-136。在实验的第一阶段，高压气体时间投影室（TPC）将包含200千克、90%的在10巴下操作的浓缩的Xe-136气体。TPC两端将使用细间距微图案气体检测器（Microbulk Micromegas），用于电荷读出，中间有一个阴极。电荷信号可用于重建NLDBD事件的电子轨迹，并提供良好的能量和空间分辨率。探测器将浸入大型水箱中，以确保在所有方向上都有类似于5 m的水屏蔽。第二阶段是吨级实验，将在同一水箱中使用五个TPC，提高能量分辨率，更好地控制背景。
Searching for the neutrinoless double beta decay (NLDBD) is now regarded as the topmost promising technique to explore the nature of neutrinos after the discovery of neutrino masses in oscillation experiments. PandaX-III (particle and astrophysical xenon experiment III) will search for the NLDBD of Xe-136 at the China Jin Ping Underground Laboratory (CJPL). In the first phase of the experiment, a high pressure gas Time Projection Chamber (TPC) will contain 200 kg, 90% Xe-136 enriched gas operated at 10 bar. Fine pitch micro-pattern gas detector (Microbulk Micromegas) will be used at both ends of the TPC for the charge readout with a cathode in the middle. Charge signals can be used to reconstruct the electron tracks of the NLDBD events and provide good energy and spatial resolution. The detector will be immersed in a large water tank to ensure similar to 5 m of water shielding in all directions. The second phase, a ton-scale experiment, will consist of five TPCs in the same water tank, with improved energy resolution and better control over backgrounds.