利用大亚湾反中微子探测器优化 JUNO 液体闪烁体组分
仪器与探测器
2020-07-02 v1 高能物理 - 实验
摘要
为使江门地下中微子观测站（JUNO）液体闪烁体（LS）的光产额最大化，在大亚湾的中试工厂生产了 20 吨 LS 样品。通过替换一台反中微子探测器中的载钆 LS，研究了不同组分下新 LS 的光学性质。荧光剂 PPO 和波长移位剂 bis-MSB 的浓度在 12 个步骤中分别从 0.5 g/L 和 <0.01 mg/L 增加至 4 g/L 和 13 mg/L。探测到的总光电子数表明，在使用光学纯化溶剂时，bis-MSB 浓度无需超过 4 mg/L。为弥合大亚湾与 JUNO 之间探测器尺寸相差一个数量级的差异，利用大亚湾数据对新开发的光学模型参数进行调谐。随后，该模型与调谐参数被用于 JUNO 模拟。由此确定了 JUNO LS 的最优组分：纯化溶剂 LAB 加 2.5 g/L PPO，以及 1 至 4 mg/L bis-MSB。
引用
@article{arxiv.2007.00314,
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journal= {arXiv preprint arXiv:2007.00314},
year = {2020}
}
备注
13 pages, 8 figures