论文标题
质量生产超纯NAI粉末的设施用于余弦 - 200实验
A facility for mass production of ultra-pure NaI powder for the COSINE-200 experiment
论文作者
论文摘要
Cosine-200是正在进行的Cosine-100实验的下一阶段。实验的主要目的是对Dama实验观察到的年度调制信号的明确验证。实验的成功在很大程度上取决于产生200 kg的超纯NAI（TL）晶体检测器，其背景低于Dama晶体。原粉的纯化是迈向产生超纯NAI（TL）检测器的初始但重要步骤。我们已经证明，水溶液中的分数重结晶是去除有问题的K和PB元素的有效方法。对于纯化粉末的大规模生产，韩国基础科学研究所（IBS）建造了分数重结晶的清洁设施。在这里，我们报告了NAI粉末净化设施的纯化过程，材料恢复和性能的设计。
COSINE-200 is the next phase of the ongoing COSINE-100 experiment. The main purpose of the experiment is the performance of an unambiguous verification of the annual modulation signals observed by the DAMA experiment. The success of the experiment critically depends on the production of a 200 kg array of ultra-pure NaI(Tl) crystal detectors that have lower backgrounds than the DAMA crystals. The purification of raw powder is the initial but important step toward the production of ultra-pure NaI(Tl) detectors. We have already demonstrated that fractional recrystallization from water solutions is an effective method for the removal of the problematic K and Pb elements. For the mass production of purified powder, a clean facility for the fractional recrystallization had been constructed at the Institute for Basic Science (IBS), Korea. Here, we report the design of the purification process, material recovery, and performance of the NaI powder purification facility.
