论文标题
多吨氙气检测器的液相纯化
Liquid-phase purification for multi-tonne xenon detectors
论文作者
论文摘要
随着液体氙气探测器的规模生长，需要新的技术来保持足够的纯度以使电荷在更长的漂移中生存。哥伦比亚大学的Xeclipse测试设施是为了通过液体氙气泵提供动力的低温过滤来测试电负性杂质的去除，从而使质量流速远高于通过加热的ge剂纯化的质量流量。在本文中，我们介绍了Xeclipse的结果，包括两种吸附剂材料的测得的氧气去除率，这些材料用于指导Xenonnt液体纯化系统的设计和调试。得益于这一创新，Xenonnt在总质量8.6吨中实现了超过10 ms的电子寿命，这也许是液体氙气检测器中有史以来最高的纯度。
As liquid xenon detectors grow in scale, novel techniques are required to maintain sufficient purity for charges to survive across longer drifts. The Xeclipse test facility at Columbia University was built to test the removal of electronegative impurities through cryogenic filtration powered by a liquid xenon pump, enabling a far higher mass flow rate than gas-phase purification through heated getters. In this paper, we present results from Xeclipse, including measured oxygen removal rates for two sorbent materials, which were used to guide the design and commissioning of the XENONnT liquid purification system. Thanks to this innovation, XENONnT has achieved an electron lifetime greater than 10 ms in an 8.6 tonne total mass, perhaps the highest purity ever measured in a liquid xenon detector.
