论文标题
液体氩探测器的多功能低温系统
A versatile cryogenic system for liquid argon detectors
论文作者
论文摘要
用于使用液相的贵重气体进行直接暗物质搜索的检测器，作为检测培养基需要与液化，纯化和再循环系统耦合。专用的低温系统已在Infn-Naples低温实验室组装和操作，目的是液化和净化用作液体氩检测器中用作活性靶标的氩气，以研究大型SIPMS阵列检测到的闪烁和电离信号。低温系统主要由托有探测器的双层壁冷冻仪组成，这是将杂质降低到十亿级以下的纯化阶段，一种液化的冷凝器，液化氩气，氩气，一个连接到配有自定义气泵的低温恒温器的再循环燃气面板。报道了低温系统的主要特征以及最相关的热力学参数方面的性能，长期操作和稳定性。
Detectors for direct dark matter search using noble gases in liquid phase as detection medium need to be coupled to liquefaction, purification and recirculation systems. A dedicated cryogenic system has been assembled and operated at the INFN-Naples cryogenic laboratory with the aim to liquefy and purify the argon used as active target in liquid argon detectors to study the scintillation and ionization signals detected by large SiPMs arrays. The cryogenic system is mainly composed of a double wall cryostat hosting the detector, a purification stage to reduce the impurities below one part per billion level, a condenser to liquefy the argon, a recirculation gas panel connected to the cryostat equipped with a custom gas pump. The main features of the cryogenic system are reported as well as the performances, long term operations and stability in terms of the most relevant thermodynamic parameters.
