论文标题
低放射性地下氩气的设施
A Facility for Low-Radioactivity Underground Argon
论文作者
论文摘要
Darkside-50实验证明了从深地下来源提取和净化氩气的能力，并表明$^{39} $ ar的浓度是从源自大气中的氩气中发现的水平大大降低的。这一发现扩大了基于氩的探测器的物理覆盖范围，并在高能物理，核物理学以及环境和盟友科学中对低放射性地下氩（UAR）产生了需求。全球氩暗物质合作（GADMC）正准备为Darkside-20k生产UAR，但不存在为社区提供的一般UAR供应。有了适当的资源，这些植物可以作为在Darkside 20k生产后的大多数实验提供UAR的设施。但是，如果当前源变得不可用，或者质量大于需要当前源可用的源，则必须找到一个新的来源。要找到一个新来源，将需要了解燃气场中地下放射性氩同位素的产生，以及测量$^{37} $ ar，$^{39} $ ar和$^{42} $ ar到超低级别的能力。设施的操作需要辅助系统来监视$^{37} $ ar，$^{39} $ ar，或$^{42} $直接或间接地渗透，也可以用来审查$^{37} $ ar，$^ar，$^{39} $ afor的范围，n everial of stalite a n portive a revirene n revelies in loke in loke in a n evore in A级$ ar and a。将UAR与矩阵井气体分开。寻找与行业合作的方法，以找到富含UAR或商业化UAR设施的燃气流是非常可取的。
The DarkSide-50 experiment demonstrated the ability to extract and purify argon from deep underground sources and showed that the concentration of $^{39}$Ar in that argon was greatly reduced from the level found in argon derived from the atmosphere. That discovery broadened the physics reach of argon-based detector and created a demand for low-radioactivity underground argon (UAr) in high-energy physics, nuclear physics, and in environmental and allied sciences. The Global Argon Dark Matter Collaboration (GADMC) is preparing to produce UAr for DarkSide-20k, but a general UAr supply for the community does not exist. With the proper resources, those plants could be operated as a facility to supply UAr for most of the experiments after the DarkSide 20k production. However, if the current source becomes unavailable, or UAr masses greater than what is available from the current source is needed, then a new source must be found. To find a new source will require understanding the production of the radioactive argon isotopes underground in a gas field, and the ability to measure $^{37}$Ar, $^{39}$Ar, and $^{42}$Ar to ultra-low levels. The operation of a facility creates a need for ancillary systems to monitor for $^{37}$Ar, $^{39}$Ar, or $^{42}$Ar infiltration either directly or indirectly, which can also be used to vet the $^{37}$Ar, $^{39}$Ar, and $^{42}$Ar levels in a new UAr source, but requires the ability to separate UAr from the matrix well gas. Finding methods to work with industry to find gas streams enriched in UAr, or to commercialize a UAr facility, are highly desirable.
