暗物质探测是粒子物理最为前沿的发展方向之一，其结果将大大影响人类对宇宙世界的认识。由于暗物质与普通物质作用截面非常小，因此暗物质探测实验对本底有极高的要求，氡衰变是其重要的本底来源。为满足暗物质实验对测氡、除氡方面的使用需求，本项目提出“10µBq/m3量级氡浓度测量及低温活性炭除氡设备研制”计划。. 在氡浓度测量研究方面，将以现有设备为基础深入开展不锈钢表面处理控制氡析出、优化电极分布增大收集电压提高探测效率等工作，将探测器灵敏度提高25倍；在活性炭氡吸附研究方面，将自主开展低本底活性炭研制、高效除氡及氡富集设备研制工作，实现40倍以上的氡富集与产生氡浓度低至µBq/m3量级的气体。. 本项目研究成果将获得国内灵敏度最高的氡浓度测量设备，与国际先进水平相当，满足暗物质实验测氡需求，本项目研制的除氡设备同样可用于其它低本底实验和低氡环境，具有很强的前沿性与实际应用价值。

The dark matter experiment is one of the leading direction of particle physics, and the result will greatly deepen the human cognition of the universe. The cross section of dark matter and ordinary matter is very small, thus the dark matter searching experiments have very strict requirements on background. Radon decay is one of the most important sources of background. To satisfy the radon concentration measurement and radon removal requirement of dark matter searching experiments, “The development of 10µBq/m3 level radon concentration measurement and low temperature activated carbon radon removal equipment” project has been proposed.. In the aspect of radon concentration measurement equipment, on the basis of early radon concentration measurement equipment, the researchers will try to increase the sensitivity 25 times by means of treating the surface of stainless steel to reduce the radon emanation and improving the detecting efficiency by optimizing the geometry of the electrode and increasing the collecting high voltage. In the aspect of activated carbon radon absorption equipment, based on the industrial level of China, the researchers will fulfill the goal of enriching the radon concentration by 40 times and producing the µBq/m3 level radon by developing low background carbon and the high efficiency radon removal and radon enrichment equipment.. The output of this project will be the most sensitive radon concentration measurement equipment in China, which also reach the international advanced level and meet the requirements of dark matter searching experiment in radon concentration measurement. The radon removal equipment which developed in this project can also be used in other low background experiments and other low radon background environment. This project has very strong frontier and practical application value.