在神冈矿山开发新的氡监测系统
Development of new radon monitoring systems in the Kamioka mine
摘要：
氡的放射性是高精度低能物理实验的主要威胁，比如在神冈矿进行的实验。我们开发了一种新的高灵敏度氡监测系统，并在神冈首次进行了系统的氡浓度测量。该系统包括容量为1升的便携式氡探测器和基于Raspberry Pi的新电子设备。这些氡探测器通过静电收集和PIN光电二极管测量空气中的氡。我们测量了1升氡探测器对空气的绝对湿度依赖性为$C_{F} (A_{H}) = (12.86 \pm 0.40) - (1.66 \pm 0.19) \sqrt{A_{H}}$ $\mathrm{(counts/day)/(Bq/m^3)}$。1升氡探测器的本底水平为$0.65\pm0.15$（统计）计数/天。这对应于一天测量中$\sim0.4$ Bq/m $^3$的检测极限。在神冈矿用21个1升氡探测器收集了一年多的数据。它们表明矿井内氡浓度的季节性和昼夜变化。这些结果也使我们能够确认新Raspberry Pi电子器件的稳定性。
英文摘要：
Radioactivity from radon is a major threat for high-precision low energy physics experiments like the ones in the Kamioka Mine. We developed a new high sensitive radon monitoring system and conducted systematic radon concentration measurements for the first time in Kamioka. The system consists of portable radon detectors with a capacity of 1 L and new electronics based on Raspberry Pi. These radon detectors measure the radon in air with electro-static collection and a PIN photodiode. We measured the absolute humidity dependence of the 1-L radon detector for air to be $C_{F} (A_{H}) = (12.86 \pm 0.40) - (1.66 \pm 0.19) \sqrt{A_{H}}$ $\mathrm{(counts/day)/(Bq/m^3)}$. The background level of the 1-L radon detector is $0.65\pm0.15$ (stat.) count/day. This corresponds to a detection limit of $\sim0.4$ Bq/m$^3$ in a one-day measurement. Data was collected for a period of more than one year with twenty one 1-L radon detectors in the Kamioka mine. They indicate seasonal and day-night variations in radon concentration within the mine. These results also allow us to confirm the stability of the new Raspberry Pi electronics.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
