Developing a highly sensitive $^{222}$Rn concentration measurement system for the water Cherenkov detector of Jiangmen Underground Neutrino Observatory
| Autor: | Liu, Y., Zhang, Y. P., Liu, J. C., Guo, C., Zhang, C. G. Yang. P., Tang, Q., Xu, Z. F., Li, C., Guan, T. Y., Wang, S. B. |
|---|---|
| Rok vydání: | 2023 |
| Předmět: | |
| DOI: | 10.48550/arxiv.2301.00959 |
| Popis: | The Jiangmen Underground Neutrino Observatory (JUNO), a 20 kton multipurpose underground liquid scintillator detector, was proposed for the determination of the neutrino mass hierarchy as primary physics goal. The central detector will be submerged in a water Cherenkov detector to lower the background from the environment and cosmic muons. Radon is one of the primary background sources. Nitrogen will be used in several sub-systems, and a highly sensitive radon detector has to be developed to measure its radon concentration. A system has been developed based on $^{222}$Rn enrichment of activated carbon and $^{222}$Rn detection of the electrostatic collection. This paper presents the detail of a $\mu$Bq/m$^3$ $^{222}$Rn concentration measurement system and gives detailed information about how the adsorption coefficient was measured and how the temperature, flow rate, and $^{222}$Rn concentration affect the adsorption coefficient. Comment: 16 pages, 9 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|