Design and Experimental Application of a Radon Diffusion Chamber for Determining Diffusion Coefficients in Membrane Materials

Abstract

In recent years, the issue of radon emanation and diffusion has become a critical concern for rare decay experiments, such as JUNO and PandaX-4T. This paper introduces a detector design featuring a symmetric radon detector cavity for the quantitative assessment of membrane materials' radon blocking capabilities. The performance of this design is evaluated through the application of Fick's Law and the diffusion equation considering material solubility. Our detector has completed measurements of radon diffusion coefficients for four types of membrane materials currently used in experiments, which also confirms the rationality of this detector design. The findings are instrumental in guiding the selection and evaluation of optimal materials for radon shielding to reduce radon background, contributing to boost sensitivities of rare event research.

arXiv comment7 pages, 10 figures and 2 tables

References in corpus (5)

• Dark Matter Search Results from the PandaX-4T Commissioning Run
• Radioactivity control strategy for the JUNO detector
• Low Radioactive Material Screening and Background Control for the PandaX-4T Experiment
• ${}^{222}$Rn emanation measurements for the XENON1T experiment
• A New Method for Evaluating the Effectiveness of Plastic Packaging Against Radon Penetration