TY - JOUR
AU - Zhao, J.
AB - Abstract:Rare event searches such as neutrinoless double beta decay and Weakly Interacting Massive Particle detection require ultra-low background detectors. Radon contamination is a significant challenge for these experiments, which employ highly sensitive radon assay techniques to identify and select low-emission materials. This work presents the development of ultra-sensitive electrostatic chamber (ESC) instruments designed to measure radon emanation in a recirculating gas loop, for future lower background experiments. Unlike traditional methods that separate emanation and detection steps, this system allows continuous radon transport and detection. This is made possible with a custom-built recirculation pump. A Python-based analysis framework, PyDAn, was developed to process and fit time-dependent radon decay data. Radon emanation rates are given for various materials measured with this instrument. A radon source of known activity provides an absolute calibration, enabling statistically-limited minimal detectable activities of 20 $\mu$Bq. These devices are powerful tools for screening materials in the development of low-background particle physics experiments.
TI - Ultra-sensitive radon assay using an electrostatic chamber in a recirculating system
JF - High Energy Physics - Experiment
DO - 10.48550/arxiv.2504.15464
DA - 2025-04-24
UR - https://www.deepdyve.com/lp/arxiv-cornell-university/ultra-sensitive-radon-assay-using-an-electrostatic-chamber-in-a-8htisvJkgh
VL - 2025
IS - 2504
DP - DeepDyve
ER -