Low Background Beta Detection with a Time Projection Chamber
Analysis
This paper presents a novel Time Projection Chamber (TPC) system designed for low-background beta radiation measurements. The system's effectiveness is demonstrated through experimental validation using a $^{90}$Sr beta source and a Geant4-based simulation. The study highlights the system's ability to discriminate between beta signals and background radiation, achieving a low background rate. The paper also identifies the sources of background radiation and proposes optimizations for further improvement, making it relevant for applications requiring sensitive beta detection.
Key Takeaways
- •Developed a TPC system for low-background beta radiation measurements.
- •Verified the system's performance with a $^{90}$Sr beta source and Geant4 simulations.
- •Achieved a low background rate and identified sources of background radiation.
- •Proposed optimizations for further reduction of background noise.
Reference
“The system achieved a background rate of 0.49 $\rm cpm/cm^2$ while retaining more than 55% of $^{90}$Sr beta signals within a 7 cm diameter detection region.”