Jul 24 – 28, 2017
Other Institutes
Canada/Eastern timezone

Characterization of a High-Sensitivity Radon Emanation System

Jul 26, 2017, 1:00 PM
15m
Executive Learning Center

Executive Learning Center

Contributed talk Labs and Low Background Labs and Low Background

Speaker

Daniel Jardin (Southern Methodist University)

Description

Radon is an important background consideration for rare-event searches such as dark matter direct detection and neutrinoless double-beta decay experiments. Materials of construction for these experiments often require screening of ultra-low radon levels, sometimes as few as tens of atoms in equilibrium. Radon emanation is one of the most sensitive and robust ways of making these measurements. A system for low-level measurements has been commissioned at the Pacific Northwest National Laboratory (PNNL) that achieves high sensitivity through use of custom high-efficiency ultra-low-background proportional counters. The system includes small and large radon emanation chambers coupled to a custom-built gas handling system with a cryogenic radon trap. The emanation system and detection method will be described, and characterization of backgrounds and efficiencies using a calibrated radon source will be discussed.

Primary author

Daniel Jardin (Southern Methodist University)

Co-author

Ray Bunker (Pacific Northwest National Laboratory)

Presentation materials