You are here

Alpha-Related Backgrounds in the DarkSide-50 Detector

Alissa Monte, University of Massachusetts, Amherst
Thursday, March 22, 2018 - 3:45pm to 4:45pm
NPL Conference Room, Rm 178

​DarkSide-50 is the current phase of the DarkSide direct dark matter search program, operating underground at the Laboratori Nazionali del Gran Sasso in Italy. The detector is a dual-phase argon Time Projection Chamber (TPC), designed for direct detection of Weakly Interacting Massive Particles (WIMPs), and housed within a veto system of liquid scintillator and water Cherenkov detectors. Since switching to a target of low radioactivity argon extracted from underground sources in April 2015, the background is no longer dominated by naturally occurring Ar-39. However, alpha backgrounds from radon and its daughters remain, both from the liquid argon bulk and internal detector surfaces. This talk will focus on the analysis of alpha events in DarkSide-50. In some cases, the alpha events are a dangerous background in need of mitigation. In others, the alpha events can be used as a tool to deepen our understanding of our detector.

Event Type: