Jun 13 – 19, 2015
University of Alberta
America/Edmonton timezone
Welcome to the 2015 CAP Congress! / Bienvenue au congrès de l'ACP 2015!

Study of neck alpha backgrounds in the DEAP-3600 dark matter detector

Jun 17, 2015, 7:06 PM
CCIS Ground Floor PCL lounge (University of Alberta)

CCIS Ground Floor PCL lounge

University of Alberta

Poster (Student, In Competition) / Affiche (Étudiant(e), inscrit à la compétition) Particle Physics / Physique des particules (PPD) PPD Poster Session with beer / Session d'affiches, avec bière PPD


Courtney Mielnichuk


DEAP-3600 is dark matter detector that will be searching for spin-independent interactions of weakly interacting massive particles with a 1000 kg fiducial volume of liquid argon contained in an acrylic sphere. Strict material selection has been implemented to minimize the presence of uranium and thorium. Alpha decays of these elements in the detector neck will produce scintillation light capable of mimicking a dark matter signal. In order to estimate the backgrounds in the detector, projected material radioactivity levels have been incorporated into Monte Carlo simulations. A likelihood ratio algorithm has been developed based on these simulations to identify possible background events in the DEAP-3600 detector. The results of the Monte Carlo simulations, with focus on the algorithm developed, will be discussed.

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