Particle and Astroparticle Seminar

EAP-3600 Overview and Current Status

Thomas McElroy

University of Alberta

The DEAP-3600 experiment is a Dark Matter experiment built in SNOLAB. DEAP contains 3500 kg of ultra-pure liquid Ar (LAr). The expected sensitivity to the spin-independent WIMP-nucleon cross-section is 10^-46 cm² at 100 GeV WIMP mass. This is achieved due to very careful selection of materials, the development of a unique acrylic cryostat incorporating light guides and neutron shielding, which also enabled the development of special robotic resurfacing equipment to remove plated radon daughters before sealing the inner detector from air. Pulse Shape Discrimination (PSD) is used in a single phase measurement to reject electromagnetic backgrounds with an expected discrimination level of 10^10. DEAP-3600 completed construction in 2015 and was filled with LAr in 2016.

An overview and current status of the DEAP-3600 experiment is presented. Key aspect of the analysis including pulse finding, photon timing and pile-up rejection will be discussed.