Low-Energy Threshold Analysis Using the DEAP-3600 Dark Matter Detector

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  • DEAP-3600 is a single-phase liquid argon WIMP detector located 2km underground in the SNOLAB research facility. DEAP-3600 is searching for dark matter; an elusive form of matter that was first postulated in the early 20th century, but has not yet been found. The goal of this work is to perform a low mass WIMP search. A low mass WIMP search is made possible by lowering the energy threshold of the hardware trigger from 1000ADC to 150ADC. Low energy events in the detector are characterized as Cherenkov radiation, low energy retriggers, or high energy retriggers; all of which are background events. The final data set has a live time of 2.10 days and an exposure of 4.41×103kg·days using a LAr target mass of (3279±97) kg. The results from the low mass WIMP search is a WIMP-nucleon spin independent cross-section of 3.96×10−42cm2at a 90% CL corresponding to WIMPs with mass 55 GeV/c2.

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  • Copyright © 2019 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
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  • 2019

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