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Münster 2017 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 55: Suche nach Dunkler Materie 2 (Direkter Nachweis)

T 55.1: Gruppenbericht

Dienstag, 28. März 2017, 16:45–17:05, VSH 19

The DEAP-3600 Dark Matter Experiment — •Tina Pollmann1 and DEAP collaboration21Technische Universität München — 2SNOLAB, Sudbury, Canada

DEAP-3600 is a single-phase liquid-argon Dark Matter direct detection experiment located 2 km underground at SNOLAB, in Sudbury, Canada. With a 1 tonne fiducial mass, the target sensitivity to spin-independent scattering of 100 GeV weakly interacting massive particles (WIMPs) is 10−46 cm2. The detector was designed and built to reach a background level of less than 0.6 events in 3 tonne-years exposure. This included designing all parts of the detector to prevent or veto backgrounds, radio-purity screening for all detector materials, working with suppliers to source radio-pure materials, and using construction techniques that limit contaminations with radio-isotopes. The largest remaining background - beta decays from Ar-39 - is mitigated offline through pulse shape analysis. DEAP-3600 finished commissioning in 2015 and is now taking physics data. This paper presents commissioning results and the status of the experiment.

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