17-22 July 2016
Master Cutlers Hall
Europe/London timezone

Calibration of the DEAP-3600 Dark Matter Detector

19 Jul 2016, 14:20
20m
Venue: Cutlers' Main Hall (First Floor); Chair: Darren Grant; Session Manager: David Woodward ()

Venue: Cutlers' Main Hall (First Floor); Chair: Darren Grant; Session Manager: David Woodward

Speaker

Dr. Nasim Fatemighomi (Royal Holloway University of London)

Description

DEAP-3600 is a single phase liquid argon (LAr) dark matter experiment, located 2 km underground at SNOLAB, in Sudbury, Ontario. The detector has 1 tonne fiducial mass of LAr. Calibration of the DEAP-3600 experiment with optical and tagged radiation sources is ongoing. Two systems are used to characterize the overall detector optical response and to monitor the properties of the PMTs. The first consists of a diffuse laserball lowered in the interior of the detector prior to filling with liquid argon. The second is installed permanently in the detector and operational throughout the lifetime of the experiment and injects light using fibre optic cables. In order to study detectors energy response, internal Ar-39 background from natural argon in the detector and a tagged Na-22 source are used. The latter is also used in order to understand the position response of the detector. The Na-22 source and a tagged AmBe neutron source are used to study the detector’s pulse shape discrimination against electronic background and to understand de- tector response to nuclear recoil events. The projected background level is < 0.6 events in an exposure of 3000 kg-years, allowing sensitivity to 10$^{−46}$ cm$^{2}$ at 100 GeV/c$^{2}$ mass. In this talk an overview of the DEAP-3600 calibration system is given and most recent calibration data are shown.

Primary author

Dr. Nasim Fatemighomi (Royal Holloway University of London)

Presentation Materials

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