In-situ surface contamination removal and cool-down process of the DEAP-3600 experiment

[摘要] The DEAP-3600 experiment is a single-phase detector that uses 3600 Kg of liquid argon to search for Dark Matter at SNOLAB, Sudbury, Canada, 6800 ft. underground. The projected sensitivity to the spin-independent WIMP-nucleon cross-section is 10-46cm2for a WIMP mass of 100 GeV. A key experimental requirement is the reduction of any possible source of background that would mimic a Dark Matter signal This document will review how radiogenic surface backgrounds were reduced in-situ by removing 500 microns of acrylic from the innermost part of the detector with a resurfacing robot. Furthermore it will review the transient cool-down process of the experiment, necessary to reach cryogenic operating temperature.

[发布机构] Queens University, Physics Dept., Kingston; ON; 3N6, Canada^1

[效力级别] 天文学 [学科分类] 天文学(综合)

[关键词] Dark matter;Experimental requirements;Liquid argon;Operating temperature;Single phase;Surface contaminations