DEAP (Dark Matter Experiment with Argon and Pulse Shape Discrimination) is
an experiment that aims to directly detect dark matter particles via nuclear recoils
in liquid argon. The experiment uses the scintillation property of liquid argon as a
means to discriminate the γ and β backgrounds from the expected signal. DEAP-1
is a 7 kg single phase liquid argon detector. It was constructed to demonstrate the
scalability for a larger (3600 kg) detector. The detector was originally operated at
Queen’s University, where the background rejection level achieved was 6.3×10−8 for
the recoil detection efficiency of 97.1%. The detector was relocated to SNOLAB,
where the background in the energy region of interest was reduced by a factor of
7.7 (from 4.61±0.17 mHz to 0.60±0.05 mHz.). The background rejection level of
9.64×10−9 (10.4 part per billion) was achieved from the combined data set (Queen’s
University and SNOLAB) for a recoil detection efficiency of 35.5 ± 1.3 %. With
the current background rate, the background rejection level required for the 3600 kg
detector (1.8×10−9 ) is projected to be achieved in 382 days at the neutron efficiency
of 9.1±0.6 %. / Thesis (Master, Physics, Engineering Physics and Astronomy) -- Queen's University, 2009-01-26 09:28:25.432
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:OKQ.1974/1688 |
| Date | 02 February 2009 |
| Creators | Pasuthip, PARADORN |
| Contributors | Queen's University (Kingston, Ont.). Theses (Queen's University (Kingston, Ont.)) |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English, English |
| Detected Language | English |
| Type | Thesis |
| Format | 2673598 bytes, application/pdf |
| Rights | This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner. |
| Relation | Canadian theses |
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