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Title: First data from DM-Ice17

We report the first analysis of background data from DM-Ice17, a direct-detection dark matter experiment consisting of 17 kg of NaI(Tl) target material. It was codeployed with IceCube 2457 m deep in the South Pole glacial ice in December 2010 and is the first such detector operating in the Southern Hemisphere. The background rate in the 6.58.0 keVee region is measured to be 7.9±0.4 counts/day/keV/kg. This is consistent with the expected background from the detector assemblies with negligible contributions from the surrounding ice. The successful deployment and operation of DM-Ice17 establishes the South Pole ice as a viable location for future underground, low-background experiments in the Southern Hemisphere. The detector assembly and deployment are described here, as well as the analysis of the DM-Ice17 backgrounds based on data from the first two years of operation after commissioning, July 2011–June 2013.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [4] ;  [3] ;  [4] ;  [6] ;  [3] ;  [6] ;  [7] ;  [4] ;  [4] ;  [4] ;  [6] ;  [3] ;  [6] ;  [6] ;  [8]
  1. Wisconsin U., Madison, PSL
  2. Alberta U.
  3. Wisconsin U., Madison
  4. Yale U.
  5. Fermilab
  6. Sheffield U.
  7. Boulby Underground Lab.
  8. Illinois U., Urbana
Publication Date:
Report Number(s):
FERMILAB-PUB-14-045-AE-PPD; arXiv:1401.4804
1278157
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Phys.Rev.
Additional Journal Information:
Journal Volume: D90; Journal Issue: 9
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
DM-Ice17
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1156499
Alternate Identifier(s):
OSTI ID: 1156499