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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 6.5–8.0 keV ee 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. Furthermore, 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] ;  [1] ;  [3] ;  [4] ;  [5] ;  [1] ;  [5] ;  [6] ;  [6] ;  [3] ;  [7] ;  [5] ;  [5] ;  [8] ;  [6] ;  [1] ;  [6] ;  [6] ;  [9]
  1. Univ. of Wisconsin, Madison, WI (United States)
  2. Univ. of Alberta, Edmonton, AB (Canada)
  3. Yale Univ., New Haven, CT (United States)
  4. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  5. Univ. of Wisconsin, Madison, WI (United States); Yale Univ., New Haven, CT (United States)
  6. Univ. of Sheffield, Sheffield (United Kingdom)
  7. STFC Boulby Undergroung Science Facility, Cleveland (United Kingdom)
  8. Univ. of Wisconsin, Madison, WI (United States); Yale Univ., New Haven, CT (United States); Univ. of Wisconsin - Fox Valley, Menasha, WI (United States)
  9. Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
Publication Date:
Report Number(s):
FERMILAB-PUB-14-045-AE-PPD; arXiv:1401.4804
Journal ID: ISSN 1550-7998; PRVDAQ; 1278157
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 90; Journal Issue: 9; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Contributing Orgs:
DM–Ice Collaboration
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: 1180633