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Title: First data from DM-Ice17

Journal Article · · Physical Review. D, Particles, Fields, Gravitation and Cosmology
 [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)

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 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. 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.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Contributing Organization:
DM–Ice Collaboration
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1156499
Alternate ID(s):
OSTI ID: 1180633
Report Number(s):
FERMILAB-PUB-14-045-AE-PPD; arXiv:1401.4804; PRVDAQ; 1278157
Journal Information:
Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 90, Issue 9; ISSN 1550-7998
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 34 works
Citation information provided by
Web of Science

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Cited By (15)

Reduction of the radioactivity in sodium iodide (NaI) powder by recrystallization method journal July 2018
A survey of dark matter and related topics in cosmology journal October 2016
COSINE-100 and DAMA/LIBRA-phase2 in WIMP effective models journal June 2019
Dark matter search project PICO-LON journal May 2016
Scintillation efficiency measurement of Na recoils in NaI(Tl) below the DAMA/LIBRA energy threshold journal July 2015
Understanding internal backgrounds in NaI(Tl) crystals toward a 200 kg array for the KIMS-NaI experiment journal April 2016
Initial performance of the COSINE-100 experiment journal February 2018
Background model for the NaI(Tl) crystals in COSINE-100 journal June 2018
Low background techniques in NaI(Tl) setups journal October 2017
Radioactive contamination of scintillators journal March 2018
Scintillation efficiency measurement of Na recoils in NaI(Tl) below the DAMA/LIBRA energy threshold text January 2015
Measurement of Muon Annual Modulation and Muon-Induced Phosphorescence in NaI(Tl) Crystals with DM-Ice17 text January 2015
Dark matter search project PICO-LON text January 2015
Radioactive contamination of scintillators text January 2018
COSINE-100 and DAMA/LIBRA-phase2 in WIMP effective models text January 2019