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RE: DM-Ice17
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Title: Results from the DM-Ice17 Dark Matter Experiment at the South Pole
Author: Jay Hyun Jo, for the DM-Ice Collaboration

DM-Ice is a phased experimental program using low-background NaI(Tl) crystals with the aim to unambiguously test the claim of dark matter detection by the DAMA experiments. DM-Ice17, consisting of 17 kg of NaI(Tl), has been continuously operating at a depth of 2457 m in the South Pole ice for over five years, demonstrating the feasibility of a low-background experiment in the Antarctic ice. Studies of low and high energy spectra, an annual modulation analysis, and a WIMP exclusion limit based on the physics run of DM-Ice17 are presented. We also discuss the plan and projected sensitivity of a new joint physics run, COSINE-100, with upgraded detectors at the Yangyang Underground Laboratory in Korea.

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Title: First data from DM-Ice17
Author: DM-Ice Collaboration: J. Cherwinka, D. Grant, F. Halzen, K. M. Heeger, L. Hsu, A. J. F. Hubbard, A. Karle, M. Kauer, V. A. Kudryavtsev, C. Macdonald, R. H. Maruyama, S. Paling, W. Pettus, Z. P. Pierpoint, B. N. Reilly, M. Robinson, P. Sandstrom, N. J. C. Spooner, S. Telfer, L. Yang

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 co-deployed 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. 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.

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