Initial performance of the COSINE-100 experiment

COSINE is a dark matter search experiment based on an array of low background NaI(Tl) crystals located at the Yangyang underground laboratory. The assembly of COSINE-100 was completed in the summer of 2016 and the detector is currently collecting physics quality data aimed at reproducing the DAMA/LIBRA experiment that reported an annual modulation signal. Stable operation has been achieved and will continue for at least 2 years. Here, we describe the design of COSINE-100, including the shielding arrangement, the configuration of the NaI(Tl) crystal detection elements, the veto systems, and the associated operational systems, and we show the current performance of the experiment.
Institute for Basic Science ( IBS-R016-A1)
University of Illinois at Urbana-Champaign
Alfred P. Sloan Foundation (Fellowship)
National Science Foundation (U.S.) (Grant PHY-1457995)
National Science Foundation (U.S.) (Grant PHY-1151795)
National Science Foundation (U.S.) (Grant DGE-1122492)
National Science Foundation (U.S.) (Grant DGE1256259)
Wisconsin IceCube Particle Astrophysics Center
University of Wisconsin. Alumni Research Foundation
Yale University
United States. National Nuclear Security Administration (Grant DE-FC52-08NA28752)
Science and Technology Facilities Council (Great Britain) (Grant ST/N000277/1)
Science and Technology Facilities Council (Great Britain) (Grant ST/K001337/1)
Conselho Nacional de Pesquisas (Brazil) (Grant 2017/02952-0 FAPESP)