Eur. Phys. J. C (2018) 78: 107
https://doi.org/10.1140/epjc/s10052-018-5590-x

Regular Article - Experimental Physics

Initial performance of the COSINE-100 experiment

¹ Department of Physics, Sejong University, Seoul, 05006, Republic of Korea
² Department of Physics, Yale University, New Haven, CT, 06520, USA
³ Physics Institute, University of São Paulo, São Paulo, 05508-090, Brazil
⁴ Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Republic of Korea
⁵ Korea Institute of Science and Technology Information, Daejeon, 34141, Republic of Korea
⁶ Department of Physics, Bandung Institute of Technology, Bandung, 40132, Indonesia
⁷ Department of Physics and Astronomy, University of Sheffield, Sheffield, S3 7RH, UK
⁸ Center for Underground Physics, Institute for Basic Science (IBS), Daejeon, 34047, Republic of Korea
⁹ Department of Science Education, Ewha Womans University, Seoul, 03760, Republic of Korea
¹⁰ Department of Physics, Sungkyunkwan University, Seoul, 16419, Republic of Korea
¹¹ Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, WI, 53706, USA
¹² Department of Physics, Kyungpook National University, Daegu, 41566, Republic of Korea
¹³ Korea Research Institute of Standards and Science, Daejeon, 34113, Republic of Korea
¹⁴ Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
¹⁵ Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie (KIT), 76344, Eggenstein-Leopoldshafen, Germany
¹⁶ Department of Physics and Astronomy, Northwestern University, Evanston, IL, 60208, USA
¹⁷ Department of Physics, Chiba University, Chiba, 263-8522, Japan
¹⁸ High Energy Accelerator Research Organization (KEK), Ibaraki, 319-1106, Japan
¹⁹ Department of Physics, Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, WA, 98195, USA
²⁰ Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
²¹ Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada

^* e-mail: changhyon.ha@gmail.com

Received: 30 November 2017
Accepted: 25 January 2018
Published online: 6 February 2018

Abstract

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.