The COSINE-100 dark matter search experiment has started taking physics data with the goal of performing an independent measurement of the annual modulation signal observed by DAMA/LIBRA. A muon detector was constructed by using plastic scintillator panels in the outermost layer of the shield surrounding the COSINE-100 detector. It is used to detect cosmic ray muons in order to understand the impact of the muon annual modulation on dark matter analysis. Assembly and initial performance test of each module have been performed at a ground laboratory. The installation of the detector in Yangyang Underground Laboratory (Y2L) was completed in the summer of 2016. Using three months of data, the muon underground flux was measured to be 328 ± 1(stat.)± 10(syst.) muons/m2/day. In this report, the assembly of the muon detector and the results from the analysis are presented.
@article{arxiv.1712.02011,
title = {Muon detector for the COSINE-100 experiment},
author = {100 Collaboration and H. Prihtiadi and G. Adhikari and P. Adhikari and E. Barbosa de Souza and N. Carlin and S. Choi and W. Q. Choi and M. Djamal and A. C. Ezeribe and C. Ha and I. S. Hahn and A. J. F. Hubbard and E. J. Jeon and J. H. Jo and H. W. Joo and W. Kang and W. G. Kang and M. Kauer and B. H. Kim and H. Kim and H. J. Kim and K. W. Kim and N. Y. Kim and S. K. Kim and Y. D. Kim and Y. H. Kim and V. A. Kudryavtsev and H. S. Lee and J. Lee and J. Y. Lee and M. H. Lee and D. S. Leonard and K. E. Lim and W. A. Lynch and R. H. Maruyama and F. Mouton and S. L. Olsen and H. K. Park and H. S. Park and J. S. Park and K. S. Park and W. Pettus and Z. P. Pierpoint and S. Ra and F. R. Rogers and C. Rott and A. Scarff and N. J. C. Spooner and W. G. Thompson and L. Yang and S. H. Yong},
journal= {arXiv preprint arXiv:1712.02011},
year = {2018}
}