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arxiv: 2004.03463 · v2 · pith:22PAZDYRnew · submitted 2020-04-05 · ⚛️ physics.ins-det · astro-ph.IM· hep-ex

The COSINE-100 Liquid Scintillator Veto System

G. Adhikari , E. Barbosa de Souza , N. Carlin , J. J. Choi , S. Choi , M. Djamal , A. C. Ezeribe , L. E. Franca
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C. Ha I. S. Hahn E. J. Jeon J. H. Jo W. G. Kang M. Kauer H. Kim H. J. Kim K. W. Kim S. K. Kim Y. D. Kim Y. H. Kim Y. J. Ko E. K. Lee H. S. Lee J. Lee J. Y. Lee M. H. Lee S. H. Lee D. S. Leonard B. B. Manzato R. H. Maruyama R. J. Neal S. L. Olsen B. J. Park H. K. Park H. S. Park K. S. Park R. L. C. Pitta H. Prihtiadi S. J. Ra C. Rott K. A. Shin A. Scarff N. J. C. Spooner W. G. Thompson L. Yang G. H. Yu
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classification ⚛️ physics.ins-det astro-ph.IMhep-ex
keywords liquidscintillatorcosine-100backgroundenergysystemvetoalkylbenzene-based
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This paper describes the liquid scintillator veto system for the COSINE-100 dark matter experiment and its performance. The COSINE-100 detector consists of eight NaI(Tl) crystals immersed in 2200~L of linear alkylbenzene-based liquid scintillator. The liquid scintillator tags between 65 and 75\% of the internal $^{40}$K background in the 2--6 keV energy region. We also describe the background model for the liquid scintillator, which is primarily used to assess its energy calibration and threshold.

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