The Monitoring System and Detector Stability of COSINE-100

\mbox{COSINE-100} is a direct detection dark matter experiment consisting of 106 kg of low-background NaI(Tl) crystal detectors located at the Yangyang Underground Laboratory in South Korea. One of the primary physics goals of \mbox{COSINE-100} is to search for a WIMP-induced annual modulation signal to confirm or refute \mbox{DAMA/LIBRA's} claim of dark matter discovery. The search for an annual modulation signal requires a thorough understanding of time-dependent environmental effects and a high degree of detector stability. To achieve the required level of stability, \mbox{COSINE-100} has developed a monitoring system to measure operating conditions, such as temperature, radon levels, and muon rates, over time. Here, I will present the \mbox{COSINE-100} monitoring system and discuss the achieved stability of the \mbox{COSINE-100} detector.