Development and Initial Performance of an Upgraded NaI(Tl) Crystal Encapsulation for COSINE-100U

Doohyeok Lee, Jae Young Cho, Chang Hyon Ha +23

The COSINE-100 experiment was designed to test the DAMA/LIBRA annual-modulation claim using low-background NaI(Tl) detectors. For the COSINE-100U upgrade, we developed a new crysta…