Development of low-background NaI(Tl) crystals for the COSINE-200 experiment

30 Aug 2021, 18:00
1h 30m
Poster Dark Matter and its detection Poster session 1


Byungju Park (Univ of Science and Technology)


COSINE-100 is a WIMP dark matter search experiment using ultra low-background NaI(Tl) crystals as a goal to revisit DAMA/LIBRA experiment. COSINE-100 is running with a 106 kg array of low-background NaI(Tl) crystals with approximately 3 counts/kg/day/keV, which is about three times higher than DAMA/LIBRA’s crystals. For the unambiguous conclusion of the DAMA/LIBRA's observation, it is essential to have lower background crystals at least at the level of the DAMA/LIBRA crystals. The Center for Underground Physics (CUP) has been growing low-background NaI(Tl) crystals since 2018 for COSINE-200, and succeeded to produce low-background Tl-doped crystals. We also developed crystal machining, polishing, and detector assembly techniques as well. Home-made detectors were tested at the Yangyang underground laboratory.

In this presentation, the CUP-grown crystals and their performance will be discussed.

Primary author

Byungju Park (Univ of Science and Technology)

Presentation Materials

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now