Speaker
Keonah Shin
(Center for Underground Physics, Institute for Basic Science (IBS))
Description
The COSINE experiment has performed an extensive R&D to develop ultra-low background NaI(Tl) crystals for the next phase COSINE-200 experiment. A ton of radio-pure NaI powder should be prepared for the 200 kg NaI(Tl) detectors. A large-scale recrystallization facility was built and had been operating to mass-produce pure NaI powder. The successful reduction of radioactive contamination in the purified NaI powder was confirmed by an Inductively Coupled Plasma Mass Spectrometer (ICP-MS) and HPGe detectors. Crystals that grew with the purified powder prove a principle of the low-background NaI(Tl) detector. This presentation will discuss NaI powder purification from an R&D to the mass production process.
Primary author
Keonah Shin
(Center for Underground Physics, Institute for Basic Science (IBS))
Co-authors
Dr
Hyun Su Lee
(Center for Underground Physics, Institute for Basic Science(IBS))
Mr
Cheol ho Lee
(Center for Underground Physics, Institute for Basic Science(IBS))
Dr
Olga Gileva
(Center for Underground Physics, Institute for Basic Science (IBS))
Mr
Junseok Choe
(Center for Underground Physics, Institute for Basic Science (IBS))
Dr
Moo Hyun Lee
(Center for Underground Physics, Institute for Basic Science (IBS))
Dr
Yeongduk Kim
(Center for Underground Physics, Institute for Basic Science (IBS))
