Abstract
Center for Underground Physics (CUP) at Institute for Basic Science (IBS) has been operating the COSINE-100 for WIMP search and the AMoRE (Advanced Mo based Rare process Experiment) for neutrinoless double beta decay search. Both experiments are using ultra-pure scintillating crystals at the underground facility to avoid the cosmic muon background.In order to grow the ultra-pure crystals, the raw materials are purified and their radioactive levels are measured using ICP-MS and HPGe. A clean-room facility has been constructed to avoid external contaminations during the crystal treatment procedure after the growth.We present the current status of the crystal growth facility and discuss further about next levels for the ultra-pure crystal production in near future.
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