IBS Jeongseon Yemilab, the Deep Underground Facility

Cosmic rays and their induced daughter particles obstruct the measurement of rare signals which are induced by neutrinoless double beta decay (DB) phenomena or dark matters (DM). In the ground laboratory it must be specially much higher than underground one. It is impossible to get the evidence of DB or DM on the ground because of the huge background by cosmic rays. We need cosmic free space somewhere to get clean signal, so built a new deep and large underground facility of Yemilab.