Speaker
Dr
Moo Hyun Lee
(Center for Underground Physics, Institute for Basic Science (IBS))
Description
The AMoRE (Advanced Molybdenum based Rare process Experiment) is an experiment searching for neutrinoless double beta decay of Mo-100 in molybdate based crystal scintillators using a cryogenic detection technique. The crystals are equipped with metallic magnetic calorimeter (MMC) sensors for detection of both phonon and photon signals at temperatures of few tens of mK. Simultaneous measurements of thermal and scintillation signals produced by a particle interaction in crystals by the MMC sensors provide high energy resolution and efficient particle discrimination. The AMoRE-pilot, an R&D phase with six 48deplCa100MoO4 crystals and a total mass of ~1.9 kg in the final configuration, was running at the 700-m-deep Yangyang underground laboratory (Y2L). After completion of the AMoRE-pilot run in the end of 2018, the AMoRE-I is being prepared with ~6 kg of crystals, thirteen 48deplCa100MoO4 and five Li2100MoO4, to be installed at the Y2L by January 2020. We have secured 110 kg of Mo-100 isotopes for production of the AMoRE-II crystals. The AMoRE-II with ~200 kg of molybdate crystals will be running at the Yemilab, new underground laboratory located ~1,100 m deep at Handeok iron mine and being excavated from March 2019 for a completion by the end of 2020. The AMoRE-II is expected to improve upper limit of effective Majorana neutrino mass down to the level of inverted hierarchy region of the neutrino mass, 20-50 meV, when no such decays are observed. Results of the AMoRE-pilot and progress of the AMoRE-I and AMoRE-II preparation will be presented.
Primary author
Dr
Moo Hyun Lee
(Center for Underground Physics, Institute for Basic Science (IBS))
