Speaker
Chang Hyon Ha
(IBS)
Description
The KIMS group searches for dark-matter interactions using an array of scintillating NaI(Tl) crystals that serve both as a WIMP-interaction target and detector in the low-background environment of the Yangyang underground laboratory. The group has made significant progress to develop low-background, high light-yield, NaI(Tl) crystals for such a WIMP dark-matter search. The goal of this NaI(Tl) experiment is to make an unambiguous test of the controversial DAMA/LIBRA annual modulation signature. So far, studies with more than ten prototype NaI(Tl) crystals have shown progress in the reduction of internal contaminations of radioisotopes. With a new shielding at Yangyang, we plan to start the first phase of the experiment using a total of 100~kg of KIMS and DM-ice crystals. Soon, we expect to achieve a background level of less than 1~counts/day/keV/kg for recoil energies around 2~keV with a total mass of 200~kg. The current status of the effort is reported.
Author
Chang Hyon Ha
(IBS)
