Status of the KIMS-NaI experiment
Kyungwon Kim (the KIMS Collaboration)
TL;DR
The KIMS-NaI experiment aims to detect WIMPs using NaI(Tl) crystals, focusing on reducing background noise and improving pulse shape discrimination to enhance detection sensitivity.
Contribution
This work reports on testing low-background NaI(Tl) crystals and evaluating pulse shape discrimination techniques for WIMP detection.
Findings
Background levels reduced to 1 dru at 2 keV
Pulse shape discrimination shows promise for background rejection
WIMP mass limit evaluation is in progress
Abstract
KIMS-NaI is a direct detection experiment searching for Weakly Interacting Massive Particles (WIMP) via their scattering off of nuclei in a NaI(Tl) crystal. The KIMS-NaI collaboration has carried out tests of six crystals in the Yangyang underground laboratory in order to develope low-background NaI(Tl) crystals. Studies of internal backgrounds crystals have been performed with the goal of reducing backgrounds levels to 1 dru at 2 keV. Pulse shape discrimination (PSD) capabilities were also investigated for distinguishing between WIMP nuclear recoil signals and electron recoil backgrounds. The PSD analysis was applied to underground data with one low background NaI(Tl) detector and the evaluation of WIMP mass limit is ongoing.
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Taxonomy
TopicsDark Matter and Cosmic Phenomena · Particle physics theoretical and experimental studies · Atomic and Subatomic Physics Research