Status and prospect of the ANKOK project: Low mass WIMP dark matter search using double phase argon detector

The ANKOK project is a dark matter search experiment using an argon detector specialized for the low mass (∼ 10 GeV/c²) WIMP detection. We are currently proceeding with R&D efforts to understand the background sources, develop and apply new photo sensor that is directly sensitive to 128 nm argon scintillation light and improve electron recoil type background rejection. In the next few years, we are planning to construct such an argon detector in an underground laboratory with enough sensitivity to detect low mass WIMP.