2021-11-12 11:00  P5A-1

The TAROGE-M Project, Probing Mystery of the Anomalous Ultra-high Energy Upward-moving Air-showers

Jiwoo Nam

Anomalous upward-moving air-shower events with energies of ~0.6×10^18 eV reported by ANITA are great mysteries which cannot be explained by standard model and received a lot of attention with various new theoretical proposals. Reproduction of these results with significant statistics is highly demanded. We propose a new radio array experiment on the top of high mountains in Antarctica, which is utilized to detect the upward moving air-showers. We follow the ANITA’s experimental concept, but our approach installing antennas on high mountains has great advantages over ANITA such as, lower the energy threshold, enhanced effective volume due to dense rock target in nearby mountains, a long lifetime, and extendibility. We propose to install 10 stations over the next 5 years to obtain sufficient sensitivity to test ANITA’s "mystery events". The first station consisting of 6 LPDA antennas has been installed atop Mt. Melbourne, Antarctica at an elevation of 2730 m, in Austral summer season 2019-2020. We present the scientific potential, detector design and construction, performance of the station, as well as future plan.