Abstract:
IceCube, the world’s largest neutrino telescope, is capable of detecting neutrinos at the highest energies, notably above 10 PeV, where GZK or cosmogenic neutrinos are expected. The Chiba IceCube Group has been involved in these extremely high-energy neutrino searches since the early stages of IceCube, producing significant results. Recently our group also plays a key role in developing new optical modules for the next-generation South Pole neutrino telescope.
This talk will highlight two key aspects of recent progress at IceCube and ICEHAP, Chiba University. First, I will provide updates on the cosmogenic neutrino search using IceCube, which has achieved the world's leading sensitivity and placed the most stringent limits on these extremely high-energy neutrino events. Second, I will discuss the design and performance of new optical modules developed and produced at Chiba, including the D-Egg and Gen2-DOM. A total of 310 D-Egg modules have been manufactured and passed a comprehensive 20-day final acceptance test, with the successful units now shipped to the South Pole. Additionally, prototypes of the Gen2-DOM optical modules are currently being produced in Japan and the US, with deployment planned for the 2025/26 South Pole season to ensure they meet the in-situ performance requirements for the IceCube-Gen2 array.
Biography：
Aya earned her Ph.D. in Physics from the University of Texas at Austin and later worked as a Research Associate at the University of Wisconsin-Madison. Following her role as a Research Assistant Professor at Chiba University's Graduate School of Science, she became a Professor at the International Center for Hadron Astrophysics (ICEHAP), Chiba University, in March 2019.
Since 2005, Aya has been a key member of the international IceCube collaboration at the South Pole, contributing to the groundbreaking identification of high-energy astrophysical neutrinos in 2012. Currently, she leads the development of new neutrino detection methods and oversees the design and construction of optical detector arrays for the IceCube-Upgrade and the next-generation IceCube-Gen2.
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