Self-Introduction

I am a Ph.D. student at the University of Osaka, and a specially-appointed researcher (S) at the RCNP since April, 2025. Beyond my research work in neutron physics below, I enjoy walking in the cities and hiking in the mountains, and I also do archery and jogging. If you play these sports, please let me join! Nice to meet you!

Research Introduction:

The understanding of the origin of the matter-antimatter asymmetry is one of the most fundamental problems in physics, which requires the CP-violation condition in baryogenesis in the early universe. However, the observations of the CP-violation phenomenon are yet insufficient to support this mechanism. A non-zero neutron electric dipole moment (nEDM) is a sensitive probe for searching for CP-violation, and provides direct evidence beyond the Standard Model (BSM). The future experiment by the Japan-Canada collaboration, TRIUMF Ultracold Advanced Neutron (TUCAN), will push the scale to unprecedented sensitivity, allowing us to explore BSM predictions.

My current work at TUCAN focuses on characterizing the source and future spin analysis, as follows.

• Time-of-flight (ToF) Spectrometer Development: This study focuses on characterizing the energy spectrum of the ultracold neutron (UCN) source and UCN transmission/reflection studies in the setups. Such experiments can also test our current simulation program, PENTrack, for more precise simulation results in the future.
• Spin Analyzer (SA) Development: After UCN source characterization, the spin analyzer will be developed to improve the sensitivity of the nEDM measurement. The alternate SA will be developed first due to its stability, to ensure measurements can be performed. And the simultaneous SA, which gives a better precision, will be designed. Different structures will be tested as the geometry will significantly affect the efficiency, and the best one will be selected for the future experiment.