[9p-W833-1~9] Surface Science Innovation by Positron Diffraction and High Performance Data Driven Science

[9p-W833-1] Positron Diffraction Stations at Slow Positron Facility of IMSS, KEK

〇Toshio Hyodo¹ (1.IMSS, KEK)

Keywords:positron diffraction, surface, structure analysis

Positron diffraction, i.e., Total-reflection High-energy Positron Diffraction (TRHEPD) and Low-energy Positron Diffraction (LEPD) are the surface structure analysis methods with the highest surface sensitivity. The world's only apparatuses for both methods using a high brightness positron beam are operating at Institute of Materials Structure Science, KEK. TRHEPD, in particular, is proposed and realized by Japanese scientists and many achievements have already been made [1]. Described in this presentation are the method of creating high-intensity and high-brightness positron beam required for the measurements and recent results made by using it. [1] Yuki Fukaya, et al., J. Phys. D: Appl. Phys. 52, 013002 (2019).