Takenori Shimamura (D2), Department of Precision Engineering, received the Advanced Best Presentation Award


On 27th September 2021, Takenori Shimamura (D2), Mimura Group, Department of Precision Engineering, received the Advanced Best Presentation Award in the JSPE Autumn Annual Meeting 2021

JSPE Autumn Annual Meeting 2021 Advanced Best Presentation Award
This award goes to the speakers who successfully presented their research from the viewpoints of research novelty as well as contents, structure, and techniques of presentation and impressive responses in Q&A sessions. The winners were selected from the presenters who had won the Best Presentation Award before and then presented further significant research in this meeting.

About awarded research
Development of soft-X-ray nanofocusing system for sub-50-nm X-ray probes by ultrashort Kirkpatrick-Baez mirror
Our ultrashort Kirkpatrick-Baez mirror with 2- and 8-mm-long mirrors has an extremely short focal length of 2 mm. While its working distance is also decreased, this design can benefit microscopic observation and X-ray focusing. Compared to the conventional X-ray mirrors whose radii of curvature typically exceed 10 m, these ultrashort mirrors have steeply curved figures with a radius of curvature of 150 mm. In this research, these ultrashort mirrors were fabricated by the differential deposition method. Their measurement employed a scanning white-light interferometer. Figure correction processes successfully produced a reflective surface with a figure error of 2.8 nm in peak-to-valley. This high-NA reflective optic was evaluated in focusing experiments at SPring-8, resulting in 50-nm soft-X-ray nanoprobes. To the best of our knowledge, these results demonstrate unprecedented soft-X-ray focusing that is diffraction-limited and achromatic.

Your impression & future plan
The first time I presented my research and got awarded was when I was a senior undergraduate and attended this meeting in the autumn. It took more time to proceed to the next award than I had expected. However, I am honored to be selected as a recipient of this award at a memorable conference after I had a milestone in my research. I would like to express my deepest appreciation to Associate Professor Mimura and Associate Professor Kimura as well as Dr. Ohashi, Dr. Semba, Mr. Kishimoto, and Assistant Professor Takeo, who gave me the support for performing synchrotron radiation experiments. In addition, I would also like to thank Natsume Optical Corp. whose glass substrates were indispensable for this research.