T
Takashi Kimura
Researcher at Hokkaido University
Publications - 30
Citations - 851
Takashi Kimura is an academic researcher from Hokkaido University. The author has contributed to research in topics: Deformable mirror & Adaptive optics. The author has an hindex of 10, co-authored 30 publications receiving 751 citations. Previous affiliations of Takashi Kimura include Osaka University.
Papers
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Journal ArticleDOI
Focusing of X-ray free-electron laser pulses with reflective optics
Hirokatsu Yumoto,Hidekazu Mimura,Takahisa Koyama,Satoshi Matsuyama,Kensuke Tono,Tadashi Togashi,Yuichi Inubushi,Takahiro Sato,Takashi Tanaka,Takashi Kimura,Hikaru Yokoyama,Jangwoo Kim,Yasuhisa Sano,Yousuke Hachisu,Makina Yabashi,Haruhiko Ohashi,Hitoshi Ohmori,Tetsuya Ishikawa,Kazuto Yamauchi +18 more
TL;DR: In this paper, the authors focus 10 keV X-ray free-electron laser radiation to an area of 0.95 µm × 1.20 µm with near-100%-efficiency using reflective optics.
Journal ArticleDOI
Imaging live cell in micro-liquid enclosure by X-ray laser diffraction
Takashi Kimura,Yasumasa Joti,Akemi Shibuya,Changyong Song,Sang Soo Kim,Kensuke Tono,Makina Yabashi,Masatada Tamakoshi,Toshiyuki Moriya,Tairo Oshima,Tetsuya Ishikawa,Yoshitaka Bessho,Yoshinori Nishino +12 more
TL;DR: This work presents a method for capturing snapshots of live cells kept in a micro-liquid enclosure array by X-ray laser diffraction and reveals living whole-cell structures without any staining, which helps advance understanding of intracellular phenomena.
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Single-nanometer focusing of hard x-rays by Kirkpatrick–Baez mirrors
Kazuto Yamauchi,Hidekazu Mimura,Takashi Kimura,Hirokatsu Yumoto,Soichiro Handa,Satoshi Matsuyama,Kenta Arima,Yasuhisa Sano,Kazuya Yamamura,Koji Inagaki,Hiroki Nakamori,Jangwoo Kim,Kenji Tamasaku,Yoshinori Nishino,Makina Yabashi,Tetsuya Ishikawa +15 more
TL;DR: An at-wavelength wavefront error sensing method based on x-ray interferometry and an in situ phase compensator mirror, which adaptively deforms with nanometer precision, were developed to satisfy the Rayleigh criterion to achieve diffraction-limited focusing in a single-nanometer range.
Journal ArticleDOI
Nearly diffraction-limited X-ray focusing with variable-numerical-aperture focusing optical system based on four deformable mirrors.
Satoshi Matsuyama,Hiroki Nakamori,Takumi Goto,Takashi Kimura,Krishna P. Khakurel,Yoshiki Kohmura,Yasuhisa Sano,Makina Yabashi,Tetsuya Ishikawa,Yoshinori Nishino,Kazuto Yamauchi +10 more
TL;DR: This research developed a variable-NA X-ray focusing system based on four deformable mirrors, two sets of Kirkpatrick–Baez-type focusing mirrors, in order to control the focusing size while keeping the position of the focus unchanged.
Journal ArticleDOI
Synthesis of Janus-Like Gold Nanoparticles with Hydrophilic/Hydrophobic Faces by Surface Ligand Exchange and Their Self-Assemblies in Water
Ryo Iida,Hitoshi Kawamura,Kenichi Niikura,Takashi Kimura,Shota Sekiguchi,Yasumasa Joti,Yoshitaka Bessho,Hideyuki Mitomo,Yoshinori Nishino,Kuniharu Ijiro +9 more
TL;DR: It is found that the choice of immobilization methods, one-step or two-step addition of the two ligands to the GNP solution, crucially affects the degree of segregation.