D
Daisuke Yamakawa
Researcher at Osaka University
Publications - 7
Citations - 628
Daisuke Yamakawa is an academic researcher from Osaka University. The author has contributed to research in topics: Wavefront & Laser. The author has an hindex of 6, co-authored 7 publications receiving 583 citations.
Papers
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Journal ArticleDOI
Breaking the 10 nm barrier in hard-X-ray focusing
Hidekazu Mimura,Soichiro Handa,Takashi Kimura,Hirokatsu Yumoto,Daisuke Yamakawa,Hikaru Yokoyama,Satoshi Matsuyama,Kouji Inagaki,Kazuya Yamamura,Yasuhisa Sano,Kenji Tamasaku,Yoshinori Nishino,Makina Yabashi,Tetsuya Ishikawa,Kazuto Yamauchi +14 more
TL;DR: In this paper, an in situ technique that corrects for wavefront aberrations and allows X-rays to be focused to a spot just 7 nm wide could provide a solution.
Journal ArticleDOI
Focusing mirror for x-ray free-electron lasers.
Hidekazu Mimura,Shinya Morita,Takashi Kimura,Daisuke Yamakawa,Weimin Lin,Yoshihiro Uehara,Satoshi Matsuyama,Hirokatsu Yumoto,Haruhiko Ohashi,Kenji Tamasaku,Yoshinori Nishino,Makina Yabashi,Tetsuya Ishikawa,Hitoshi Ohmori,Kazuto Yamauchi +14 more
TL;DR: A large total-reflection mirror for focusing x-ray free-electron laser beams to nanometer dimensions is presented and a figure accuracy with a peak-to-valley height of 2 nm was achieved across the entire area.
Journal ArticleDOI
A stitching figure profiler of large X-ray mirrors using RADSI for subaperture data acquisition
Takashi Kimura,Haruhiko Ohashi,Hidekazu Mimura,Daisuke Yamakawa,Hirokatsu Yumoto,Satoshi Matsuyama,Takashi Tsumura,Hiromi Okada,Tatsuhiko Masunaga,Yasunori Senba,Shunji Goto,Tetsuya Ishikawa,Kazuto Yamauchi +12 more
TL;DR: In this paper, the authors developed an ultra-precise measurement instrumentation for tangentially long X-ray mirrors using a Fizeau interferometer, where the mirror figure is measured by stitching the subaperture profiles measured by the relative-angle determinable stitching interferometry, which was developed previously.
Journal ArticleDOI
Wavefront Control System for Phase Compensation in Hard X-ray Optics
Takashi Kimura,Soichiro Handa,Hidekazu Mimura,Hirokatsu Yumoto,Daisuke Yamakawa,Satoshi Matsuyama,Kouji Inagaki,Yasuhisa Sano,Kenji Tamasaku,Yoshinori Nishino,Makina Yabashi,Tetsuya Ishikawa,Kazuto Yamauchi +12 more
TL;DR: In this article, a bendable adaptive optical system that can be used in the hard X-ray region was developed to achieve highly precise control of the wavefront shape, and demonstrated the controllability of a wavefront of a 15 nm hard Xray nanobeam.
Proceedings ArticleDOI
Development of adaptive mirror for wavefront correction of hard x-ray nanobeam
Takashi Kimura,Soichiro Handa,Hidekazu Mimura,Hirokatsu Yumoto,Daisuke Yamakawa,Satoshi Matsuyama,Yasuhisa Sano,Kenji Tamasaku,Yoshinori Nishino,Makina Yabashi,Tetsuya Ishikawa,Kazuto Yamauchi,Kazuto Yamauchi +12 more
TL;DR: In this article, a phase compensator for wavefront control of X-rays is presented, which is a 150 mm-long reflection mirror, the shape of which can be curved by adjusting the bias voltages of 36 piezoelectric plates attached to the mirror.