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RIKEN SPring-8 Center Ultrafast Characterization and Analysis of Material Processing Team

Team Leader: Hidekazu Mimura (Ph.D.)

Research Summary

Hidekazu Mimura

Our team will be responsible for developing elemental technologies (X-ray optics and detectors, etc.) and methods for evaluating machining, deformation, and destruction process of various materials and devices in an ultrafast and nanometer resolution by using brilliant, high-energy X-rays from SPring-8. The team will then construct integrated evaluation systems and apply them to practical analyses in collaborating with a broad range of industrial and academic sectors, contributing development of advanced processing.

Related Research Fields

  • Engineering
  • Interdisciplinary Science & Engineering
  • Production Engineering
  • Material Processing


  • High speed X-ray imaging
  • Processing Phenomena Analysis
  • Machining
  • Non-traditional Machining
  • Machine Tool

Selected Publications

  • 1. G. Yamaguchi, H. Motoyama, S. Owada, Y. Kubota, S. Egawa, T. Kume, Y. Takeo, M. Yabashi, H. Mimura.:
    "Copper electroforming replication process for soft x-ray mirrors"
    Review of Scientific Instruments, 92, 123106 (2021).
  • 2. Y. Takeo, A. Suzuki, H. Motoyama, Y. Takei, T. Kume, Y. Matsuzawa, Y. Senba, H. Kishimoto, H. Ohashi, and H. Mimura.:
    "Soft x-ray nanobeam formed by an ellipsoidal mirror"
    Applied Physics Letters, 116, 121102 (2020).
  • 3. Y. Takeo, H. Motoyama, T. Shimamura, T. Kimura, T. Kume, Y. Matsuzawa, T Saito, Y. Imamura, H. Miyashita, K. Hiraguri, H. Hashizume, Y. Senba, H. Kishimoto, H. Ohashi, and H. Mimura.:
    "A highly efficient nanofocusing system for soft x rays"
    Appl. Phys. Lett. 117, 151104 (2020).
  • 4. S. Egawa, S. Owada, H. Motoyama, G. Yamaguchi, Y. Matsuzawa, T. Kume, Y. Kubota, K. Tono, M. Yabashi, H. Ohashi, and H. Mimura.:
    "Full-field microscope with twin Wolter mirrors for soft X-ray free-electron lasers"
    Opt. Express 27(23), 33889-33897 (2019).
  • 5.H. Motoyama, S. Owada, G. Yamaguchi, T. Kume, S. Egawa, K. Tono, Y. Inubushi, T. Koyama, M. Yabashi, H. Ohashi, and H. Mimura.:
    "Intense sub-micron focusing of soft x-ray free-electron laser beyond 10^16 W/cm^2 with an ellipsoidal mirror"
    J. Synchrotron Radiat., 26, 1406-1411 (2019).
  • 6. H. Mimura, Y. Takei, T. Kume, Y. Takeo, H. Motoyama, S. Egawa, Y. Matsuzawa, G. Yamaguchi, Y. Senba, H. Kishimoto, H. Ohashi.:
    "Fabrication of a precise ellipsoidal mirror for soft X-ray nanofocusing"
    Review of Scientific Instruments, 89, 093104 (2018).
  • 7. H. Mimura, H. Yumoto, S. Matsuyama, T. Koyama, K. Tono, Y. Inubushi, T. Togashi, T. Sato, J. Kim, R. Fukui, Y. Sano, M. Yabashi, H. Ohashi, T. Ishikawa, K. Yamauchi.:
    "Generation of 1020 Wcm-2 hard X-ray laser pulses with two stage reflective focusing system"
    Nature communications 5 3539, doi:10.1038/ncomms4539 (2014).
  • 8. H. Mimura, S. Handa, T. Kimura, H. Yumoto, D. Yamakawa, H. Yokoyama, S. Matsuyama, K. Inagaki, K. Yamamura, Y. Sano, K. Tamasaku, Y. Nishino, M. Yabashi, T. Ishikawa, K. Yamauchi.:
    "Breaking the 10nm barrier in hard-X-ray focusing"
    Nature Physics, 6 (2), 122-125, (2010).
  • 9. H. Mimura, H. Yumoto, S. Matsuyama, Y. Sano, K. Yamamura, Y. Mori, M. Yabashi, Y. Nishino, K. Tamasaku, T. Ishikawa, K. Yamauchi.:
    "Efficient focusing of hard x rays to 25 nm by a total reflection mirror"
    Applied Physics Letters, 90, 051903-1-3, (2007).
  • 10. H. Mimura, K. Yamauchi, K. Yamamura, A. Kubota, S. Matsuyama, Y. Sano, K. Ueno, K. Endo, Y. Nishino, K. Tamasaku, M. Yabashi, T. Ishikawa.:
    "Image quality improvement in a hard X-ray projection microscope using total reflection mirror optics"
    Journal of Synchrotron Radiation, 11, 343-346 (2004).

Lab Members

Principal investigator

Hidekazu Mimura
Team Leader

Contact Information

1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5148 Japan
Email: hidekazu.mimura [at] riken.jp