Dr. Jumpei Yamada Profile

Dr. Jumpei Yamada

at Osaka Univ

SPIE Involvement:

Author

Publications (10)

Proceedings Article | 6 June 2023 Presentation

Nonisotropic atomic motion in a nonthermal phase transition of diamond (Conference Presentation)

Vladimir Lipp, Paloma Martinez, Nikita Medvedev, Franz Tavella, Victor Tkachenko, Sven Toleikis, Makina Yabashi, Toshinori Yabuuchi, Jumpei Yamada, Beata Ziaja-Motyka, Philip Heimann, Nicholas Hartley, Ichiro Inoue, Andre Antoine, Fabien Dorchies, Roger Falcone, Jérôme Gaudin, Hauke Höppner, Yuichi Inubushi, Hae Ja Lee

Proceedings Volume 12578, 1257808 (2023) https://doi.org/10.1117/12.2669316

KEYWORDS: Diamond, X-rays, Diffraction, X-ray diffraction, Graphite, X-ray lasers, Laser radiation, Free electron lasers, Crystals

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Proceedings Article | 1 September 2021 Presentation + Paper

Analytic von Hamos geometry optimization and calibration

Franklin Fuller, Uwe Bergmann, Roberto Alonso-Mori, Dimosthenis Sokaras, Ichiro Inoue, Jumpei Yamada, Taito Osaka, Chantal Mustoe

Proceedings Volume 11838, 118380V (2021) https://doi.org/10.1117/12.2594019

KEYWORDS: Sensors, Crystals, Calibration, Ray tracing, Spectrometers, Statistical analysis, Reflection, X-rays

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Proceedings Article | 1 August 2021 Presentation

Image-based wavefront measurement for full-field x-ray microscopy

Yuto Tanaka, Satoshi Matsuyama, Takato Inoue, Nami Nakamura, Jumpei Yamada, Yoshiki Kohmura, Makina Yabashi, Kazuhiko Omote, Tetsuya Ishikawa, Kazuto Yamauchi

Proceedings Volume 11839, 118390A (2021) https://doi.org/10.1117/12.2595026

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Proceedings Article | 13 December 2020 Presentation

Development of precision Wolter mirrors towards PhoENiX mission for the Sun

Taro Sakao, Satoshi Matsuyama, Jumpei Yamada, Takato Inoue, Kentaro Hata, Hiroyuki Yamaguchi, Taku Hagiwara, Nami Nakamura, Kazuto Yamauchi, Yoshiki Kohmura, Yoshinori Suematsu, Noriyuki Narukage

Proceedings Volume 11444, 114440O (2020) https://doi.org/10.1117/12.2562077

KEYWORDS: Mirrors, Sun, X-ray imaging, X-rays, Particles, Magnetism, Point spread functions, Spectroscopy, Solar processes, Coronagraphy

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Proceedings Article | 15 September 2020 Presentation + Paper

A test bench of X-ray optics for next-generation high-energy high-flux X-ray beamlines

Hirokatsu Yumoto, Haruhiko Ohashi, Hiroshi Yamazaki, Yasunori Senba, Takahisa Koyama, Kenji Tamasaku, Ichiro Inoue, Taito Osaka, Jumpei Yamada, Makina Yabashi, Shunji Goto

Proceedings Volume 11492, 114920I (2020) https://doi.org/10.1117/12.2570154

KEYWORDS: Hard x-rays, Monochromators, Mirrors, Silicon, Optical components, Reflection, Crystals, Liquid crystals, X-ray optics, X-rays

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Proceedings Article | 22 August 2020 Presentation

Development of x-ray mirrors for XFEL sub-10 nm focusing system based on Wolter type III geometry

Jumpei Yamada, Takato Inoue, Satoshi Matsuyama, Nami Nakamura, Taito Osaka, Hirokatsu Yumoto, Takahisa Koyama, Haruhiko Ohashi, Makina Yabashi, Tetsuya Ishikawa, Kazuto Yamauchi

Proceedings Volume 11491, 114910B (2020) https://doi.org/10.1117/12.2566856

KEYWORDS: Mirrors, X-rays, X-ray lasers, Free electron lasers, Spatial coherence, Nonlinear optics, X-ray optics, Complex systems, Tolerancing, Interferometers

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Proceedings Article | 9 September 2019 Presentation

Development of high-resolution full-field x-ray microscope based on multilayer advanced Kirkpatrick-Baez mirrors (Conference Presentation)

Taku Hagiwara, Kazuhiko Omote, Raita Hirose, Yoshihiro Takeda, Yoshiki Kohmura, Makina Yabashi, Tetsuya Ishikawa, Kazuto Yamauchi, Satoshi Matsuyama, Jumpei Yamada

Proceedings Volume 11112, 1111207 (2019) https://doi.org/10.1117/12.2528366

KEYWORDS: Mirrors, X-rays, Microscopes, Spatial resolution, X-ray optics, Objectives, Cameras, Stars

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Proceedings Article | 18 September 2018 Presentation

Precision Wolter mirrors for future x-ray observations of the Sun (Conference Presentation)

Taro Sakao, Satoshi Matsuyama, Takumi Goto, Jumpei Yamada, Takato Inoue, Kentaro Hata, Hiroyuki Yamaguchi, Kazuto Yamauchi, Yoshiki Kohmura, Ayumi Kime, Yoshinori Suematsu, Noriyuki Narukage, Shin-nosuke Ishikawa

Proceedings Volume 10760, 107600B (2018) https://doi.org/10.1117/12.2320861

KEYWORDS: Mirrors, X-rays, Sun, Scattering, Point spread functions, Solar processes, Coronagraphy, X-ray optics, Plasma, Polishing

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Proceedings Article | 6 September 2017 Paper

Development of concave-convex imaging mirror system for a compact and achromatic full-field x-ray microscope

Jumpei Yamada, Satoshi Matsuyama, Shuhei Yasuda, Yoshiki Kohmura, Makina Yabashi, Tetsuya Ishikawa, Kazuto Yamauchi, Yasuhisa Sano

Proceedings Volume 10386, 103860C (2017) https://doi.org/10.1117/12.2272904

KEYWORDS: Mirrors, X-rays, X-ray optics, Imaging systems, X-ray imaging, Microscopes, Wavefronts, X-ray microscopy, Chromatic aberrations, Sensors

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Proceedings Article | 23 August 2017 Paper

Development of precision Wolter mirrors for solar x-ray observations

Taro Sakao, Satoshi Matsuyama, Takumi Goto, Jumpei Yamada, Shuhei Yasuda, Kazuto Yamauchi, Yoshiki Kohmura, Ayumi Kime, Yoshinori Suematsu, Noriyuki Narukage, Shin-nosuke Ishikawa, Akira Miyake, Tadakazu Maezawa, Hirokazu Hashizume

Proceedings Volume 10386, 103860E (2017) https://doi.org/10.1117/12.2273507

KEYWORDS: Mirrors, X-rays, X-ray telescopes, Coronagraphy, X-ray imaging, Polishing, X-ray optics, Synchrotrons, X-ray astronomy, Synchrotron x-ray imaging

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High resolution imagery of the Sun's X-ray corona provides an essential clue in understanding dynamics and heating processes of plasma particles there. However, X-ray imagery of the Sun with sub-arcsecond resolution has so far never been conducted due to severe technical difficulty in fabricating precision Wolter mirrors. For future X-ray observations of the solar corona, we are attempting to realize precision Wolter mirrors with sub-arcsecond resolution by adopting advanced surface polish and metrology methods to sector mirrors which consist of a portion of an entire annulus, by direct polishing onto the mirror substrate. Based on the knowledge obtained through fabrication of the first (in 2013) and second (in 2014) engineering Wolter mirrors and subsequent evaluations on their X-ray focusing performance, the third engineering mirror was made in 2015−2016. The primary target of improvement over the second mirror was to suppress figure error amplitude especially for spatial frequencies around 1 mm^-1 and to suppress the large astigmatism that was present in the second mirror, by introducing improved deterministic polish and smoothing on the precision mirror surfaces (32.5 mm × 10 mm in area for both parabola and hyperbola segments), as well as by careful characterization of the systematic error in the figure measurement system for the precision polish. Measurements on the focusing performance of thus-fabricated third Wolter mirror at SPring-8 synchrotron facility with 8 keV X-rays demonstrated that the mirror attained sub-arcsecond focusing performance with its HPD (half-power diameter) size reaching as small as ~0.2 arcsec for meridional focusing while ~0.1 arcsec for sagittal focusing. The meridional focusing achieved nearly diffraction limited performance (~0.12 arcsec FWHM for the PSF core). We also confirmed that the large astigmatism noted in the second mirror was correctly removed in the third mirror with the correction of the above-mentioned systematic error.

Showing 5 of 10 publications

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